internal error: entered unreachable code: we captured two identical projections

[shepmaster]

Code

[package]
name = "repro"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
reqwest = { version = "0.11", features = ["json", "brotli", "gzip", "native-tls", "deflate"] }
tokio = { version = "1", features = ["full"] }
futures = "0.3.25"
snafu = { version = "0.7.3", features = ["rust_1_61", "backtraces-impl-std"] }

[profile.release]
debug = true

Cargo.lock

# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3

[[package]]
name = "adler"
version = "1.0.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"

[[package]]
name = "alloc-no-stdlib"
version = "2.0.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cc7bb162ec39d46ab1ca8c77bf72e890535becd1751bb45f64c597edb4c8c6b3"

[[package]]
name = "alloc-stdlib"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "94fb8275041c72129eb51b7d0322c29b8387a0386127718b096429201a5d6ece"
dependencies = [
 "alloc-no-stdlib",
]

[[package]]
name = "async-compression"
version = "0.3.15"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "942c7cd7ae39e91bde4820d74132e9862e62c2f386c3aa90ccf55949f5bad63a"
dependencies = [
 "brotli",
 "flate2",
 "futures-core",
 "memchr",
 "pin-project-lite",
 "tokio",
]

[[package]]
name = "autocfg"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"

[[package]]
name = "base64"
version = "0.13.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"

[[package]]
name = "bitflags"
version = "1.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"

[[package]]
name = "brotli"
version = "3.3.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a1a0b1dbcc8ae29329621f8d4f0d835787c1c38bb1401979b49d13b0b305ff68"
dependencies = [
 "alloc-no-stdlib",
 "alloc-stdlib",
 "brotli-decompressor",
]

[[package]]
name = "brotli-decompressor"
version = "2.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "59ad2d4653bf5ca36ae797b1f4bb4dbddb60ce49ca4aed8a2ce4829f60425b80"
dependencies = [
 "alloc-no-stdlib",
 "alloc-stdlib",
]

[[package]]
name = "bumpalo"
version = "3.11.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "572f695136211188308f16ad2ca5c851a712c464060ae6974944458eb83880ba"

[[package]]
name = "bytes"
version = "1.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ec8a7b6a70fde80372154c65702f00a0f56f3e1c36abbc6c440484be248856db"

[[package]]
name = "cc"
version = "1.0.76"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "76a284da2e6fe2092f2353e51713435363112dfd60030e22add80be333fb928f"

[[package]]
name = "cfg-if"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"

[[package]]
name = "core-foundation"
version = "0.9.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "194a7a9e6de53fa55116934067c844d9d749312f75c6f6d0980e8c252f8c2146"
dependencies = [
 "core-foundation-sys",
 "libc",
]

[[package]]
name = "core-foundation-sys"
version = "0.8.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5827cebf4670468b8772dd191856768aedcb1b0278a04f989f7766351917b9dc"

[[package]]
name = "crc32fast"
version = "1.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d"
dependencies = [
 "cfg-if",
]

[[package]]
name = "doc-comment"
version = "0.3.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"

[[package]]
name = "encoding_rs"
version = "0.8.31"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9852635589dc9f9ea1b6fe9f05b50ef208c85c834a562f0c6abb1c475736ec2b"
dependencies = [
 "cfg-if",
]

[[package]]
name = "fastrand"
version = "1.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a7a407cfaa3385c4ae6b23e84623d48c2798d06e3e6a1878f7f59f17b3f86499"
dependencies = [
 "instant",
]

[[package]]
name = "flate2"
version = "1.0.24"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f82b0f4c27ad9f8bfd1f3208d882da2b09c301bc1c828fd3a00d0216d2fbbff6"
dependencies = [
 "crc32fast",
 "miniz_oxide",
]

[[package]]
name = "fnv"
version = "1.0.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"

[[package]]
name = "foreign-types"
version = "0.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
dependencies = [
 "foreign-types-shared",
]

[[package]]
name = "foreign-types-shared"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"

[[package]]
name = "form_urlencoded"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a9c384f161156f5260c24a097c56119f9be8c798586aecc13afbcbe7b7e26bf8"
dependencies = [
 "percent-encoding",
]

[[package]]
name = "futures"
version = "0.3.25"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "38390104763dc37a5145a53c29c63c1290b5d316d6086ec32c293f6736051bb0"
dependencies = [
 "futures-channel",
 "futures-core",
 "futures-executor",
 "futures-io",
 "futures-sink",
 "futures-task",
 "futures-util",
]

[[package]]
name = "futures-channel"
version = "0.3.25"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "52ba265a92256105f45b719605a571ffe2d1f0fea3807304b522c1d778f79eed"
dependencies = [
 "futures-core",
 "futures-sink",
]

[[package]]
name = "futures-core"
version = "0.3.25"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "04909a7a7e4633ae6c4a9ab280aeb86da1236243a77b694a49eacd659a4bd3ac"

[[package]]
name = "futures-executor"
version = "0.3.25"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7acc85df6714c176ab5edf386123fafe217be88c0840ec11f199441134a074e2"
dependencies = [
 "futures-core",
 "futures-task",
 "futures-util",
]

[[package]]
name = "futures-io"
version = "0.3.25"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "00f5fb52a06bdcadeb54e8d3671f8888a39697dcb0b81b23b55174030427f4eb"

[[package]]
name = "futures-macro"
version = "0.3.25"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bdfb8ce053d86b91919aad980c220b1fb8401a9394410e1c289ed7e66b61835d"
dependencies = [
 "proc-macro2",
 "quote",
 "syn",
]

[[package]]
name = "futures-sink"
version = "0.3.25"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "39c15cf1a4aa79df40f1bb462fb39676d0ad9e366c2a33b590d7c66f4f81fcf9"

[[package]]
name = "futures-task"
version = "0.3.25"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2ffb393ac5d9a6eaa9d3fdf37ae2776656b706e200c8e16b1bdb227f5198e6ea"

[[package]]
name = "futures-util"
version = "0.3.25"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "197676987abd2f9cadff84926f410af1c183608d36641465df73ae8211dc65d6"
dependencies = [
 "futures-channel",
 "futures-core",
 "futures-io",
 "futures-macro",
 "futures-sink",
 "futures-task",
 "memchr",
 "pin-project-lite",
 "pin-utils",
 "slab",
]

[[package]]
name = "h2"
version = "0.3.15"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5f9f29bc9dda355256b2916cf526ab02ce0aeaaaf2bad60d65ef3f12f11dd0f4"
dependencies = [
 "bytes",
 "fnv",
 "futures-core",
 "futures-sink",
 "futures-util",
 "http",
 "indexmap",
 "slab",
 "tokio",
 "tokio-util",
 "tracing",
]

[[package]]
name = "hashbrown"
version = "0.12.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"

[[package]]
name = "heck"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2540771e65fc8cb83cd6e8a237f70c319bd5c29f78ed1084ba5d50eeac86f7f9"

[[package]]
name = "hermit-abi"
version = "0.1.19"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
dependencies = [
 "libc",
]

[[package]]
name = "http"
version = "0.2.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "75f43d41e26995c17e71ee126451dd3941010b0514a81a9d11f3b341debc2399"
dependencies = [
 "bytes",
 "fnv",
 "itoa",
]

[[package]]
name = "http-body"
version = "0.4.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d5f38f16d184e36f2408a55281cd658ecbd3ca05cce6d6510a176eca393e26d1"
dependencies = [
 "bytes",
 "http",
 "pin-project-lite",
]

[[package]]
name = "httparse"
version = "1.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d897f394bad6a705d5f4104762e116a75639e470d80901eed05a860a95cb1904"

[[package]]
name = "httpdate"
version = "1.0.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c4a1e36c821dbe04574f602848a19f742f4fb3c98d40449f11bcad18d6b17421"

