ICE: E0109: `suggestion must not have overlapping parts`

[matthiaskrgr]

Code

enum Enum<T> {  SVariant { _v: T }, UVariant }

type AliasFixed = Enum<()>;

macro_rules! is_variant {
    (TSVariant, ) => (!);
    (SVariant, ) => (!);
    (UVariant, $expr:expr) => (is_variant!(@check UVariant, {}, $expr));
    (@check $variant:ident, $matcher:tt, $expr:expr) => (
        assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant(()))> $matcher = $expr { true } else { false },
                );
    );
}

fn main() {
    is_variant!(UVariant, AliasFixed::UVariant);
}

Meta

rustc --version --verbose:

cdca82c2c853c8373c0c333a2fd7d1b480d7f1d21

Error output

error[E0412]: cannot find type `TSVariant` in this scope
  --> a.rs:10:48
   |
10 |         assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant(()))> $matcher = $expr { true } else { false },
   |                                                ^^^^^^^^^ not found in this scope
...
16 |     is_variant!(UVariant, AliasFixed::UVariant);
   |     ------------------------------------------- in this macro invocation
   |
   = note: this error originates in the macro `is_variant` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0214]: parenthesized type parameters may only be used with a `Fn` trait
  --> a.rs:10:71
   |
10 |         assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant(()))> $matcher = $expr { true } else { false },
   |                                                                       ^^^^^^^^^^^^^ only `Fn` traits may use parentheses
...
16 |     is_variant!(UVariant, AliasFixed::UVariant);
   |     ------------------------------------------- in this macro invocation
   |
   = note: this error originates in the macro `is_variant` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use angle brackets instead
   |
10 |         assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant<()>)> $matcher = $expr { true } else { false },
   |                                                                                ~  ~

error[E0109]: type arguments are not allowed on this type
  --> a.rs:10:47
   |
8  |     (UVariant, $expr:expr) => (is_variant!(@check UVariant, {}, $expr));
   |                                                   -------- not allowed on this type
9  |     (@check $variant:ident, $matcher:tt, $expr:expr) => (
10 |         assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant(()))> $matcher = $expr { true } else { false },
   |                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type argument not allowed
...
16 |     is_variant!(UVariant, AliasFixed::UVariant);
   |     ------------------------------------------- in this macro invocation
   |
   = note: enum variants can't have type parameters
   = note: this error originates in the macro `is_variant` (in Nightly builds, run with -Z macro-backtrace for more info)
help: you might have meant to specify type parameters on enum `Enum`
   |
8  ~     (UVariant, $expr:expr) => (is_variant!(@check UVariant, {}, $expr));
9  +     (@check $variant:ident, $matcher:tt, $expr:expr) => (
10 ~         assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant(()))>::$variant::<(TSVariant, Enum::<()>::TSVariant(()))> $matcher = $expr { true } else { false },
   |

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0109, E0214, E0412.
For more information about an error, try `rustc --explain E0109`.

Backtrace

error[E0412]: cannot find type `TSVariant` in this scope
  --> a.rs:10:48
   |
10 |         assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant(()))> $matcher = $expr { true } else { false },
   |                                                ^^^^^^^^^ not found in this scope
...
16 |     is_variant!(UVariant, AliasFixed::UVariant);
   |     ------------------------------------------- in this macro invocation
   |
   = note: this error originates in the macro `is_variant` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0214]: parenthesized type parameters may only be used with a `Fn` trait
  --> a.rs:10:71
   |
10 |         assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant(()))> $matcher = $expr { true } else { false },
   |                                                                       ^^^^^^^^^^^^^ only `Fn` traits may use parentheses
...
16 |     is_variant!(UVariant, AliasFixed::UVariant);
   |     ------------------------------------------- in this macro invocation
   |
   = note: this error originates in the macro `is_variant` (in Nightly builds, run with -Z macro-backtrace for more info)
help: use angle brackets instead
   |
10 |         assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant<()>)> $matcher = $expr { true } else { false },
   |                                                                                ~  ~

