Closed
Description
Code
fn main() {
let x: &[i32] = &[1, 2, 3];
let c = || match *x {
[_] => 1,
[_, _] => 2,
[_, _, _] => 3,
_ => 10,
};
println!("{}", core::mem::size_of_val(&c))
}Error output
Compiling playground v0.0.1 (/playground)
thread 'rustc' panicked at 'called `Option::unwrap()` on a `None` value', compiler/rustc_mir_build/src/build/expr/as_place.rs:256:31
stack backtrace:
0: 0x7fac59f186f1 - std::backtrace_rs::backtrace::libunwind::trace::ha0547a5335ba6eb8
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x7fac59f186f1 - std::backtrace_rs::backtrace::trace_unsynchronized::h597700f2649fb43a
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7fac59f186f1 - std::sys_common::backtrace::_print_fmt::ha306a728a864b1ec
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/sys_common/backtrace.rs:65:5
3: 0x7fac59f186f1 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h60926fa2ed907188
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7fac59f78bef - core::fmt::rt::Argument::fmt::hbfab9f7ca3ec46a1
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/core/src/fmt/rt.rs:138:9
5: 0x7fac59f78bef - core::fmt::write::he942607094ccdb30
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/core/src/fmt/mod.rs:1094:21
6: 0x7fac59f0b9f1 - std::io::Write::write_fmt::hf8f718f51475564f
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/io/mod.rs:1712:15
7: 0x7fac59f18505 - std::sys_common::backtrace::_print::h069f307f286f01b8
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/sys_common/backtrace.rs:47:5
8: 0x7fac59f18505 - std::sys_common::backtrace::print::h3024c4761bf76173
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/sys_common/backtrace.rs:34:9
9: 0x7fac59f1b177 - std::panicking::default_hook::{{closure}}::h32ba135d303524b9
10: 0x7fac59f1af64 - std::panicking::default_hook::hd5920ecdc023cc57
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/panicking.rs:288:9
11: 0x7fac5d08238b - rustc_driver_impl[11297d21f3442eb3]::install_ice_hook::{closure#0}
12: 0x7fac59f1b897 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h50fbac85275e3d54
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/alloc/src/boxed.rs:1999:9
13: 0x7fac59f1b897 - std::panicking::rust_panic_with_hook::h904e506787ae7ee1
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/panicking.rs:695:13
14: 0x7fac59f1b5d1 - std::panicking::begin_panic_handler::{{closure}}::h5222fe796d39ff56
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/panicking.rs:580:13
15: 0x7fac59f18b26 - std::sys_common::backtrace::__rust_end_short_backtrace::h7a1e0e290e329ce5
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/sys_common/backtrace.rs:151:18
16: 0x7fac59f1b382 - rust_begin_unwind
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/panicking.rs:578:5
17: 0x7fac59f74e73 - core::panicking::panic_fmt::hbfb35e1471f52240
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/core/src/panicking.rs:67:14
18: 0x7fac59f74f03 - core::panicking::panic::hb25bd1777f71c0c7
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/core/src/panicking.rs:117:5
19: 0x7fac5b398eb4 - <rustc_mir_build[598a76b9bbba6696]::build::expr::as_place::PlaceBuilder>::to_place
20: 0x7fac5c289c96 - <rustc_mir_build[598a76b9bbba6696]::build::Builder>::match_simplified_candidates
21: 0x7fac5c292745 - <rustc_mir_build[598a76b9bbba6696]::build::Builder>::match_candidates
22: 0x7fac5b3a1d97 - <rustc_mir_build[598a76b9bbba6696]::build::Builder>::lower_match_tree
23: 0x7fac5b38e507 - <rustc_mir_build[598a76b9bbba6696]::build::Builder>::expr_into_dest
24: 0x7fac5b38c106 - <rustc_mir_build[598a76b9bbba6696]::build::Builder>::expr_into_dest
25: 0x7fac5b38c106 - <rustc_mir_build[598a76b9bbba6696]::build::Builder>::expr_into_dest
26: 0x7fac5be72c6d - rustc_mir_build[598a76b9bbba6696]::build::mir_built
27: 0x7fac5b14247c - rustc_query_impl[c44f9c9108d77c0f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::mir_built::{closure#2}::{closure#0}, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>
28: 0x7fac5b14245e - <rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::mir_built::{closure#2} as core[4434429b7305d0b8]::ops::function::FnOnce<(rustc_middle[4996dda2e843c480]::ty::context::TyCtxt, rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId)>>::call_once
29: 0x7fac5b236280 - rustc_query_system[af5f8ea193900a95]::query::plumbing::try_execute_query::<rustc_query_impl[c44f9c9108d77c0f]::DynamicConfig<rustc_query_system[af5f8ea193900a95]::query::caches::VecCache<rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[c44f9c9108d77c0f]::plumbing::QueryCtxt, false>
30: 0x7fac5ca48081 - rustc_query_impl[c44f9c9108d77c0f]::get_query_non_incr::mir_built::__rust_end_short_backtrace
31: 0x7fac5c0e08a3 - rustc_mir_transform[969ccd5cf54731df]::check_unsafety::unsafety_check_result