[[package]]
name = "hyper"
version = "0.14.23"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "034711faac9d2166cb1baf1a2fb0b60b1f277f8492fd72176c17f3515e1abd3c"
dependencies = [
 "bytes",
 "futures-channel",
 "futures-core",
 "futures-util",
 "h2",
 "http",
 "http-body",
 "httparse",
 "httpdate",
 "itoa",
 "pin-project-lite",
 "socket2",
 "tokio",
 "tower-service",
 "tracing",
 "want",
]

[[package]]
name = "hyper-tls"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d6183ddfa99b85da61a140bea0efc93fdf56ceaa041b37d553518030827f9905"
dependencies = [
 "bytes",
 "hyper",
 "native-tls",
 "tokio",
 "tokio-native-tls",
]

[[package]]
name = "idna"
version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e14ddfc70884202db2244c223200c204c2bda1bc6e0998d11b5e024d657209e6"
dependencies = [
 "unicode-bidi",
 "unicode-normalization",
]

[[package]]
name = "indexmap"
version = "1.9.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1885e79c1fc4b10f0e172c475f458b7f7b93061064d98c3293e98c5ba0c8b399"
dependencies = [
 "autocfg",
 "hashbrown",
]

[[package]]
name = "instant"
version = "0.1.12"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
dependencies = [
 "cfg-if",
]

[[package]]
name = "ipnet"
version = "2.5.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f88c5561171189e69df9d98bcf18fd5f9558300f7ea7b801eb8a0fd748bd8745"

[[package]]
name = "itoa"
version = "1.0.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4217ad341ebadf8d8e724e264f13e593e0648f5b3e94b3896a5df283be015ecc"

[[package]]
name = "js-sys"
version = "0.3.60"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "49409df3e3bf0856b916e2ceaca09ee28e6871cf7d9ce97a692cacfdb2a25a47"
dependencies = [
 "wasm-bindgen",
]

[[package]]
name = "lazy_static"
version = "1.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"

[[package]]
name = "libc"
version = "0.2.137"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fc7fcc620a3bff7cdd7a365be3376c97191aeaccc2a603e600951e452615bf89"

[[package]]
name = "lock_api"
version = "0.4.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "435011366fe56583b16cf956f9df0095b405b82d76425bc8981c0e22e60ec4df"
dependencies = [
 "autocfg",
 "scopeguard",
]

[[package]]
name = "log"
version = "0.4.17"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
dependencies = [
 "cfg-if",
]

[[package]]
name = "memchr"
version = "2.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"

[[package]]
name = "mime"
version = "0.3.16"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"

[[package]]
name = "miniz_oxide"
version = "0.5.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "96590ba8f175222643a85693f33d26e9c8a015f599c216509b1a6894af675d34"
dependencies = [
 "adler",
]

[[package]]
name = "mio"
version = "0.8.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e5d732bc30207a6423068df043e3d02e0735b155ad7ce1a6f76fe2baa5b158de"
dependencies = [
 "libc",
 "log",
 "wasi",
 "windows-sys 0.42.0",
]

[[package]]
name = "native-tls"
version = "0.2.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "07226173c32f2926027b63cce4bcd8076c3552846cbe7925f3aaffeac0a3b92e"
dependencies = [
 "lazy_static",
 "libc",
 "log",
 "openssl",
 "openssl-probe",
 "openssl-sys",
 "schannel",
 "security-framework",
 "security-framework-sys",
 "tempfile",
]

[[package]]
name = "num_cpus"
version = "1.14.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f6058e64324c71e02bc2b150e4f3bc8286db6c83092132ffa3f6b1eab0f9def5"
dependencies = [
 "hermit-abi",
 "libc",
]

[[package]]
name = "once_cell"
version = "1.16.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "86f0b0d4bf799edbc74508c1e8bf170ff5f41238e5f8225603ca7caaae2b7860"

[[package]]
name = "openssl"
version = "0.10.42"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "12fc0523e3bd51a692c8850d075d74dc062ccf251c0110668cbd921917118a13"
dependencies = [
 "bitflags",
 "cfg-if",
 "foreign-types",
 "libc",
 "once_cell",
 "openssl-macros",
 "openssl-sys",
]

[[package]]
name = "openssl-macros"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b501e44f11665960c7e7fcf062c7d96a14ade4aa98116c004b2e37b5be7d736c"
dependencies = [
 "proc-macro2",
 "quote",
 "syn",
]

[[package]]
name = "openssl-probe"
version = "0.1.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"

[[package]]
name = "openssl-sys"
version = "0.9.77"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b03b84c3b2d099b81f0953422b4d4ad58761589d0229b5506356afca05a3670a"
dependencies = [
 "autocfg",
 "cc",
 "libc",
 "pkg-config",
 "vcpkg",
]

[[package]]
name = "parking_lot"
version = "0.12.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3742b2c103b9f06bc9fff0a37ff4912935851bee6d36f3c02bcc755bcfec228f"
dependencies = [
 "lock_api",
 "parking_lot_core",
]

[[package]]
name = "parking_lot_core"
version = "0.9.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4dc9e0dc2adc1c69d09143aff38d3d30c5c3f0df0dad82e6d25547af174ebec0"
dependencies = [
 "cfg-if",
 "libc",
 "redox_syscall",
 "smallvec",
 "windows-sys 0.42.0",
]

[[package]]
name = "percent-encoding"
version = "2.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "478c572c3d73181ff3c2539045f6eb99e5491218eae919370993b890cdbdd98e"

[[package]]
name = "pin-project-lite"
version = "0.2.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e0a7ae3ac2f1173085d398531c705756c94a4c56843785df85a60c1a0afac116"

[[package]]
name = "pin-utils"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"

[[package]]
name = "pkg-config"
version = "0.3.26"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6ac9a59f73473f1b8d852421e59e64809f025994837ef743615c6d0c5b305160"

[[package]]
name = "playground-rust"
version = "0.1.0"
dependencies = [
 "futures",
 "reqwest",
 "snafu",
 "tokio",
]

[[package]]
name = "proc-macro2"
version = "1.0.47"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
dependencies = [
 "unicode-ident",
]

[[package]]
name = "quote"
version = "1.0.21"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
dependencies = [
 "proc-macro2",
]

[[package]]
name = "redox_syscall"
version = "0.2.16"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
dependencies = [
 "bitflags",
]

[[package]]
name = "remove_dir_all"
version = "0.5.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
dependencies = [
 "winapi",
]

[[package]]
name = "reqwest"
version = "0.11.13"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "68cc60575865c7831548863cc02356512e3f1dc2f3f82cb837d7fc4cc8f3c97c"
dependencies = [
 "async-compression",
 "base64",
 "bytes",
 "encoding_rs",
 "futures-core",
 "futures-util",
 "h2",
 "http",
 "http-body",
 "hyper",
 "hyper-tls",
 "ipnet",
 "js-sys",
 "log",
 "mime",
 "native-tls",
 "once_cell",
 "percent-encoding",
 "pin-project-lite",
 "serde",
 "serde_json",
 "serde_urlencoded",
 "tokio",
 "tokio-native-tls",
 "tokio-util",
 "tower-service",
 "url",
 "wasm-bindgen",
 "wasm-bindgen-futures",
 "web-sys",
 "winreg",
]

[[package]]
name = "ryu"
version = "1.0.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"

[[package]]
name = "schannel"
version = "0.1.20"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "88d6731146462ea25d9244b2ed5fd1d716d25c52e4d54aa4fb0f3c4e9854dbe2"
dependencies = [
 "lazy_static",
 "windows-sys 0.36.1",
]

[[package]]
name = "scopeguard"
version = "1.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"

[[package]]
name = "security-framework"
version = "2.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2bc1bb97804af6631813c55739f771071e0f2ed33ee20b68c86ec505d906356c"
dependencies = [
 "bitflags",
 "core-foundation",
 "core-foundation-sys",
 "libc",
 "security-framework-sys",
]