thread 'rustc' panicked at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic.rs:642:9:
assertion `left == right` failed: suggestion must not have overlapping parts
  left: Some([SubstitutionPart { span: a.rs:8:59: 10:86 (#4), snippet: "" }, SubstitutionPart { span: a.rs:10:34: 10:34 (#5), snippet: ", {}, $expr));\n    (@check $variant:ident, $matcher:tt, $expr:expr) => (\n        assert!(if let AliasFixed::$variant::<(TSVariant, Enum::<()>::TSVariant(()))>" }])
 right: None
stack backtrace:
   0:     0x7fa13fd24e82 - std::backtrace_rs::backtrace::libunwind::trace::h20e1d55977458f85
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fa13fd24e82 - std::backtrace_rs::backtrace::trace_unsynchronized::h477756935e21eddd
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fa13fd24e82 - std::sys_common::backtrace::_print_fmt::h8d7cfccc0aa7e0a6
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:67:5
   3:     0x7fa13fd24e82 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h6d6c798a88c3c0a3
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7fa13fdad32f - core::fmt::rt::Argument::fmt::h7c0abaa263c1a6d5
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/rt.rs:142:9
   5:     0x7fa13fdad32f - core::fmt::write::h7c6fa3986b639831
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/mod.rs:1116:17
   6:     0x7fa13fd21e35 - std::io::Write::write_fmt::h9597fd225307c998
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/io/mod.rs:1763:15
   7:     0x7fa13fd24c54 - std::sys_common::backtrace::_print::h4fb69cb547ef0878
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7fa13fd24c54 - std::sys_common::backtrace::print::h3c19964e48771f0c
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7fa13fd110cc - std::panicking::default_hook::{{closure}}::h01c06bc296bdd31c
  10:     0x7fa13fd10d71 - std::panicking::default_hook::h27c789c492c45dbd
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:292:9
  11:     0x7fa142863699 - rustc_driver_impl[9a86a90e19736c7b]::install_ice_hook::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:1348:17
  12:     0x7fa142863699 - <alloc[7c6619a74188b8e7]::boxed::Box<rustc_driver_impl[9a86a90e19736c7b]::install_ice_hook::{closure#0}> as core[21dd56430bf6a4c3]::ops::function::Fn<(&dyn for<'a, 'b> core[21dd56430bf6a4c3]::ops::function::Fn<(&'a core[21dd56430bf6a4c3]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[21dd56430bf6a4c3]::marker::Sync + core[21dd56430bf6a4c3]::marker::Send, &core[21dd56430bf6a4c3]::panic::panic_info::PanicInfo)>>::call
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2021:9
  13:     0x7fa13fd11967 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h91ec1c7fe87a3318
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:2021:9
  14:     0x7fa13fd11967 - std::panicking::rust_panic_with_hook::hf02fcf8fdf0d7cc7
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:735:13
  15:     0x7fa13fd25351 - std::panicking::begin_panic_handler::{{closure}}::h120d23ce775301a7
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:609:13
  16:     0x7fa13fd25146 - std::sys_common::backtrace::__rust_end_short_backtrace::h451aa61ea3313d98
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:170:18
  17:     0x7fa13fd114a2 - rust_begin_unwind
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:597:5
  18:     0x7fa13fdc7185 - core::panicking::panic_fmt::h9be85dd9111718f1
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:72:14
  19:     0x7fa13fdc787b - core::panicking::assert_failed_inner::hcd4954d27e4a1b16
  20:     0x7fa142d19b1f - core[21dd56430bf6a4c3]::panicking::assert_failed::<core[21dd56430bf6a4c3]::option::Option<&[rustc_errors[6a8e8d45788746f]::SubstitutionPart; 2usize]>, core[21dd56430bf6a4c3]::option::Option<&[rustc_errors[6a8e8d45788746f]::SubstitutionPart; 2usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:280:5
  21:     0x7fa142b9f58c - <rustc_errors[6a8e8d45788746f]::diagnostic::Diagnostic>::multipart_suggestion_with_style::<alloc[7c6619a74188b8e7]::string::String>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic.rs:642:9
  22:     0x7fa142d0f30d - <rustc_errors[6a8e8d45788746f]::diagnostic::Diagnostic>::multipart_suggestion_verbose::<alloc[7c6619a74188b8e7]::string::String>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_errors/src/diagnostic.rs:614:9
  23:     0x7fa142d0f30d - <dyn rustc_hir_analysis[a4464cf92861975c]::astconv::AstConv>::associated_path_to_ty::{closure#0}::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_analysis/src/astconv/mod.rs:1352:33
  24:     0x7fa142d0f30d - <dyn rustc_hir_analysis[a4464cf92861975c]::astconv::AstConv>::prohibit_generics::<core[21dd56430bf6a4c3]::slice::iter::Iter<rustc_hir[ad99a2c62ee065e0]::hir::PathSegment>, <dyn rustc_hir_analysis[a4464cf92861975c]::astconv::AstConv>::associated_path_to_ty::{closure#0}::{closure#1}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_analysis/src/astconv/mod.rs:1988:13
  25:     0x7fa142d0f30d - <dyn rustc_hir_analysis[a4464cf92861975c]::astconv::AstConv>::associated_path_to_ty::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_analysis/src/astconv/mod.rs:1267:25
  26:     0x7fa142d0352f - <dyn rustc_hir_analysis[a4464cf92861975c]::astconv::AstConv>::associated_path_to_ty
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_analysis/src/astconv/mod.rs:1238:5
  27:     0x7fa142e3597a - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::finish_resolving_struct_path
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1822:30
  28:     0x7fa142e3597a - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_struct_path
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1359:25
  29:     0x7fa142eb3446 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_pat_struct
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/pat.rs:854:39
  30:     0x7fa142eb3446 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_pat
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/pat.rs:191:17
  31:     0x7fa142e3683f - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_pat_top
