ICE 'try_get_slice_bytes' on non-slice constant

[matthiaskrgr]

auto-reduced (treereduce-rust):

use std::fmt::Debug;

const CONST_0: dyn Debug + Sync = *();

const CONST_FOO: str = *"foo";

static STATIC_1: dyn Debug + Sync = *();

static STATIC_BAR: str = *"bar";

fn main() {
    println!(
        "{:?} {:?} {:?} {:?}",
        &CONST_0, &CONST_FOO, &STATIC_1, &STATIC_BAR
    );
}

original:

use std::fmt::Debug;

const CONST_0: dyn Debug + Sync = *(&0 as &(dyn Debug + Sync));
//~ ERROR evaluation of `<std::string::String as Bar<std::string::String>>::F` failed
//~| ERROR the size for values of type

const CONST_FOO: str = *"foo";
//~^ ERROR the size for values of type
//~| ERROR the size for values of type

static STATIC_1: dyn Debug + Sync = *(&1 as &(dyn Debug + Sync));
//~^ ERROR the size for values of type
//~| ERROR the size for values of type

static STATIC_BAR: str = *"bar";
//~^ ERROR the size for values of type
//~| ERROR the size for values of type

fn main() {
    println!("{:?} {:?} {:?} {:?}", &CONST_0, &CONST_FOO, &STATIC_1, &STATIC_BAR);
}

Version information

rustc 1.78.0-nightly (ee9c7c940 2024-02-14)
binary: rustc
commit-hash: ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46
commit-date: 2024-02-14
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 18.1.0

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zdump-mir=all

Program output

error[E0277]: the size for values of type `(dyn Debug + Sync + 'static)` cannot be known at compilation time
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:3:16
  |
3 | const CONST_0: dyn Debug + Sync = *();
  |                ^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
  |
  = help: the trait `Sized` is not implemented for `(dyn Debug + Sync + 'static)`

error[E0614]: type `()` cannot be dereferenced
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:3:35
  |
3 | const CONST_0: dyn Debug + Sync = *();
  |                                   ^^^

error[E0277]: the size for values of type `(dyn Debug + Sync + 'static)` cannot be known at compilation time
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:3:35
  |
3 | const CONST_0: dyn Debug + Sync = *();
  |                                   ^^^ doesn't have a size known at compile-time
  |
  = help: the trait `Sized` is not implemented for `(dyn Debug + Sync + 'static)`
  = note: constant expressions must have a statically known size

error[E0277]: the size for values of type `str` cannot be known at compilation time
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:5:18
  |
5 | const CONST_FOO: str = *"foo";
  |                  ^^^ doesn't have a size known at compile-time
  |
  = help: the trait `Sized` is not implemented for `str`

error[E0277]: the size for values of type `str` cannot be known at compilation time
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:5:24
  |
5 | const CONST_FOO: str = *"foo";
  |                        ^^^^^^ doesn't have a size known at compile-time
  |
  = help: the trait `Sized` is not implemented for `str`
  = note: constant expressions must have a statically known size

error[E0277]: the size for values of type `(dyn Debug + Sync + 'static)` cannot be known at compilation time
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:7:18
  |
7 | static STATIC_1: dyn Debug + Sync = *();
  |                  ^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
  |
  = help: the trait `Sized` is not implemented for `(dyn Debug + Sync + 'static)`

error[E0614]: type `()` cannot be dereferenced
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:7:37
  |
7 | static STATIC_1: dyn Debug + Sync = *();
  |                                     ^^^

error[E0277]: the size for values of type `(dyn Debug + Sync + 'static)` cannot be known at compilation time
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:7:37
  |
7 | static STATIC_1: dyn Debug + Sync = *();
  |                                     ^^^ doesn't have a size known at compile-time
  |
  = help: the trait `Sized` is not implemented for `(dyn Debug + Sync + 'static)`
  = note: constant expressions must have a statically known size

error[E0277]: the size for values of type `str` cannot be known at compilation time
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:9:20
  |
9 | static STATIC_BAR: str = *"bar";
  |                    ^^^ doesn't have a size known at compile-time
  |
  = help: the trait `Sized` is not implemented for `str`