[[package]]
name = "security-framework-sys"
version = "2.6.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0160a13a177a45bfb43ce71c01580998474f556ad854dcbca936dd2841a5c556"
dependencies = [
 "core-foundation-sys",
 "libc",
]

[[package]]
name = "serde"
version = "1.0.147"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d193d69bae983fc11a79df82342761dfbf28a99fc8d203dca4c3c1b590948965"

[[package]]
name = "serde_json"
version = "1.0.88"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8e8b3801309262e8184d9687fb697586833e939767aea0dda89f5a8e650e8bd7"
dependencies = [
 "itoa",
 "ryu",
 "serde",
]

[[package]]
name = "serde_urlencoded"
version = "0.7.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d3491c14715ca2294c4d6a88f15e84739788c1d030eed8c110436aafdaa2f3fd"
dependencies = [
 "form_urlencoded",
 "itoa",
 "ryu",
 "serde",
]

[[package]]
name = "signal-hook-registry"
version = "1.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e51e73328dc4ac0c7ccbda3a494dfa03df1de2f46018127f60c693f2648455b0"
dependencies = [
 "libc",
]

[[package]]
name = "slab"
version = "0.4.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4614a76b2a8be0058caa9dbbaf66d988527d86d003c11a94fbd335d7661edcef"
dependencies = [
 "autocfg",
]

[[package]]
name = "smallvec"
version = "1.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a507befe795404456341dfab10cef66ead4c041f62b8b11bbb92bffe5d0953e0"

[[package]]
name = "snafu"
version = "0.7.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a152ba99b054b22972ee794cf04e5ef572da1229e33b65f3c57abbff0525a454"
dependencies = [
 "doc-comment",
 "snafu-derive",
]

[[package]]
name = "snafu-derive"
version = "0.7.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d5e79cdebbabaebb06a9bdbaedc7f159b410461f63611d4d0e3fb0fab8fed850"
dependencies = [
 "heck",
 "proc-macro2",
 "quote",
 "syn",
]

[[package]]
name = "socket2"
version = "0.4.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "02e2d2db9033d13a1567121ddd7a095ee144db4e1ca1b1bda3419bc0da294ebd"
dependencies = [
 "libc",
 "winapi",
]

[[package]]
name = "syn"
version = "1.0.103"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a864042229133ada95abf3b54fdc62ef5ccabe9515b64717bcb9a1919e59445d"
dependencies = [
 "proc-macro2",
 "quote",
 "unicode-ident",
]

[[package]]
name = "tempfile"
version = "3.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5cdb1ef4eaeeaddc8fbd371e5017057064af0911902ef36b39801f67cc6d79e4"
dependencies = [
 "cfg-if",
 "fastrand",
 "libc",
 "redox_syscall",
 "remove_dir_all",
 "winapi",
]

[[package]]
name = "tinyvec"
version = "1.6.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
dependencies = [
 "tinyvec_macros",
]

[[package]]
name = "tinyvec_macros"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"

[[package]]
name = "tokio"
version = "1.22.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "d76ce4a75fb488c605c54bf610f221cea8b0dafb53333c1a67e8ee199dcd2ae3"
dependencies = [
 "autocfg",
 "bytes",
 "libc",
 "memchr",
 "mio",
 "num_cpus",
 "parking_lot",
 "pin-project-lite",
 "signal-hook-registry",
 "socket2",
 "tokio-macros",
 "winapi",
]

[[package]]
name = "tokio-macros"
version = "1.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9724f9a975fb987ef7a3cd9be0350edcbe130698af5b8f7a631e23d42d052484"
dependencies = [
 "proc-macro2",
 "quote",
 "syn",
]

[[package]]
name = "tokio-native-tls"
version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f7d995660bd2b7f8c1568414c1126076c13fbb725c40112dc0120b78eb9b717b"
dependencies = [
 "native-tls",
 "tokio",
]

[[package]]
name = "tokio-util"
version = "0.7.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0bb2e075f03b3d66d8d8785356224ba688d2906a371015e225beeb65ca92c740"
dependencies = [
 "bytes",
 "futures-core",
 "futures-sink",
 "pin-project-lite",
 "tokio",
 "tracing",
]

[[package]]
name = "tower-service"
version = "0.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b6bc1c9ce2b5135ac7f93c72918fc37feb872bdc6a5533a8b85eb4b86bfdae52"

[[package]]
name = "tracing"
version = "0.1.37"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8ce8c33a8d48bd45d624a6e523445fd21ec13d3653cd51f681abf67418f54eb8"
dependencies = [
 "cfg-if",
 "pin-project-lite",
 "tracing-core",
]

[[package]]
name = "tracing-core"
version = "0.1.30"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "24eb03ba0eab1fd845050058ce5e616558e8f8d8fca633e6b163fe25c797213a"
dependencies = [
 "once_cell",
]

[[package]]
name = "try-lock"
version = "0.2.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "59547bce71d9c38b83d9c0e92b6066c4253371f15005def0c30d9657f50c7642"

[[package]]
name = "unicode-bidi"
version = "0.3.8"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "099b7128301d285f79ddd55b9a83d5e6b9e97c92e0ea0daebee7263e932de992"

[[package]]
name = "unicode-ident"
version = "1.0.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"

[[package]]
name = "unicode-normalization"
version = "0.1.22"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5c5713f0fc4b5db668a2ac63cdb7bb4469d8c9fed047b1d0292cc7b0ce2ba921"
dependencies = [
 "tinyvec",
]

[[package]]
name = "url"
version = "2.3.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0d68c799ae75762b8c3fe375feb6600ef5602c883c5d21eb51c09f22b83c4643"
dependencies = [
 "form_urlencoded",
 "idna",
 "percent-encoding",
]

[[package]]
name = "vcpkg"
version = "0.2.15"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"

[[package]]
name = "want"
version = "0.3.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1ce8a968cb1cd110d136ff8b819a556d6fb6d919363c61534f6860c7eb172ba0"
dependencies = [
 "log",
 "try-lock",
]

[[package]]
name = "wasi"
version = "0.11.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"

[[package]]
name = "wasm-bindgen"
version = "0.2.83"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "eaf9f5aceeec8be17c128b2e93e031fb8a4d469bb9c4ae2d7dc1888b26887268"
dependencies = [
 "cfg-if",
 "wasm-bindgen-macro",
]

[[package]]
name = "wasm-bindgen-backend"
version = "0.2.83"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4c8ffb332579b0557b52d268b91feab8df3615f265d5270fec2a8c95b17c1142"
dependencies = [
 "bumpalo",
 "log",
 "once_cell",
 "proc-macro2",
 "quote",
 "syn",
 "wasm-bindgen-shared",
]

[[package]]
name = "wasm-bindgen-futures"
version = "0.4.33"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "23639446165ca5a5de86ae1d8896b737ae80319560fbaa4c2887b7da6e7ebd7d"
dependencies = [
 "cfg-if",
 "js-sys",
 "wasm-bindgen",
 "web-sys",
]

[[package]]
name = "wasm-bindgen-macro"
version = "0.2.83"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "052be0f94026e6cbc75cdefc9bae13fd6052cdcaf532fa6c45e7ae33a1e6c810"
dependencies = [
 "quote",
 "wasm-bindgen-macro-support",
]

[[package]]
name = "wasm-bindgen-macro-support"
version = "0.2.83"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "07bc0c051dc5f23e307b13285f9d75df86bfdf816c5721e573dec1f9b8aa193c"
dependencies = [
 "proc-macro2",
 "quote",
 "syn",
 "wasm-bindgen-backend",
 "wasm-bindgen-shared",
]

[[package]]
name = "wasm-bindgen-shared"
version = "0.2.83"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1c38c045535d93ec4f0b4defec448e4291638ee608530863b1e2ba115d4fff7f"

[[package]]
name = "web-sys"
version = "0.3.60"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bcda906d8be16e728fd5adc5b729afad4e444e106ab28cd1c7256e54fa61510f"
dependencies = [
 "js-sys",
 "wasm-bindgen",
]