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/pat.rs:155:9
  32:     0x7fa142e3683f - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_decl
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1477:9
  33:     0x7fa142e8f39d - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_let
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:1210:9
  34:     0x7fa142e8f39d - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:316:40
  35:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:228:18
  36:     0x7fa142e09960 - stacker[e84c0ac142b46db]::maybe_grow::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  37:     0x7fa142e09960 - rustc_data_structures[e7d5d0ee59919296]::stack::ensure_sufficient_stack::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  38:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:224:18
  39:     0x7fa142e8e8da - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:178:9
  40:     0x7fa142e8fa63 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_has_type_or_error::<<rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_then_else::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:71:22
  41:     0x7fa142e8fa63 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_then_else
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:1018:23
  42:     0x7fa142e8fa63 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:337:17
  43:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:228:18
  44:     0x7fa142e09960 - stacker[e84c0ac142b46db]::maybe_grow::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  45:     0x7fa142e09960 - rustc_data_structures[e7d5d0ee59919296]::stack::ensure_sufficient_stack::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  46:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:224:18
  47:     0x7fa142e8e8da - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:178:9
  48:     0x7fa142e90f7f - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_unary
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:370:27
  49:     0x7fa142e90f7f - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:287:45
  50:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:228:18
  51:     0x7fa142e09960 - stacker[e84c0ac142b46db]::maybe_grow::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  52:     0x7fa142e09960 - rustc_data_structures[e7d5d0ee59919296]::stack::ensure_sufficient_stack::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  53:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:224:18
  54:     0x7fa142e8e8da - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:178:9
  55:     0x7fa142e8ffab - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:339:39
  56:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:228:18
  57:     0x7fa142e09960 - stacker[e84c0ac142b46db]::maybe_grow::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  58:     0x7fa142e09960 - rustc_data_structures[e7d5d0ee59919296]::stack::ensure_sufficient_stack::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  59:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:224:18
  60:     0x7fa142e8e8da - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:178:9
  61:     0x7fa142e8fa63 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_has_type_or_error::<<rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_then_else::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:71:22
  62:     0x7fa142e8fa63 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_then_else
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:1018:23
  63:     0x7fa142e8fa63 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:337:17
  64:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:228:18
  65:     0x7fa142e09960 - stacker[e84c0ac142b46db]::maybe_grow::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  66:     0x7fa142e09960 - rustc_data_structures[e7d5d0ee59919296]::stack::ensure_sufficient_stack::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  67:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:224:18
  68:     0x7fa142e8e8da - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:178:9
  69:     0x7fa142e36d24 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:151:9
  70:     0x7fa142e36d24 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_stmt
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1526:17
  71:     0x7fa142e3747d - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_block_with_expected::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1578:17
  72:     0x7fa142e3747d - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::with_breakable_ctxt::<<rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_block_with_expected::{closure#0}, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/_impl.rs:1527:22
  73:     0x7fa142e3747d - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_block_with_expected
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/fn_ctxt/checks.rs:1576:26
  74:     0x7fa142e8f8c9 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_kind
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:324:41
  75:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:228:18
  76:     0x7fa142e09960 - stacker[e84c0ac142b46db]::maybe_grow::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  77:     0x7fa142e09960 - rustc_data_structures[e7d5d0ee59919296]::stack::ensure_sufficient_stack::<rustc_middle[209d3c4051728f5e]::ty::Ty, <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  78:     0x7fa142e09960 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:224:18
  79:     0x7fa142e8e8da - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_expectation
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:178:9
  80:     0x7fa142e0b410 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_expr_with_hint
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:130:9
  81:     0x7fa142e0b410 - <rustc_hir_typeck[f8bdffb408d1dd91]::fn_ctxt::FnCtxt>::check_return_expr
