ICE: expected wide pointer extra data (e.g. slice length or trait object vtable)

[matthiaskrgr]

snippet:

struct Foo(<&[fn()] as ::core::ops::Deref>::Target);
const _: *const Foo = 0 as _;

Version information

rustc 1.79.0-nightly (290d79241 2024-04-22)
binary: rustc
commit-hash: 290d792411566c94273e5d1a980a1ab91f1d950b
commit-date: 2024-04-22
host: x86_64-unknown-linux-gnu
release: 1.79.0-nightly
LLVM version: 18.1.4

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc --edition=2021

Program output

error[E0106]: missing lifetime specifier
 --> /tmp/icemaker_global_tempdir.1nBNEtZmd8hU/rustc_testrunner_tmpdir_reporting.YScR49rloxcZ/mvce.rs:1:13
  |
1 | struct Foo(<&[fn()] as ::core::ops::Deref>::Target);
  |             ^ expected named lifetime parameter
  |
help: consider introducing a named lifetime parameter
  |
1 | struct Foo<'a>(<&'a [fn()] as ::core::ops::Deref>::Target);
  |           ++++   ++

error[E0601]: `main` function not found in crate `mvce`
 --> /tmp/icemaker_global_tempdir.1nBNEtZmd8hU/rustc_testrunner_tmpdir_reporting.YScR49rloxcZ/mvce.rs:2:30
  |
2 | const _: *const Foo = 0 as _;
  |                              ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.1nBNEtZmd8hU/rustc_testrunner_tmpdir_reporting.YScR49rloxcZ/mvce.rs`

error: internal compiler error: compiler/rustc_const_eval/src/interpret/place.rs:37:17: expected wide pointer extra data (e.g. slice length or trait object vtable)