[[package]]
name = "winapi"
version = "0.3.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
dependencies = [
 "winapi-i686-pc-windows-gnu",
 "winapi-x86_64-pc-windows-gnu",
]

[[package]]
name = "winapi-i686-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"

[[package]]
name = "winapi-x86_64-pc-windows-gnu"
version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

[[package]]
name = "windows-sys"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ea04155a16a59f9eab786fe12a4a450e75cdb175f9e0d80da1e17db09f55b8d2"
dependencies = [
 "windows_aarch64_msvc 0.36.1",
 "windows_i686_gnu 0.36.1",
 "windows_i686_msvc 0.36.1",
 "windows_x86_64_gnu 0.36.1",
 "windows_x86_64_msvc 0.36.1",
]

[[package]]
name = "windows-sys"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5a3e1820f08b8513f676f7ab6c1f99ff312fb97b553d30ff4dd86f9f15728aa7"
dependencies = [
 "windows_aarch64_gnullvm",
 "windows_aarch64_msvc 0.42.0",
 "windows_i686_gnu 0.42.0",
 "windows_i686_msvc 0.42.0",
 "windows_x86_64_gnu 0.42.0",
 "windows_x86_64_gnullvm",
 "windows_x86_64_msvc 0.42.0",
]

[[package]]
name = "windows_aarch64_gnullvm"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "41d2aa71f6f0cbe00ae5167d90ef3cfe66527d6f613ca78ac8024c3ccab9a19e"

[[package]]
name = "windows_aarch64_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9bb8c3fd39ade2d67e9874ac4f3db21f0d710bee00fe7cab16949ec184eeaa47"

[[package]]
name = "windows_aarch64_msvc"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "dd0f252f5a35cac83d6311b2e795981f5ee6e67eb1f9a7f64eb4500fbc4dcdb4"

[[package]]
name = "windows_i686_gnu"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "180e6ccf01daf4c426b846dfc66db1fc518f074baa793aa7d9b9aaeffad6a3b6"

[[package]]
name = "windows_i686_gnu"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fbeae19f6716841636c28d695375df17562ca208b2b7d0dc47635a50ae6c5de7"

[[package]]
name = "windows_i686_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e2e7917148b2812d1eeafaeb22a97e4813dfa60a3f8f78ebe204bcc88f12f024"

[[package]]
name = "windows_i686_msvc"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "84c12f65daa39dd2babe6e442988fc329d6243fdce47d7d2d155b8d874862246"

[[package]]
name = "windows_x86_64_gnu"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4dcd171b8776c41b97521e5da127a2d86ad280114807d0b2ab1e462bc764d9e1"

[[package]]
name = "windows_x86_64_gnu"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "bf7b1b21b5362cbc318f686150e5bcea75ecedc74dd157d874d754a2ca44b0ed"

[[package]]
name = "windows_x86_64_gnullvm"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "09d525d2ba30eeb3297665bd434a54297e4170c7f1a44cad4ef58095b4cd2028"

[[package]]
name = "windows_x86_64_msvc"
version = "0.36.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c811ca4a8c853ef420abd8592ba53ddbbac90410fab6903b3e79972a631f7680"

[[package]]
name = "windows_x86_64_msvc"
version = "0.42.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f40009d85759725a34da6d89a94e63d7bdc50a862acf0dbc7c8e488f1edcb6f5"

[[package]]
name = "winreg"
version = "0.10.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "80d0f4e272c85def139476380b12f9ac60926689dd2e01d4923222f40580869d"
dependencies = [
 "winapi",
]

use futures::{stream, StreamExt};
use snafu::prelude::*;
use std::time::{Duration, Instant};

const REQUEST_COUNT: usize = 10;
const CONCURRENT_REQUESTS: usize = 1_000;

#[tokio::main]
async fn main() -> Result<()> {
    let client = reqwest::Client::builder()
        .build()
        .unwrap();

    let urls = vec![String::from("http://example.com"); REQUEST_COUNT];

    // Concurrent Requests
    let bodies = stream::iter(urls)
        .map(|url| {
            let req = client.get(&url);
            tokio::spawn(async move {
                let resp = req.send().await.unwrap();
                let text = resp.text().await.unwrap();
                Result::Ok((url, text))
            })
        })
        .buffer_unordered(CONCURRENT_REQUESTS);

    bodies
        .for_each(|b| async {
            match b {
                Ok(Ok((url, b))) => {}
                Err(e) => {}
                Ok(Err(e)) => {}
            }
        })
        .await;

    Ok(())
}

#[derive(Debug, Snafu)]
struct Error;

type Result<T, E = Error> = ::core::result::Result<T, E>;

Meta

rustc --version --verbose:

rustc 1.65.0 (897e37553 2022-11-02)
binary: rustc
commit-hash: 897e37553bba8b42751c67658967889d11ecd120
commit-date: 2022-11-02
host: aarch64-unknown-linux-gnu
release: 1.65.0
LLVM version: 15.0.0

Error output

$ cargo build
   Compiling proc-macro2 v1.0.47
   Compiling libc v0.2.137
   Compiling log v0.4.17
   Compiling lock_api v0.4.9
   Compiling memchr v2.5.0
   Compiling futures-core v0.3.25
   Compiling slab v0.4.7
   Compiling futures-task v0.3.25
   Compiling futures-channel v0.3.25
   Compiling tracing v0.1.37
   Compiling native-tls v0.2.11
   Compiling indexmap v1.9.1
   Compiling unicase v2.6.0
   Compiling want v0.3.0
   Compiling quote v1.0.21
   Compiling signal-hook-registry v1.4.0
   Compiling parking_lot_core v0.9.4
   Compiling mio v0.8.5
   Compiling socket2 v0.4.7
   Compiling num_cpus v1.14.0
   Compiling syn v1.0.103
   Compiling parking_lot v0.12.1
   Compiling openssl-sys v0.9.77
   Compiling mime_guess v2.0.4
   Compiling httparse v1.8.0
   Compiling crc32fast v1.3.2
   Compiling parking_lot_core v0.8.5
   Compiling flate2 v1.0.24
   Compiling getrandom v0.2.8
   Compiling mio v0.7.14
   Compiling encoding_rs v0.8.31
   Compiling rand_core v0.6.4
   Compiling parking_lot v0.11.2
   Compiling signal-hook v0.1.17
   Compiling rand_chacha v0.3.1
   Compiling libmimalloc-sys v0.1.27
   Compiling doc-comment v0.3.3
   Compiling anyhow v1.0.66
   Compiling crossterm v0.19.0
   Compiling tower v0.4.13
   Compiling rand v0.8.5
   Compiling mimalloc v0.1.31
   Compiling colour v0.6.0
   Compiling tokio-macros v1.8.0
   Compiling futures-macro v0.3.25
   Compiling openssl-macros v0.1.0
   Compiling serde_derive v1.0.147
   Compiling thiserror-impl v1.0.37
   Compiling snafu-derive v0.7.3
   Compiling async-trait v0.1.58
   Compiling openssl v0.10.42
   Compiling tokio v1.21.2
   Compiling futures-util v0.3.25
   Compiling thiserror v1.0.37
   Compiling snafu v0.7.3
   Compiling serde v1.0.147
   Compiling futures-executor v0.3.25
   Compiling futures v0.3.25
   Compiling tokio-util v0.7.4
   Compiling tokio-native-tls v0.3.0
   Compiling async-compression v0.3.15
   Compiling task-local-extensions v0.1.3
   Compiling h2 v0.3.15
   Compiling serde_json v1.0.87
   Compiling serde_urlencoded v0.7.1
   Compiling hyper v0.14.23
   Compiling hyper-tls v0.5.0
   Compiling reqwest v0.11.12
   Compiling reqwest-middleware v0.1.6
   Compiling playground-rust v0.1.0 (/home/shep/rust/code-review/candybar/playground-rust-repro)
error[E0412]: cannot find type `Url` in this scope
   --> src/main.rs:132:56
    |
132 |     UnableToSendRequest { source: reqwest::Error, url: Url },
    |                                                        ^^^ not found in this scope
    |
help: consider importing this struct
    |
1   | use reqwest::Url;
    |