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/expr.rs:821:30
  82:     0x7fa14309faea - rustc_hir_typeck[f8bdffb408d1dd91]::check::check_fn
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/check.rs:121:5
  83:     0x7fa14309a909 - rustc_hir_typeck[f8bdffb408d1dd91]::typeck_with_fallback::<rustc_hir_typeck[f8bdffb408d1dd91]::typeck::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/lib.rs:200:9
  84:     0x7fa14309a909 - rustc_hir_typeck[f8bdffb408d1dd91]::typeck_with_fallback::<rustc_hir_typeck[f8bdffb408d1dd91]::typeck::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/lib.rs:159:1
  85:     0x7fa14309a909 - rustc_hir_typeck[f8bdffb408d1dd91]::typeck
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_typeck/src/lib.rs:146:5
  86:     0x7fa144469e83 - rustc_query_impl[dc87cdf6e038fb5a]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:585:47
  87:     0x7fa144469e83 - rustc_query_impl[dc87cdf6e038fb5a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[dc87cdf6e038fb5a]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:509:18
  88:     0x7fa14474b3cd - rustc_query_impl[dc87cdf6e038fb5a]::query_impl::typeck::dynamic_query::{closure#2}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:581:25
  89:     0x7fa14474b3cd - <rustc_query_impl[dc87cdf6e038fb5a]::query_impl::typeck::dynamic_query::{closure#2} as core[21dd56430bf6a4c3]::ops::function::FnOnce<(rustc_middle[209d3c4051728f5e]::ty::context::TyCtxt, rustc_span[a94a85dbff5811f1]::def_id::LocalDefId)>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ops/function.rs:250:5
  90:     0x7fa144400cd2 - <rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false> as rustc_query_system[12eae60210ea368c]::query::config::QueryConfig<rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>>::compute
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/lib.rs:117:9
  91:     0x7fa144400cd2 - rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr::<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:456:72
  92:     0x7fa144400cd2 - rustc_middle[209d3c4051728f5e]::ty::context::tls::enter_context::<rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  93:     0x7fa144400cd2 - <std[4c86c792f832264]::thread::local::LocalKey<core[21dd56430bf6a4c3]::cell::Cell<*const ()>>>::try_with::<rustc_middle[209d3c4051728f5e]::ty::context::tls::enter_context<rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:270:16
  94:     0x7fa144400cd2 - <std[4c86c792f832264]::thread::local::LocalKey<core[21dd56430bf6a4c3]::cell::Cell<*const ()>>>::with::<rustc_middle[209d3c4051728f5e]::ty::context::tls::enter_context<rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:246:9
  95:     0x7fa144400cd2 - rustc_middle[209d3c4051728f5e]::ty::context::tls::enter_context::<rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  96:     0x7fa144400cd2 - <rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt as rustc_query_system[12eae60210ea368c]::query::QueryContext>::start_query::<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:151:13
  97:     0x7fa144400cd2 - rustc_middle[209d3c4051728f5e]::ty::context::tls::with_related_context::<<rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt as rustc_query_system[12eae60210ea368c]::query::QueryContext>::start_query<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  98:     0x7fa144400cd2 - rustc_middle[209d3c4051728f5e]::ty::context::tls::with_context::<rustc_middle[209d3c4051728f5e]::ty::context::tls::with_related_context<<rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt as rustc_query_system[12eae60210ea368c]::query::QueryContext>::start_query<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  99:     0x7fa144400cd2 - rustc_middle[209d3c4051728f5e]::ty::context::tls::with_context_opt::<rustc_middle[209d3c4051728f5e]::ty::context::tls::with_context<rustc_middle[209d3c4051728f5e]::ty::context::tls::with_related_context<<rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt as rustc_query_system[12eae60210ea368c]::query::QueryContext>::start_query<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:100:18
 100:     0x7fa144400cd2 - rustc_middle[209d3c4051728f5e]::ty::context::tls::with_context::<rustc_middle[209d3c4051728f5e]::ty::context::tls::with_related_context<<rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt as rustc_query_system[12eae60210ea368c]::query::QueryContext>::start_query<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:5
 101:     0x7fa144400cd2 - rustc_middle[209d3c4051728f5e]::ty::context::tls::with_related_context::<<rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt as rustc_query_system[12eae60210ea368c]::query::QueryContext>::start_query<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:124:5
 102:     0x7fa144400cd2 - <rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt as rustc_query_system[12eae60210ea368c]::query::QueryContext>::start_query::<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:136:9
 103:     0x7fa144400cd2 - rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr::<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:456:18
 104:     0x7fa144400cd2 - rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job::<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt, false>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:389:9
 105:     0x7fa144400cd2 - rustc_query_system[12eae60210ea368c]::query::plumbing::try_execute_query::<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt, false>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:332:13
 106:     0x7fa1446c4326 - rustc_query_system[12eae60210ea368c]::query::plumbing::get_query_non_incr::<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:786:32
 107:     0x7fa1446c4326 - stacker[e84c0ac142b46db]::maybe_grow::<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[12eae60210ea368c]::query::plumbing::get_query_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