thread 'rustc' panicked at compiler/rustc_const_eval/src/interpret/place.rs:37:17:
Box<dyn Any>
stack backtrace:
   0:     0x7d2e63191935 - std::backtrace_rs::backtrace::libunwind::trace::h26e1fa40e8cb8736
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x7d2e63191935 - std::backtrace_rs::backtrace::trace_unsynchronized::h859af531c2f619a1
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7d2e63191935 - std::sys_common::backtrace::_print_fmt::h770ada6f33df9a23
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7d2e63191935 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1202620471ff2013
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7d2e631e0a6b - core::fmt::rt::Argument::fmt::h1d7f69a8f0bb037c
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/core/src/fmt/rt.rs:165:63
   5:     0x7d2e631e0a6b - core::fmt::write::h2cfd50c1c61a678b
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/core/src/fmt/mod.rs:1157:21
   6:     0x7d2e631864bf - std::io::Write::write_fmt::h68244818dfe9446a
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/io/mod.rs:1832:15
   7:     0x7d2e6319170e - std::sys_common::backtrace::_print::hb0df927864ffa3c4
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7d2e6319170e - std::sys_common::backtrace::print::hb29ea7496634044b
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7d2e63194079 - std::panicking::default_hook::{{closure}}::hcfcc8ff96a30a9c7
  10:     0x7d2e63193dbd - std::panicking::default_hook::h8bb790ee0d607409
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/panicking.rs:298:9
  11:     0x7d2e5fa3227c - std[37c8ccdab8a3c0d8]::panicking::update_hook::<alloc[34ed19a5ff888b12]::boxed::Box<rustc_driver_impl[480b09937bfb0708]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7d2e63194776 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h11842aeeeb09579f
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/alloc/src/boxed.rs:2036:9
  13:     0x7d2e63194776 - std::panicking::rust_panic_with_hook::h2039ccc53629d416
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/panicking.rs:799:13
  14:     0x7d2e5fa62584 - std[37c8ccdab8a3c0d8]::panicking::begin_panic::<rustc_errors[6444c462ca5918aa]::ExplicitBug>::{closure#0}
  15:     0x7d2e5fa5ef36 - std[37c8ccdab8a3c0d8]::sys_common::backtrace::__rust_end_short_backtrace::<std[37c8ccdab8a3c0d8]::panicking::begin_panic<rustc_errors[6444c462ca5918aa]::ExplicitBug>::{closure#0}, !>
  16:     0x7d2e5fa5a506 - std[37c8ccdab8a3c0d8]::panicking::begin_panic::<rustc_errors[6444c462ca5918aa]::ExplicitBug>
  17:     0x7d2e5fa6b801 - <rustc_errors[6444c462ca5918aa]::diagnostic::BugAbort as rustc_errors[6444c462ca5918aa]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  18:     0x7d2e5ff1155c - rustc_middle[d30f97e255128713]::util::bug::opt_span_bug_fmt::<rustc_span[128fa906eb8a1c67]::span_encoding::Span>::{closure#0}
  19:     0x7d2e5fef982a - rustc_middle[d30f97e255128713]::ty::context::tls::with_opt::<rustc_middle[d30f97e255128713]::util::bug::opt_span_bug_fmt<rustc_span[128fa906eb8a1c67]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  20:     0x7d2e5fef96cb - rustc_middle[d30f97e255128713]::ty::context::tls::with_context_opt::<rustc_middle[d30f97e255128713]::ty::context::tls::with_opt<rustc_middle[d30f97e255128713]::util::bug::opt_span_bug_fmt<rustc_span[128fa906eb8a1c67]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  21:     0x7d2e5e28fe70 - rustc_middle[d30f97e255128713]::util::bug::bug_fmt
  22:     0x7d2e5f9ef2ec - <rustc_const_eval[6d96b92d4bade795]::interpret::validity::ValidityVisitor<rustc_const_eval[6d96b92d4bade795]::const_eval::machine::CompileTimeInterpreter>>::check_wide_ptr_meta
  23:     0x7d2e60e6ecdd - <rustc_const_eval[6d96b92d4bade795]::interpret::validity::ValidityVisitor<rustc_const_eval[6d96b92d4bade795]::const_eval::machine::CompileTimeInterpreter> as rustc_const_eval[6d96b92d4bade795]::interpret::visitor::ValueVisitor<rustc_const_eval[6d96b92d4bade795]::const_eval::machine::CompileTimeInterpreter>>::visit_value
  24:     0x7d2e5ef85621 - rustc_const_eval[6d96b92d4bade795]::const_eval::eval_queries::eval_to_allocation_raw_provider
  25:     0x7d2e616b56b6 - rustc_query_impl[4316bc259f8ef16e]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[4316bc259f8ef16e]::query_impl::eval_to_allocation_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d30f97e255128713]::query::erase::Erased<[u8; 24usize]>>
  26:     0x7d2e616b4ed6 - rustc_query_system[8cff448a052401bd]::query::plumbing::try_execute_query::<rustc_query_impl[4316bc259f8ef16e]::DynamicConfig<rustc_query_system[8cff448a052401bd]::query::caches::DefaultCache<rustc_middle[d30f97e255128713]::ty::ParamEnvAnd<rustc_middle[d30f97e255128713]::mir::interpret::GlobalId>, rustc_middle[d30f97e255128713]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[4316bc259f8ef16e]::plumbing::QueryCtxt, false>
  27:     0x7d2e616b4aac - rustc_query_impl[4316bc259f8ef16e]::query_impl::eval_to_allocation_raw::get_query_non_incr::__rust_end_short_backtrace
  28:     0x7d2e616b460c - rustc_middle[d30f97e255128713]::query::plumbing::query_get_at::<rustc_query_system[8cff448a052401bd]::query::caches::DefaultCache<rustc_middle[d30f97e255128713]::ty::ParamEnvAnd<rustc_middle[d30f97e255128713]::mir::interpret::GlobalId>, rustc_middle[d30f97e255128713]::query::erase::Erased<[u8; 24usize]>>>