error[E0412]: cannot find type `Url` in this scope
   --> src/main.rs:134:56
    |
134 |     UnableToGetTextBody { source: reqwest::Error, url: Url },
    |                                                        ^^^ not found in this scope
    |
help: consider importing this struct
    |
1   | use reqwest::Url;
    |

thread 'rustc' panicked at 'internal error: entered unreachable code: we captured two identical projections: capture1 = CapturedPlace { place: Place { base_ty: std::result::Result<std::result::Result<(std::string::String, std::string::String), _>, tokio::task::JoinError>, base: Upvar(UpvarId(HirId { owner: DefId(0:71 ~ playground_rust[8bc6]::main), local_id: 292 };`b`;DefId(0:77 ~ playground_rust[8bc6]::main::{closure#0}::{closure#0}::{closure#1}::{closure#0}))), projections: [Projection { ty: tokio::task::JoinError, kind: Field(0, 1) }] }, info: CaptureInfo { capture_kind_expr_id: Some(HirId { owner: DefId(0:71 ~ playground_rust[8bc6]::main), local_id: 297 }), path_expr_id: Some(HirId { owner: DefId(0:71 ~ playground_rust[8bc6]::main), local_id: 297 }), capture_kind: ByValue }, mutability: Not, region: None }, capture2 = CapturedPlace { place: Place { base_ty: std::result::Result<std::result::Result<(std::string::String, std::string::String), _>, tokio::task::JoinError>, base: Upvar(UpvarId(HirId { owner: DefId(0:71 ~ playground_rust[8bc6]::main), local_id: 292 };`b`;DefId(0:77 ~ playground_rust[8bc6]::main::{closure#0}::{closure#0}::{closure#1}::{closure#0}))), projections: [Projection { ty: std::result::Result<(std::string::String, std::string::String), _>, kind: Field(0, 0) }, Projection { ty: (std::string::String, std::string::String), kind: Field(0, 0) }, Projection { ty: std::string::String, kind: Field(1, 0) }] }, info: CaptureInfo { capture_kind_expr_id: Some(HirId { owner: DefId(0:71 ~ playground_rust[8bc6]::main), local_id: 297 }), path_expr_id: Some(HirId { owner: DefId(0:71 ~ playground_rust[8bc6]::main), local_id: 297 }), capture_kind: ByValue }, mutability: Not, region: None }', compiler/rustc_typeck/src/check/upvar.rs:712:17
stack backtrace:
   0:     0xffff9512dc40 - std::backtrace_rs::backtrace::libunwind::trace::h3b33c9cccdb04951
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0xffff9512dc40 - std::backtrace_rs::backtrace::trace_unsynchronized::h97f8a977acdf46b5
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0xffff9512dc40 - std::sys_common::backtrace::_print_fmt::h29a91018436399e1
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:66:5
   3:     0xffff9512dc40 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h5d71176f0c544d59
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:45:22
   4:     0xffff9517f794 - core::fmt::write::h7af9795d503e934d
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/core/src/fmt/mod.rs:1202:17
   5:     0xffff9511fefc - std::io::Write::write_fmt::h91d11b3091303616
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/io/mod.rs:1679:15
   6:     0xffff95130564 - std::sys_common::backtrace::_print::he156c8869851e532
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:48:5
   7:     0xffff95130564 - std::sys_common::backtrace::print::hd743019ecc0b72d3
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:35:9
   8:     0xffff95130564 - std::panicking::default_hook::{{closure}}::h7d67dd897e63f9d0
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:295:22
   9:     0xffff9513026c - std::panicking::default_hook::h400646a36e95f555
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:314:9
  10:     0xffff95d7736c - rustc_driver[707bca65092ca961]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0xffff95130d08 - std::panicking::rust_panic_with_hook::hd6f5d74b6033aefe
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:702:17
  12:     0xffff95130b70 - std::panicking::begin_panic_handler::{{closure}}::hfbcfd3f1517a4e00
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:588:13
  13:     0xffff9512e0d0 - std::sys_common::backtrace::__rust_end_short_backtrace::h53abd2304f3f7468
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:138:18
  14:     0xffff951308b4 - rust_begin_unwind
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:584:5
  15:     0xffff950fbdbc - core::panicking::panic_fmt::h34b2b0205eaf5cf3
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/core/src/panicking.rs:142:14
  16:     0xffff98f5fa1c - <[rustc_middle[8eb223e2294dc9c]::ty::closure::CapturedPlace]>::sort_by::<<rustc_typeck[ab74e667ce3174e8]::check::fn_ctxt::FnCtxt>::compute_min_captures::{closure#1}>::{closure#0}
  17:     0xffff98f4f244 - alloc[268feb060e59a892]::slice::merge_sort::<rustc_middle[8eb223e2294dc9c]::ty::closure::CapturedPlace, <[rustc_middle[8eb223e2294dc9c]::ty::closure::CapturedPlace]>::sort_by<<rustc_typeck[ab74e667ce3174e8]::check::fn_ctxt::FnCtxt>::compute_min_captures::{closure#1}>::{closure#0}>
  18:     0xffff98cf7804 - <rustc_typeck[ab74e667ce3174e8]::check::fn_ctxt::FnCtxt>::compute_min_captures
  19:     0xffff98d0dabc - <rustc_typeck[ab74e667ce3174e8]::check::fn_ctxt::FnCtxt>::analyze_closure
  20:     0xffff98f397f0 - <rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor as rustc_hir[23f83174b72da2b]::intravisit::Visitor>::visit_expr
  21:     0xffff98f128e4 - rustc_hir[23f83174b72da2b]::intravisit::walk_expr::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  22:     0xffff98f397d0 - <rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor as rustc_hir[23f83174b72da2b]::intravisit::Visitor>::visit_expr
  23:     0xffff98f12cbc - rustc_hir[23f83174b72da2b]::intravisit::walk_expr::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  24:     0xffff98f128e4 - rustc_hir[23f83174b72da2b]::intravisit::walk_expr::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  25:     0xffff98f12a5c - rustc_hir[23f83174b72da2b]::intravisit::walk_expr::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  26:     0xffff98f12b70 - rustc_hir[23f83174b72da2b]::intravisit::walk_expr::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  27:     0xffff98f397d0 - <rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor as rustc_hir[23f83174b72da2b]::intravisit::Visitor>::visit_expr
  28:     0xffff98f128e4 - rustc_hir[23f83174b72da2b]::intravisit::walk_expr::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  29:     0xffff98ef81e4 - rustc_hir[23f83174b72da2b]::intravisit::walk_local::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  30:     0xffff98f12ba4 - rustc_hir[23f83174b72da2b]::intravisit::walk_expr::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  31:     0xffff98f397d0 - <rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor as rustc_hir[23f83174b72da2b]::intravisit::Visitor>::visit_expr