32: 0x7fac5b1424bc - rustc_query_impl[c44f9c9108d77c0f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::unsafety_check_result::{closure#2}::{closure#0}, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>
33: 0x7fac5b14249e - <rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::unsafety_check_result::{closure#2} as core[4434429b7305d0b8]::ops::function::FnOnce<(rustc_middle[4996dda2e843c480]::ty::context::TyCtxt, rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId)>>::call_once
34: 0x7fac5b236280 - rustc_query_system[af5f8ea193900a95]::query::plumbing::try_execute_query::<rustc_query_impl[c44f9c9108d77c0f]::DynamicConfig<rustc_query_system[af5f8ea193900a95]::query::caches::VecCache<rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[c44f9c9108d77c0f]::plumbing::QueryCtxt, false>
35: 0x7fac5ca49f31 - rustc_query_impl[c44f9c9108d77c0f]::get_query_non_incr::unsafety_check_result::__rust_end_short_backtrace
36: 0x7fac5c0e3952 - rustc_mir_transform[969ccd5cf54731df]::check_unsafety::unsafety_check_result
37: 0x7fac5b1424bc - rustc_query_impl[c44f9c9108d77c0f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::unsafety_check_result::{closure#2}::{closure#0}, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>
38: 0x7fac5b14249e - <rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::unsafety_check_result::{closure#2} as core[4434429b7305d0b8]::ops::function::FnOnce<(rustc_middle[4996dda2e843c480]::ty::context::TyCtxt, rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId)>>::call_once
39: 0x7fac5b236280 - rustc_query_system[af5f8ea193900a95]::query::plumbing::try_execute_query::<rustc_query_impl[c44f9c9108d77c0f]::DynamicConfig<rustc_query_system[af5f8ea193900a95]::query::caches::VecCache<rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[c44f9c9108d77c0f]::plumbing::QueryCtxt, false>
40: 0x7fac5ca49f31 - rustc_query_impl[c44f9c9108d77c0f]::get_query_non_incr::unsafety_check_result::__rust_end_short_backtrace
41: 0x7fac5c44aff5 - rustc_mir_transform[969ccd5cf54731df]::mir_const
42: 0x7fac5b17793e - rustc_query_impl[c44f9c9108d77c0f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::mir_const::{closure#2}::{closure#0}, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>
43: 0x7fac5b17790e - <rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::mir_const::{closure#2} as core[4434429b7305d0b8]::ops::function::FnOnce<(rustc_middle[4996dda2e843c480]::ty::context::TyCtxt, rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId)>>::call_once
44: 0x7fac5b236280 - rustc_query_system[af5f8ea193900a95]::query::plumbing::try_execute_query::<rustc_query_impl[c44f9c9108d77c0f]::DynamicConfig<rustc_query_system[af5f8ea193900a95]::query::caches::VecCache<rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[c44f9c9108d77c0f]::plumbing::QueryCtxt, false>
45: 0x7fac5ca48181 - rustc_query_impl[c44f9c9108d77c0f]::get_query_non_incr::mir_const::__rust_end_short_backtrace
46: 0x7fac5be9a97b - rustc_mir_transform[969ccd5cf54731df]::mir_promoted
47: 0x7fac5b13d15f - rustc_query_impl[c44f9c9108d77c0f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::mir_promoted::{closure#2}::{closure#0}, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 16usize]>>
48: 0x7fac5b99d698 - rustc_query_system[af5f8ea193900a95]::query::plumbing::try_execute_query::<rustc_query_impl[c44f9c9108d77c0f]::DynamicConfig<rustc_query_system[af5f8ea193900a95]::query::caches::VecCache<rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[c44f9c9108d77c0f]::plumbing::QueryCtxt, false>
49: 0x7fac5ca485c7 - rustc_query_impl[c44f9c9108d77c0f]::get_query_non_incr::mir_promoted::__rust_end_short_backtrace
50: 0x7fac5bf86b0c - rustc_borrowck[87d11f0aa57bf078]::mir_borrowck
51: 0x7fac5b1778de - rustc_query_impl[c44f9c9108d77c0f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::mir_borrowck::{closure#2}::{closure#0}, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>
52: 0x7fac5b1778ae - <rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::mir_borrowck::{closure#2} as core[4434429b7305d0b8]::ops::function::FnOnce<(rustc_middle[4996dda2e843c480]::ty::context::TyCtxt, rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId)>>::call_once
53: 0x7fac5b236280 - rustc_query_system[af5f8ea193900a95]::query::plumbing::try_execute_query::<rustc_query_impl[c44f9c9108d77c0f]::DynamicConfig<rustc_query_system[af5f8ea193900a95]::query::caches::VecCache<rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[c44f9c9108d77c0f]::plumbing::QueryCtxt, false>
54: 0x7fac5ca4a381 - rustc_query_impl[c44f9c9108d77c0f]::get_query_non_incr::mir_borrowck::__rust_end_short_backtrace