 108:     0x7fa1446c4326 - rustc_data_structures[e7d5d0ee59919296]::stack::ensure_sufficient_stack::<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[12eae60210ea368c]::query::plumbing::get_query_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
 109:     0x7fa1446c4326 - rustc_query_system[12eae60210ea368c]::query::plumbing::get_query_non_incr::<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:786:5
 110:     0x7fa1446c4326 - rustc_query_impl[dc87cdf6e038fb5a]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:559:26
 111:     0x7fa142bc7f1d - rustc_middle[209d3c4051728f5e]::query::plumbing::query_ensure::<rustc_query_system[12eae60210ea368c]::query::caches::VecCache<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 8usize]>>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/query/plumbing.rs:172:9
 112:     0x7fa142bc7f1d - <rustc_middle[209d3c4051728f5e]::query::plumbing::TyCtxtEnsure>::typeck::<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/query/plumbing.rs:347:17
 113:     0x7fa142bc7f1d - rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_analysis/src/lib.rs:227:13
 114:     0x7fa142bc7f1d - <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/hir/map/mod.rs:491:82
 115:     0x7fa142bc7f1d - rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in::<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/sync/parallel.rs:75:30
 116:     0x7fa142bc7f1d - <core[21dd56430bf6a4c3]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}::{closure#0}::{closure#0}> as core[21dd56430bf6a4c3]::ops::function::FnOnce<()>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panic/unwind_safe.rs:271:9
 117:     0x7fa142c9098b - std[4c86c792f832264]::panicking::try::do_call::<core[21dd56430bf6a4c3]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}::{closure#0}::{closure#0}>, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:504:40
 118:     0x7fa142c9098b - std[4c86c792f832264]::panicking::try::<(), core[21dd56430bf6a4c3]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}::{closure#0}::{closure#0}>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:468:19
 119:     0x7fa142c9098b - std[4c86c792f832264]::panic::catch_unwind::<core[21dd56430bf6a4c3]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}::{closure#0}::{closure#0}>, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panic.rs:142:14
 120:     0x7fa142c9098b - <rustc_data_structures[e7d5d0ee59919296]::sync::parallel::ParallelGuard>::run::<(), rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}::{closure#0}::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
 121:     0x7fa142c9098b - rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in::<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/sync/parallel.rs:75:17
 122:     0x7fa142c9098b - <core[21dd56430bf6a4c3]::slice::iter::Iter<rustc_span[a94a85dbff5811f1]::def_id::LocalDefId> as core[21dd56430bf6a4c3]::iter::traits::iterator::Iterator>::for_each::<rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/slice/iter/macros.rs:254:21
 123:     0x7fa142c9098b - rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in::<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/sync/parallel.rs:74:13
 124:     0x7fa142c9098b - rustc_data_structures[e7d5d0ee59919296]::sync::parallel::parallel_guard::<(), rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
 125:     0x7fa142c9098b - rustc_data_structures[e7d5d0ee59919296]::sync::parallel::disabled::par_for_each_in::<&[rustc_span[a94a85dbff5811f1]::def_id::LocalDefId], <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/sync/parallel.rs:73:9
 126:     0x7fa142d9b286 - <rustc_middle[209d3c4051728f5e]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[a4464cf92861975c]::check_crate::{closure#7}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/hir/map/mod.rs:491:9
 127:     0x7fa142d9b286 - rustc_hir_analysis[a4464cf92861975c]::check_crate
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_hir_analysis/src/lib.rs:224:5
 128:     0x7fa1433e2540 - rustc_interface[100b8cd82d9dd990]::passes::analysis
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_interface/src/passes.rs:775:5
 129:     0x7fa14446a431 - rustc_query_impl[dc87cdf6e038fb5a]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:585:47
 130:     0x7fa14446a431 - rustc_query_impl[dc87cdf6e038fb5a]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[dc87cdf6e038fb5a]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 1usize]>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:509:18
 131:     0x7fa1447bff59 - rustc_query_impl[dc87cdf6e038fb5a]::query_impl::analysis::dynamic_query::{closure#2}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:581:25
 132:     0x7fa1447bff59 - <rustc_query_impl[dc87cdf6e038fb5a]::query_impl::analysis::dynamic_query::{closure#2} as core[21dd56430bf6a4c3]::ops::function::FnOnce<(rustc_middle[209d3c4051728f5e]::ty::context::TyCtxt, ())>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/ops/function.rs:250:5
 133:     0x7fa144373005 - <rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::SingleCache<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 1usize]>>, false, false, false> as rustc_query_system[12eae60210ea368c]::query::config::QueryConfig<rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>>::compute
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/lib.rs:117:9
 134:     0x7fa144373005 - rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr::<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::SingleCache<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:456:72
 135:     0x7fa144373005 - rustc_middle[209d3c4051728f5e]::ty::context::tls::enter_context::<rustc_query_system[12eae60210ea368c]::query::plumbing::execute_job_non_incr<rustc_query_impl[dc87cdf6e038fb5a]::DynamicConfig<rustc_query_system[12eae60210ea368c]::query::caches::SingleCache<rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[dc87cdf6e038fb5a]::plumbing::QueryCtxt>::{closure#0}, rustc_middle[209d3c4051728f5e]::query::erase::Erased<[u8; 1usize]>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:82:9