  32:     0xffff98ef81e4 - rustc_hir[23f83174b72da2b]::intravisit::walk_local::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  33:     0xffff98f12ba4 - rustc_hir[23f83174b72da2b]::intravisit::walk_expr::<rustc_typeck[ab74e667ce3174e8]::check::upvar::InferBorrowKindVisitor>
  34:     0xffff98e47a70 - <rustc_infer[e7d83e60288ea4e1]::infer::InferCtxtBuilder>::enter::<&rustc_middle[8eb223e2294dc9c]::ty::context::TypeckResults, <rustc_typeck[ab74e667ce3174e8]::check::inherited::InheritedBuilder>::enter<rustc_typeck[ab74e667ce3174e8]::check::typeck_with_fallback<rustc_typeck[ab74e667ce3174e8]::check::typeck::{closure#0}>::{closure#1}, &rustc_middle[8eb223e2294dc9c]::ty::context::TypeckResults>::{closure#0}>
  35:     0xffff98db8fec - rustc_typeck[ab74e667ce3174e8]::check::typeck
  36:     0xffff998e6594 - <rustc_query_system[2fb0e7321504b2f4]::dep_graph::graph::DepGraph<rustc_middle[8eb223e2294dc9c]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[8eb223e2294dc9c]::ty::context::TyCtxt, rustc_span[678915abd2b4f748]::def_id::LocalDefId, &rustc_middle[8eb223e2294dc9c]::ty::context::TypeckResults>
  37:     0xffff99a9c408 - rustc_query_system[2fb0e7321504b2f4]::query::plumbing::try_execute_query::<rustc_query_impl[459f05cc45f8797]::plumbing::QueryCtxt, rustc_query_system[2fb0e7321504b2f4]::query::caches::DefaultCache<rustc_span[678915abd2b4f748]::def_id::LocalDefId, &rustc_middle[8eb223e2294dc9c]::ty::context::TypeckResults>>
  38:     0xffff99b5db40 - rustc_query_system[2fb0e7321504b2f4]::query::plumbing::get_query::<rustc_query_impl[459f05cc45f8797]::queries::typeck, rustc_query_impl[459f05cc45f8797]::plumbing::QueryCtxt>
  39:     0xffff98d18128 - rustc_data_structures[c78496f24077fab1]::sync::par_for_each_in::<&[rustc_span[678915abd2b4f748]::def_id::LocalDefId], <rustc_middle[8eb223e2294dc9c]::hir::map::Map>::par_body_owners<rustc_typeck[ab74e667ce3174e8]::check::typeck_item_bodies::{closure#0}>::{closure#0}>
  40:     0xffff98dbcdac - rustc_typeck[ab74e667ce3174e8]::check::typeck_item_bodies
  41:     0xffff99913270 - <rustc_query_system[2fb0e7321504b2f4]::dep_graph::graph::DepGraph<rustc_middle[8eb223e2294dc9c]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[8eb223e2294dc9c]::ty::context::TyCtxt, (), ()>
  42:     0xffff99b001cc - rustc_query_system[2fb0e7321504b2f4]::query::plumbing::try_execute_query::<rustc_query_impl[459f05cc45f8797]::plumbing::QueryCtxt, rustc_query_system[2fb0e7321504b2f4]::query::caches::DefaultCache<(), ()>>
  43:     0xffff99b4cd3c - rustc_query_system[2fb0e7321504b2f4]::query::plumbing::get_query::<rustc_query_impl[459f05cc45f8797]::queries::typeck_item_bodies, rustc_query_impl[459f05cc45f8797]::plumbing::QueryCtxt>
  44:     0xffff98dcc6b8 - <rustc_session[33c54f278648ba32]::session::Session>::time::<(), rustc_typeck[ab74e667ce3174e8]::check_crate::{closure#7}>
  45:     0xffff98eee090 - rustc_typeck[ab74e667ce3174e8]::check_crate
  46:     0xffff95e9778c - rustc_interface[f7da80859526f58]::passes::analysis
  47:     0xffff9990a7ec - <rustc_query_system[2fb0e7321504b2f4]::dep_graph::graph::DepGraph<rustc_middle[8eb223e2294dc9c]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[8eb223e2294dc9c]::ty::context::TyCtxt, (), core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>>
  48:     0xffff99af573c - rustc_query_system[2fb0e7321504b2f4]::query::plumbing::try_execute_query::<rustc_query_impl[459f05cc45f8797]::plumbing::QueryCtxt, rustc_query_system[2fb0e7321504b2f4]::query::caches::DefaultCache<(), core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>>>
  49:     0xffff99b5df68 - rustc_query_system[2fb0e7321504b2f4]::query::plumbing::get_query::<rustc_query_impl[459f05cc45f8797]::queries::analysis, rustc_query_impl[459f05cc45f8797]::plumbing::QueryCtxt>
  50:     0xffff95de0144 - <rustc_interface[f7da80859526f58]::passes::QueryContext>::enter::<rustc_driver[707bca65092ca961]::run_compiler::{closure#1}::{closure#2}::{closure#3}, core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>>
  51:     0xffff95d7d1bc - rustc_interface[f7da80859526f58]::interface::create_compiler_and_run::<core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>, rustc_driver[707bca65092ca961]::run_compiler::{closure#1}>
  52:     0xffff95dea1b0 - <scoped_tls[f1442872682dc609]::ScopedKey<rustc_span[678915abd2b4f748]::SessionGlobals>>::set::<rustc_interface[f7da80859526f58]::interface::run_compiler<core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>, rustc_driver[707bca65092ca961]::run_compiler::{closure#1}>::{closure#0}, core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>>
  53:     0xffff95dac4f0 - std[bda0dce2a3226c65]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[f7da80859526f58]::util::run_in_thread_pool_with_globals<rustc_interface[f7da80859526f58]::interface::run_compiler<core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>, rustc_driver[707bca65092ca961]::run_compiler::{closure#1}>::{closure#0}, core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>>::{closure#0}, core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>>
  54:     0xffff95db0770 - <<std[bda0dce2a3226c65]::thread::Builder>::spawn_unchecked_<rustc_interface[f7da80859526f58]::util::run_in_thread_pool_with_globals<rustc_interface[f7da80859526f58]::interface::run_compiler<core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>, rustc_driver[707bca65092ca961]::run_compiler::{closure#1}>::{closure#0}, core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>>::{closure#0}, core[58c535de022a3993]::result::Result<(), rustc_errors[cd6544614ea58931]::ErrorGuaranteed>>::{closure#1} as core[58c535de022a3993]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  55:     0xffff95139e3c - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf543cb0a771f4677
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/alloc/src/boxed.rs:1940:9
  56:     0xffff95139e3c - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8ae6f9935b15c9a8
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/alloc/src/boxed.rs:1940:9
  57:     0xffff95139e3c - std::sys::unix::thread::Thread::new::thread_start::h9c7529059c2b9f5e
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys/unix/thread.rs:108:17
  58:     0xffff94f5d5c8 - start_thread
                               at ./nptl/./nptl/pthread_create.c:442:8
  59:     0xffff94fc5d1c - thread_start
                               at ./misc/../sysdeps/unix/sysv/linux/aarch64/clone.S:79
  60:                0x0 - <unknown>