error[E0277]: the size for values of type `str` cannot be known at compilation time
 --> /tmp/icemaker_global_tempdir.oo4WJqbhBMd4/rustc_testrunner_tmpdir_reporting.ijAv6nUShzKD/mvce.rs:9:26
  |
9 | static STATIC_BAR: str = *"bar";
  |                          ^^^^^^ doesn't have a size known at compile-time
  |
  = help: the trait `Sized` is not implemented for `str`
  = note: constant expressions must have a statically known size

error: internal compiler error: compiler/rustc_middle/src/mir/consts.rs:130:17: `try_get_slice_bytes` on non-slice constant

thread 'rustc' panicked at compiler/rustc_middle/src/util/bug.rs:35:44:
Box<dyn Any>
stack backtrace:
   0:     0x7f8068598e46 - std::backtrace_rs::backtrace::libunwind::trace::h5168cb64cb843b87
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7f8068598e46 - std::backtrace_rs::backtrace::trace_unsynchronized::hbbff473666b784c6
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f8068598e46 - std::sys_common::backtrace::_print_fmt::h6c61b632e6cc7949
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7f8068598e46 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h974a6b559c2b8d41
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f80685e946c - core::fmt::rt::Argument::fmt::hf6a5273aff56768c
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/rt.rs:142:9
   5:     0x7f80685e946c - core::fmt::write::h1caffe3a78971207
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/mod.rs:1120:17
   6:     0x7f806858c7ef - std::io::Write::write_fmt::h2caf2bb3485e27a5
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/io/mod.rs:1854:15
   7:     0x7f8068598bf4 - std::sys_common::backtrace::_print::h0414d95b24b9ea44
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f8068598bf4 - std::sys_common::backtrace::print::hfdf60e3b3d06625d
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f806859b93b - std::panicking::default_hook::{{closure}}::h3c1109072cde0ade
  10:     0x7f806859b689 - std::panicking::default_hook::hfe3c076d4f24ecbe
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/panicking.rs:292:9
  11:     0x7f80653f563c - std[2308076c1424b998]::panicking::update_hook::<alloc[33ce0ef41c101337]::boxed::Box<rustc_driver_impl[d317596fd5f90102]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7f806859c0a0 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h8a55f98e23703736
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/alloc/src/boxed.rs:2030:9
  13:     0x7f806859c0a0 - std::panicking::rust_panic_with_hook::hc147efcd5d482f2c
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/panicking.rs:785:13
  14:     0x7f8065422cf4 - std[2308076c1424b998]::panicking::begin_panic::<rustc_errors[5b15740bab0110e6]::ExplicitBug>::{closure#0}
  15:     0x7f806541f656 - std[2308076c1424b998]::sys_common::backtrace::__rust_end_short_backtrace::<std[2308076c1424b998]::panicking::begin_panic<rustc_errors[5b15740bab0110e6]::ExplicitBug>::{closure#0}, !>
  16:     0x7f806541abd6 - std[2308076c1424b998]::panicking::begin_panic::<rustc_errors[5b15740bab0110e6]::ExplicitBug>
  17:     0x7f806542e841 - <rustc_errors[5b15740bab0110e6]::diagnostic_builder::BugAbort as rustc_errors[5b15740bab0110e6]::diagnostic_builder::EmissionGuarantee>::emit_producing_guarantee
  18:     0x7f80657eed3e - <rustc_errors[5b15740bab0110e6]::DiagCtxt>::bug::<alloc[33ce0ef41c101337]::string::String>
  19:     0x7f806588b47b - rustc_middle[efc8e2d5742a68dd]::util::bug::opt_span_bug_fmt::<rustc_span[e043cedf16fd8748]::span_encoding::Span>::{closure#0}
  20:     0x7f8065870f9a - rustc_middle[efc8e2d5742a68dd]::ty::context::tls::with_opt::<rustc_middle[efc8e2d5742a68dd]::util::bug::opt_span_bug_fmt<rustc_span[e043cedf16fd8748]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f8065870e18 - rustc_middle[efc8e2d5742a68dd]::ty::context::tls::with_context_opt::<rustc_middle[efc8e2d5742a68dd]::ty::context::tls::with_opt<rustc_middle[efc8e2d5742a68dd]::util::bug::opt_span_bug_fmt<rustc_span[e043cedf16fd8748]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f8063ca02d0 - rustc_middle[efc8e2d5742a68dd]::util::bug::bug_fmt