  29:     0x7d2e616b2afc - rustc_const_eval[6d96b92d4bade795]::const_eval::eval_queries::eval_to_const_value_raw_provider
  30:     0x7d2e616b2a76 - rustc_query_impl[4316bc259f8ef16e]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[4316bc259f8ef16e]::query_impl::eval_to_const_value_raw::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d30f97e255128713]::query::erase::Erased<[u8; 24usize]>>
  31:     0x7d2e616b4e99 - rustc_query_system[8cff448a052401bd]::query::plumbing::try_execute_query::<rustc_query_impl[4316bc259f8ef16e]::DynamicConfig<rustc_query_system[8cff448a052401bd]::query::caches::DefaultCache<rustc_middle[d30f97e255128713]::ty::ParamEnvAnd<rustc_middle[d30f97e255128713]::mir::interpret::GlobalId>, rustc_middle[d30f97e255128713]::query::erase::Erased<[u8; 24usize]>>, false, false, false>, rustc_query_impl[4316bc259f8ef16e]::plumbing::QueryCtxt, false>
  32:     0x7d2e616b49ac - rustc_query_impl[4316bc259f8ef16e]::query_impl::eval_to_const_value_raw::get_query_non_incr::__rust_end_short_backtrace
  33:     0x7d2e61043e10 - <rustc_middle[d30f97e255128713]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[6f20a5ebf44cea1c]::check_crate::{closure#3}>::{closure#0}
  34:     0x7d2e6104243c - rustc_hir_analysis[6f20a5ebf44cea1c]::check_crate
  35:     0x7d2e613163ba - rustc_interface[ffee9ea60ef965c3]::passes::analysis
  36:     0x7d2e61315f15 - rustc_query_impl[4316bc259f8ef16e]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[4316bc259f8ef16e]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[d30f97e255128713]::query::erase::Erased<[u8; 1usize]>>
  37:     0x7d2e61b8dca5 - rustc_query_system[8cff448a052401bd]::query::plumbing::try_execute_query::<rustc_query_impl[4316bc259f8ef16e]::DynamicConfig<rustc_query_system[8cff448a052401bd]::query::caches::SingleCache<rustc_middle[d30f97e255128713]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[4316bc259f8ef16e]::plumbing::QueryCtxt, false>
  38:     0x7d2e61b8da09 - rustc_query_impl[4316bc259f8ef16e]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  39:     0x7d2e619ea753 - rustc_interface[ffee9ea60ef965c3]::interface::run_compiler::<core[d851a872a27282f9]::result::Result<(), rustc_span[128fa906eb8a1c67]::ErrorGuaranteed>, rustc_driver_impl[480b09937bfb0708]::run_compiler::{closure#0}>::{closure#1}
  40:     0x7d2e619d8627 - std[37c8ccdab8a3c0d8]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[ffee9ea60ef965c3]::util::run_in_thread_with_globals<rustc_interface[ffee9ea60ef965c3]::util::run_in_thread_pool_with_globals<rustc_interface[ffee9ea60ef965c3]::interface::run_compiler<core[d851a872a27282f9]::result::Result<(), rustc_span[128fa906eb8a1c67]::ErrorGuaranteed>, rustc_driver_impl[480b09937bfb0708]::run_compiler::{closure#0}>::{closure#1}, core[d851a872a27282f9]::result::Result<(), rustc_span[128fa906eb8a1c67]::ErrorGuaranteed>>::{closure#0}, core[d851a872a27282f9]::result::Result<(), rustc_span[128fa906eb8a1c67]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d851a872a27282f9]::result::Result<(), rustc_span[128fa906eb8a1c67]::ErrorGuaranteed>>
  41:     0x7d2e619d83ea - <<std[37c8ccdab8a3c0d8]::thread::Builder>::spawn_unchecked_<rustc_interface[ffee9ea60ef965c3]::util::run_in_thread_with_globals<rustc_interface[ffee9ea60ef965c3]::util::run_in_thread_pool_with_globals<rustc_interface[ffee9ea60ef965c3]::interface::run_compiler<core[d851a872a27282f9]::result::Result<(), rustc_span[128fa906eb8a1c67]::ErrorGuaranteed>, rustc_driver_impl[480b09937bfb0708]::run_compiler::{closure#0}>::{closure#1}, core[d851a872a27282f9]::result::Result<(), rustc_span[128fa906eb8a1c67]::ErrorGuaranteed>>::{closure#0}, core[d851a872a27282f9]::result::Result<(), rustc_span[128fa906eb8a1c67]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d851a872a27282f9]::result::Result<(), rustc_span[128fa906eb8a1c67]::ErrorGuaranteed>>::{closure#2} as core[d851a872a27282f9]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  42:     0x7d2e6319e60b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h8fcfbedcc7bc1020
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/alloc/src/boxed.rs:2022:9
  43:     0x7d2e6319e60b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hb725f441e1474916
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/alloc/src/boxed.rs:2022:9
  44:     0x7d2e6319e60b - std::sys::pal::unix::thread::Thread::new::thread_start::h34c8a550ac2bc24c
                               at /rustc/290d792411566c94273e5d1a980a1ab91f1d950b/library/std/src/sys/pal/unix/thread.rs:108:17
  45:     0x7d2e62f3c55a - <unknown>
  46:     0x7d2e62fb9a3c - <unknown>
  47:                0x0 - <unknown>

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 make sure that you have updated to the latest nightly

note: rustc 1.79.0-nightly (290d79241 2024-04-22) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z dump-mir-dir=dir

query stack during panic:
#0 [eval_to_allocation_raw] const-evaluating + checking `_`
#1 [eval_to_const_value_raw] simplifying constant for the type system `_`
#2 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 3 previous errors

Some errors have detailed explanations: E0106, E0601.
For more information about an error, try `rustc --explain E0106`.

[matthiaskrgr]

bisects to #122749