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.65.0 (897e37553 2022-11-02) running on aarch64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C debuginfo=2 -C incremental=[REDACTED]

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [typeck] type-checking `main`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack

[Noratrieb]

I will try to reduce this to an MCVE.

[shepmaster]

Changing Result::Ok((url, text)) to Result::<_>::Ok((url, text)) appears to avoid the ICE, so that may be a useful place to focus.

[Noratrieb]

Minimized it down to 60 lines without any dependencies. Maybe it can be minimized further but it's getting really hard. I've also left a few comments to say what's going on.

"Minimized"

trait Project {
    type Assoc;
}

pub struct Wrap<T>(T);

impl<T> Project for Wrap<T> {
    type Assoc = Result<T, ()>;
}

pub trait Stream {
    type Item;

    fn get_projected<Fut, F>(self, f: F) -> Self::Item
    where
        F: FnMut(Self::Item) -> Fut,
        Self: Sized,
    {
        loop {}
    }
}

pub struct ProjectFnOutput<F>(F);

impl<F> Stream for ProjectFnOutput<F>
where
    F: GetFnOutput,
    F::Output: Project,
{
    type Item = <F::Output as Project>::Assoc;
}

pub trait GetFnOutput {
    type Output;
}

impl<T, R> GetFnOutput for T
where
    T: FnOnce() -> R,
{
    type Output = R;
}

fn main() {
    let proj = ProjectFnOutput(|| {
        Wrap(
            // This is `Result<(), _1>` but since no type annotations are provided the tpye of _1 is unknown.
            Ok(()),
        )
    });

    proj.get_projected(|b| async {
        // The type of `b` is `Result<Result<(), _1>, ()> where _1 is unknown.
        match b {
            Ok(Ok(url)) => {}
            Err(e) => {}
            Ok(Err(e)) => {}
        }
    });
}

[shepmaster]

This appears to have regressed in Rust 1.64

1.62

error[E0282]: type annotations needed for `Result<Result<(), E>, ()>`
  --> a.rs:52:25
   |
52 |     proj.get_projected(|b| async {
   |                         ^ consider giving this closure parameter the explicit type `Result<Result<(), E>, ()>`, where the type parameter `E` is specified

1.63

error[E0282]: type annotations needed for `Result<Result<(), E>, ()>`
  --> a.rs:52:25
   |
52 |     proj.get_projected(|b| async {
   |                         ^
   |
help: consider giving this closure parameter an explicit type, where the type for type parameter `E` is specified
   |
52 |     proj.get_projected(|b: Result<Result<(), E>, ()>| async {
   |                          +++++++++++++++++++++++++++

1.64

thread 'rustc' panicked at 'internal error: entered unreachable code: we captured two identical projection

[shepmaster]

This continues to ICE on beta and nightly

% rustc +beta -vV
rustc 1.66.0-beta.2 (0040709e3 2022-11-20)
binary: rustc
commit-hash: 0040709e39bfa159d099ee14628ad4ac72f91406
commit-date: 2022-11-20
host: aarch64-apple-darwin
release: 1.66.0-beta.2
LLVM version: 15.0.2

% rustc +nightly -vV
rustc 1.67.0-nightly (a28f3c88e 2022-11-20)
binary: rustc
commit-hash: a28f3c88e50a77bc2a91889241248c4543854e61
commit-date: 2022-11-20
host: aarch64-apple-darwin
release: 1.67.0-nightly
LLVM version: 15.0.4

[albertlarsan68]

I bisected the regression, here is the output of cargo bisect-rustc:

searched nightlies: from nightly-2022-06-24 to nightly-2022-08-05
regressed nightly: nightly-2022-07-14
searched commit range: 1c7b36d...87588a2
regressed commit: c80dde4

bisected with cargo-bisect-rustc v0.6.4

Host triple: x86_64-pc-windows-msvc
Reproduce with:

cargo bisect-rustc --access=github --regress=ice --start 1.63.0 --end 1.64.0 -- check

[Noratrieb]

Out of these #98574 seems the most likely, cc @dingxiangfei2009

[dingxiangfei2009]

Zooming onto expr_use_visitor changeset.

[dingxiangfei2009]

Found MVCE:

type Result<T, E = Error> = ::core::result::Result<T, E>;
struct Error;

trait ForEach {
    type Input;
    fn for_each<F, U>(self, f: F)
    where
        F: FnOnce(Self::Input) -> U;
}

impl<T> ForEach for A<T> {
    type Input = T;
    fn for_each<F, U>(self, f: F)
    where
        F: FnOnce(Self::Input) -> U,
    {
        todo!()
    }
}

struct A<T>(T);

fn main() {
    let a = A(Result::Ok(Result::Ok(())));
     //~^ ERROR type annotations needed
    a.for_each(|a: Result<_>| {
        let f = || {
            match a {
                Ok(Ok(a)) => {},
                Ok(Err(a)) => {},
                Err(a) => {},
            }
        };
    });
}