55: 0x7fac5c59b67e - rustc_data_structures[b08b489b4cdf5f63]::sync::par_for_each_in::<&[rustc_span[ee77a0ef2703f5aa]::def_id::LocalDefId], <rustc_middle[4996dda2e843c480]::hir::map::Map>::par_body_owners<rustc_interface[bf9d7b52826e2146]::passes::analysis::{closure#1}::{closure#0}>::{closure#0}>
56: 0x7fac5c59b396 - <rustc_session[81c0ead03495bb02]::session::Session>::time::<(), rustc_interface[bf9d7b52826e2146]::passes::analysis::{closure#1}>
57: 0x7fac5c59ad9f - rustc_interface[bf9d7b52826e2146]::passes::analysis
58: 0x7fac5c5c59fa - rustc_query_impl[c44f9c9108d77c0f]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::analysis::{closure#2}::{closure#0}, rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 1usize]>>
59: 0x7fac5c5c59e9 - <rustc_query_impl[c44f9c9108d77c0f]::dynamic_query::analysis::{closure#2} as core[4434429b7305d0b8]::ops::function::FnOnce<(rustc_middle[4996dda2e843c480]::ty::context::TyCtxt, ())>>::call_once
60: 0x7fac5c791e64 - rustc_query_system[af5f8ea193900a95]::query::plumbing::try_execute_query::<rustc_query_impl[c44f9c9108d77c0f]::DynamicConfig<rustc_query_system[af5f8ea193900a95]::query::caches::SingleCache<rustc_middle[4996dda2e843c480]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[c44f9c9108d77c0f]::plumbing::QueryCtxt, false>
61: 0x7fac5c791c49 - rustc_query_impl[c44f9c9108d77c0f]::get_query_non_incr::analysis::__rust_end_short_backtrace
62: 0x7fac5c764eef - <rustc_middle[4996dda2e843c480]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[11297d21f3442eb3]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[4434429b7305d0b8]::result::Result<(), rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>>
63: 0x7fac5c316ecf - <rustc_interface[bf9d7b52826e2146]::interface::Compiler>::enter::<rustc_driver_impl[11297d21f3442eb3]::run_compiler::{closure#1}::{closure#2}, core[4434429b7305d0b8]::result::Result<core[4434429b7305d0b8]::option::Option<rustc_interface[bf9d7b52826e2146]::queries::Linker>, rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>>
64: 0x7fac5c314bfd - <scoped_tls[32a73cfd30817de0]::ScopedKey<rustc_span[ee77a0ef2703f5aa]::SessionGlobals>>::set::<rustc_interface[bf9d7b52826e2146]::interface::run_compiler<core[4434429b7305d0b8]::result::Result<(), rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>, rustc_driver_impl[11297d21f3442eb3]::run_compiler::{closure#1}>::{closure#0}, core[4434429b7305d0b8]::result::Result<(), rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>>
65: 0x7fac5c314056 - std[bc266c592f396f35]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[bf9d7b52826e2146]::util::run_in_thread_pool_with_globals<rustc_interface[bf9d7b52826e2146]::interface::run_compiler<core[4434429b7305d0b8]::result::Result<(), rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>, rustc_driver_impl[11297d21f3442eb3]::run_compiler::{closure#1}>::{closure#0}, core[4434429b7305d0b8]::result::Result<(), rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[4434429b7305d0b8]::result::Result<(), rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>>
66: 0x7fac5c943265 - <<std[bc266c592f396f35]::thread::Builder>::spawn_unchecked_<rustc_interface[bf9d7b52826e2146]::util::run_in_thread_pool_with_globals<rustc_interface[bf9d7b52826e2146]::interface::run_compiler<core[4434429b7305d0b8]::result::Result<(), rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>, rustc_driver_impl[11297d21f3442eb3]::run_compiler::{closure#1}>::{closure#0}, core[4434429b7305d0b8]::result::Result<(), rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[4434429b7305d0b8]::result::Result<(), rustc_span[ee77a0ef2703f5aa]::ErrorGuaranteed>>::{closure#1} as core[4434429b7305d0b8]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
67: 0x7fac59f25d45 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h284ea0362d17b1a9
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/alloc/src/boxed.rs:1985:9
68: 0x7fac59f25d45 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h4cdb6c0705a7967c
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/alloc/src/boxed.rs:1985:9
69: 0x7fac59f25d45 - std::sys::unix::thread::Thread::new::thread_start::hca4af62dde160e36
at /rustc/d3f416dc063fc478c7250873246cb2d4136d8c42/library/std/src/sys/unix/thread.rs:108:17
70: 0x7fac59df5609 - start_thread
71: 0x7fac59d18133 - clone
72: 0x0 - <unknown>
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: rustc 1.71.0-nightly (d3f416dc0 2023-05-18) 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 [mir_built] building MIR for `main::{closure#0}`
#1 [unsafety_check_result] unsafety-checking `main::{closure#0}`
#2 [unsafety_check_result] unsafety-checking `main`
#3 [mir_const] preparing `main` for borrow checking
#4 [mir_promoted] promoting constants in MIR for `main`
#5 [mir_borrowck] borrow-checking `main`
#6 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `playground` (bin "playground")