......

error: 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: please attach the file at `/tmp/O/rustc-ice-2023-10-06T04:38:22.719740215Z-2498356.txt` to your bug report

query stack during panic:
#0 [typeck] type-checking `main`
#1 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 2 previous errors

Some errors have detailed explanations: E0214, E0412.
For more information about an error, try `rustc --explain E0214`

[matthiaskrgr]

the problem is probably line 8 of the suggestion?

[gurry]

@rustbot claim

[gurry]

Minimized a bit more:

enum Enum<T> {  SVariant { _v: T }, UVariant }

type AliasFixed = Enum<()>;

macro_rules! test {
    () => (test!(UVariant));
    ($variant:ident) => (if let AliasFixed::$variant::<3> {} = 5 { true } else { false });
}

fn main() {
    test!();
}

The issue occurs because we compute a wrong span for the args ::<3>. Instead of this:

macro_rules! test {
    () => (test!(UVariant));
    ($variant:ident) => (if let AliasFixed::$variant::<3> {} = 5 { true } else { false });
                                                    ^^^^^
}

it spans the entire distance from the end of UVariant in the first line to the end of ::<3> in the next line:

macro_rules! test {
    () => (test!(UVariant));
        Span starts here^
    ($variant:ident) => (if let AliasFixed::$variant::<3> {} = 5 { true } else { false });
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^Span ends here
}

The reasons for this is that we compute the span starting from the end of the variant path segment (UVariant in this case) to end of the args (the right angle bracket of of <3>). Normally it works, but leads to the above miscalculation when the variant and the args reside in different macros or expansions as in the present case.

The offending source code doing the span computation is this:

rust/compiler/rustc_hir_analysis/src/astconv/mod.rs

Lines 1278 to 1279 in 1e3c8f1

	let args_span =
	assoc_segment.ident.span.shrink_to_hi().to(args.span_ext);