Output from Rust Playground

   Compiling playground v0.0.1 (/playground)
thread 'rustc' panicked at 'internal error: entered unreachable code: we captured two identical projections: capture1 = CapturedPlace { place: Place { base_ty: std::result::Result<std::result::Result<(), _>, Error>, base: Upvar(UpvarId(HirId { owner: DefId(0:23 ~ playground[d8bd]::main), local_id: 22 };`a`;DefId(0:25 ~ playground[d8bd]::main::{closure#0}::{closure#0}))), projections: [Projection { ty: Error, kind: Field(0, 1) }] }, info: CaptureInfo { capture_kind_expr_id: Some(HirId { owner: DefId(0:23 ~ playground[d8bd]::main), local_id: 25 }), path_expr_id: Some(HirId { owner: DefId(0:23 ~ playground[d8bd]::main), local_id: 25 }), capture_kind: ByValue }, mutability: Not, region: None }, capture2 = CapturedPlace { place: Place { base_ty: std::result::Result<std::result::Result<(), _>, Error>, base: Upvar(UpvarId(HirId { owner: DefId(0:23 ~ playground[d8bd]::main), local_id: 22 };`a`;DefId(0:25 ~ playground[d8bd]::main::{closure#0}::{closure#0}))), projections: [Projection { ty: std::result::Result<(), _>, kind: Field(0, 0) }, Projection { ty: (), kind: Field(0, 0) }] }, info: CaptureInfo { capture_kind_expr_id: Some(HirId { owner: DefId(0:23 ~ playground[d8bd]::main), local_id: 25 }), path_expr_id: Some(HirId { owner: DefId(0:23 ~ playground[d8bd]::main), local_id: 25 }), capture_kind: ByRef(ImmBorrow) }, mutability: Not, region: Some('_#0r) }', compiler/rustc_typeck/src/check/upvar.rs:712:17
stack backtrace:
   0:     0x7f35fd402d40 - std::backtrace_rs::backtrace::libunwind::trace::h32eb3e08e874dd27
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f35fd402d40 - std::backtrace_rs::backtrace::trace_unsynchronized::haa3f451d27bc11a5
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f35fd402d40 - std::sys_common::backtrace::_print_fmt::h5b94a01bb4289bb5
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7f35fd402d40 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hb070b7fa7e3175df
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7f35fd45dbfe - core::fmt::write::hd5207aebbb9a86e9
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/core/src/fmt/mod.rs:1202:17
   5:     0x7f35fd3f3935 - std::io::Write::write_fmt::h3bd699bbd129ab8a
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/io/mod.rs:1679:15
   6:     0x7f35fd4059f3 - std::sys_common::backtrace::_print::h7a21be552fdf58da
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7f35fd4059f3 - std::sys_common::backtrace::print::ha85c41fe4dd80b13
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7f35fd4059f3 - std::panicking::default_hook::{{closure}}::h04cca40023d0eeca
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:295:22
   9:     0x7f35fd4056df - std::panicking::default_hook::haa3ca8c310ed5402
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:314:9
  10:     0x7f35ffc332e1 - rustc_driver[cfb34b1539811fe8]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7f35fd40622d - std::panicking::rust_panic_with_hook::h7b190ce1a948faac
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:702:17
  12:     0x7f35fd406087 - std::panicking::begin_panic_handler::{{closure}}::hbafbfdc3e1b97f68
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:588:13
  13:     0x7f35fd4031ec - std::sys_common::backtrace::__rust_end_short_backtrace::hda93e5fef243b4c0
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys_common/backtrace.rs:138:18
  14:     0x7f35fd405da2 - rust_begin_unwind
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/panicking.rs:584:5
  15:     0x7f35fd45a7d3 - core::panicking::panic_fmt::h8d17ca1073d9a733
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/core/src/panicking.rs:142:14
  16:     0x7f35ff6aa606 - <[rustc_middle[a9ca1c3f9fd197cd]::ty::closure::CapturedPlace]>::sort_by::<<rustc_typeck[4a3b2f91c49b3c3e]::check::fn_ctxt::FnCtxt>::compute_min_captures::{closure#1}>::{closure#0}
  17:     0x7f35ff6a91f1 - alloc[188ed69dc0d14b4b]::slice::merge_sort::<rustc_middle[a9ca1c3f9fd197cd]::ty::closure::CapturedPlace, <[rustc_middle[a9ca1c3f9fd197cd]::ty::closure::CapturedPlace]>::sort_by<<rustc_typeck[4a3b2f91c49b3c3e]::check::fn_ctxt::FnCtxt>::compute_min_captures::{closure#1}>::{closure#0}>
  18:     0x7f35ff6a7a3e - <rustc_typeck[4a3b2f91c49b3c3e]::check::fn_ctxt::FnCtxt>::compute_min_captures
  19:     0x7f35ff6a1ad2 - <rustc_typeck[4a3b2f91c49b3c3e]::check::fn_ctxt::FnCtxt>::analyze_closure
  20:     0x7f35fe6717a5 - <rustc_typeck[4a3b2f91c49b3c3e]::check::upvar::InferBorrowKindVisitor as rustc_hir[f29014e7b3f8eb6c]::intravisit::Visitor>::visit_expr
  21:     0x7f35fe671a07 - <rustc_typeck[4a3b2f91c49b3c3e]::check::upvar::InferBorrowKindVisitor as rustc_hir[f29014e7b3f8eb6c]::intravisit::Visitor>::visit_expr
  22:     0x7f35fe671781 - <rustc_typeck[4a3b2f91c49b3c3e]::check::upvar::InferBorrowKindVisitor as rustc_hir[f29014e7b3f8eb6c]::intravisit::Visitor>::visit_expr
  23:     0x7f35fe671a7c - <rustc_typeck[4a3b2f91c49b3c3e]::check::upvar::InferBorrowKindVisitor as rustc_hir[f29014e7b3f8eb6c]::intravisit::Visitor>::visit_expr
  24:     0x7f35fe6719dd - <rustc_typeck[4a3b2f91c49b3c3e]::check::upvar::InferBorrowKindVisitor as rustc_hir[f29014e7b3f8eb6c]::intravisit::Visitor>::visit_expr
  25:     0x7f35ff258bbb - <rustc_infer[ed26b14e1208c12f]::infer::InferCtxtBuilder>::enter::<&rustc_middle[a9ca1c3f9fd197cd]::ty::context::TypeckResults, <rustc_typeck[4a3b2f91c49b3c3e]::check::inherited::InheritedBuilder>::enter<rustc_typeck[4a3b2f91c49b3c3e]::check::typeck_with_fallback<rustc_typeck[4a3b2f91c49b3c3e]::check::typeck::{closure#0}>::{closure#1}, &rustc_middle[a9ca1c3f9fd197cd]::ty::context::TypeckResults>::{closure#0}>
  26:     0x7f35ff256c29 - rustc_typeck[4a3b2f91c49b3c3e]::check::typeck
  27:     0x7f35ff4f5103 - rustc_query_system[860ed7b39cdfb46b]::query::plumbing::try_execute_query::<rustc_query_impl[d6191eea714bd250]::plumbing::QueryCtxt, rustc_query_system[860ed7b39cdfb46b]::query::caches::DefaultCache<rustc_span[8f00505efff112e2]::def_id::LocalDefId, &rustc_middle[a9ca1c3f9fd197cd]::ty::context::TypeckResults>>
  28:     0x7f35ffb6fcae - <rustc_query_impl[d6191eea714bd250]::Queries as rustc_middle[a9ca1c3f9fd197cd]::ty::query::QueryEngine>::typeck
  29:     0x7f35ff9b0057 - rustc_data_structures[62ce3989ce8140ee]::sync::par_for_each_in::<&[rustc_span[8f00505efff112e2]::def_id::LocalDefId], <rustc_middle[a9ca1c3f9fd197cd]::hir::map::Map>::par_body_owners<rustc_typeck[4a3b2f91c49b3c3e]::check::typeck_item_bodies::{closure#0}>::{closure#0}>
  30:     0x7f35ff9afe13 - rustc_typeck[4a3b2f91c49b3c3e]::check::typeck_item_bodies
  31:     0x7f35ff8b8f99 - rustc_query_system[860ed7b39cdfb46b]::query::plumbing::try_execute_query::<rustc_query_impl[d6191eea714bd250]::plumbing::QueryCtxt, rustc_query_system[860ed7b39cdfb46b]::query::caches::DefaultCache<(), ()>>
  32:     0x7f35ff8b8cc7 - rustc_query_system[860ed7b39cdfb46b]::query::plumbing::get_query::<rustc_query_impl[d6191eea714bd250]::queries::typeck_item_bodies, rustc_query_impl[d6191eea714bd250]::plumbing::QueryCtxt>
  33:     0x7f35fefa6a9f - <rustc_session[c5946fac61f8bc34]::session::Session>::time::<(), rustc_typeck[4a3b2f91c49b3c3e]::check_crate::{closure#7}>
  34:     0x7f35fefa665f - rustc_typeck[4a3b2f91c49b3c3e]::check_crate
  35:     0x7f35fefa5c27 - rustc_interface[3182dd864eff9d7d]::passes::analysis
  36:     0x7f35ffa037ed - rustc_query_system[860ed7b39cdfb46b]::query::plumbing::try_execute_query::<rustc_query_impl[d6191eea714bd250]::plumbing::QueryCtxt, rustc_query_system[860ed7b39cdfb46b]::query::caches::DefaultCache<(), core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>>
  37:     0x7f35ffa03517 - rustc_query_system[860ed7b39cdfb46b]::query::plumbing::get_query::<rustc_query_impl[d6191eea714bd250]::queries::analysis, rustc_query_impl[d6191eea714bd250]::plumbing::QueryCtxt>
  38:     0x7f35feaef897 - <rustc_interface[3182dd864eff9d7d]::passes::QueryContext>::enter::<rustc_driver[cfb34b1539811fe8]::run_compiler::{closure#1}::{closure#2}::{closure#3}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>
  39:     0x7f35feae328c - rustc_interface[3182dd864eff9d7d]::interface::create_compiler_and_run::<core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>, rustc_driver[cfb34b1539811fe8]::run_compiler::{closure#1}>
  40:     0x7f35feae1ac1 - <scoped_tls[e395fa6e23b19669]::ScopedKey<rustc_span[8f00505efff112e2]::SessionGlobals>>::set::<rustc_interface[3182dd864eff9d7d]::interface::run_compiler<core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>, rustc_driver[cfb34b1539811fe8]::run_compiler::{closure#1}>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>
  41:     0x7f35feae17af - std[71cb4861428b0c25]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[3182dd864eff9d7d]::util::run_in_thread_pool_with_globals<rustc_interface[3182dd864eff9d7d]::interface::run_compiler<core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>, rustc_driver[cfb34b1539811fe8]::run_compiler::{closure#1}>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>
  42:     0x7f35ffa96d70 - <<std[71cb4861428b0c25]::thread::Builder>::spawn_unchecked_<rustc_interface[3182dd864eff9d7d]::util::run_in_thread_pool_with_globals<rustc_interface[3182dd864eff9d7d]::interface::run_compiler<core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>, rustc_driver[cfb34b1539811fe8]::run_compiler::{closure#1}>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>::{closure#0}, core[8c92e53db3fc2eaa]::result::Result<(), rustc_errors[f77a66b68db622d5]::ErrorGuaranteed>>::{closure#1} as core[8c92e53db3fc2eaa]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  43:     0x7f35fd410003 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h49f797984e2121bf
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/alloc/src/boxed.rs:1940:9
  44:     0x7f35fd410003 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hfa4f3d0ee6440e0b
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/alloc/src/boxed.rs:1940:9
  45:     0x7f35fd410003 - std::sys::unix::thread::Thread::new::thread_start::h62ca48b42d48a8fc
                               at /rustc/897e37553bba8b42751c67658967889d11ecd120/library/std/src/sys/unix/thread.rs:108:17
  46:     0x7f35fd2e3609 - start_thread
  47:     0x7f35fd206133 - clone
  48:                0x0 - <unknown>

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.65.0 (897e37553 2022-11-02) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type bin -C embed-bitcode=no -C codegen-units=1 -C debuginfo=2

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [typeck] type-checking `main`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `playground`