  23:     0x7f8065838f1c - <rustc_middle[efc8e2d5742a68dd]::mir::consts::ConstValue>::try_get_slice_bytes_for_diagnostics
  24:     0x7f806584d756 - rustc_middle[efc8e2d5742a68dd]::mir::pretty::pretty_print_const_value_tcx
  25:     0x7f80658392f4 - <rustc_middle[efc8e2d5742a68dd]::mir::consts::Const as core[db7e23408f407db6]::fmt::Display>::fmt
  26:     0x7f80685e946c - core::fmt::rt::Argument::fmt::hf6a5273aff56768c
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/rt.rs:142:9
  27:     0x7f80685e946c - core::fmt::write::h1caffe3a78971207
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/mod.rs:1120:17
  28:     0x7f8065822aa7 - <&alloc[33ce0ef41c101337]::boxed::Box<rustc_middle[efc8e2d5742a68dd]::mir::syntax::ConstOperand> as core[db7e23408f407db6]::fmt::Debug>::fmt
  29:     0x7f80685e946c - core::fmt::rt::Argument::fmt::hf6a5273aff56768c
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/rt.rs:142:9
  30:     0x7f80685e946c - core::fmt::write::h1caffe3a78971207
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/mod.rs:1120:17
  31:     0x7f80658485eb - <rustc_middle[efc8e2d5742a68dd]::mir::syntax::Operand as core[db7e23408f407db6]::fmt::Debug>::fmt
  32:     0x7f80685e946c - core::fmt::rt::Argument::fmt::hf6a5273aff56768c
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/rt.rs:142:9
  33:     0x7f80685e946c - core::fmt::write::h1caffe3a78971207
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/mod.rs:1120:17
  34:     0x7f80658475d9 - <rustc_middle[efc8e2d5742a68dd]::mir::syntax::Rvalue as core[db7e23408f407db6]::fmt::Debug>::fmt
  35:     0x7f80685e946c - core::fmt::rt::Argument::fmt::hf6a5273aff56768c
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/rt.rs:142:9
  36:     0x7f80685e946c - core::fmt::write::h1caffe3a78971207
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/mod.rs:1120:17
  37:     0x7f8065845839 - <rustc_middle[efc8e2d5742a68dd]::mir::statement::Statement as core[db7e23408f407db6]::fmt::Debug>::fmt
  38:     0x7f80685e93f9 - core::fmt::rt::Argument::fmt::hf6a5273aff56768c
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/rt.rs:142:9
  39:     0x7f80685e93f9 - core::fmt::run::h31482ef44d21693f
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/mod.rs:1168:5
  40:     0x7f80685e93f9 - core::fmt::write::h1caffe3a78971207
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/mod.rs:1136:26
  41:     0x7f80685d7e08 - <&mut W as core::fmt::Write::write_fmt::SpecWriteFmt>::spec_write_fmt::hae1624ac05124504
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/mod.rs:211:17
  42:     0x7f80685d7e08 - core::fmt::Write::write_fmt::h99b6b0a9b31b6842
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/core/src/fmt/mod.rs:215:14
  43:     0x7f80685d7e08 - alloc::fmt::format::format_inner::h1fcd95a6a9bdbf13
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/alloc/src/fmt.rs:633:16
  44:     0x7f806599b7aa - rustc_middle[efc8e2d5742a68dd]::mir::pretty::write_mir_fn::<rustc_mir_transform[c0673d0b3c528a53]::pass_manager::dump_mir_for_phase_change::{closure#0}>
  45:     0x7f8066a2d352 - rustc_mir_transform[c0673d0b3c528a53]::mir_const
  46:     0x7f8066a2ca79 - rustc_query_impl[ecef4a4fa1cc3689]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[ecef4a4fa1cc3689]::query_impl::mir_const::dynamic_query::{closure#2}::{closure#0}, rustc_middle[efc8e2d5742a68dd]::query::erase::Erased<[u8; 8usize]>>
  47:     0x7f806678cdb0 - rustc_query_system[8b26caae5283da17]::query::plumbing::try_execute_query::<rustc_query_impl[ecef4a4fa1cc3689]::DynamicConfig<rustc_query_system[8b26caae5283da17]::query::caches::VecCache<rustc_span[e043cedf16fd8748]::def_id::LocalDefId, rustc_middle[efc8e2d5742a68dd]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[ecef4a4fa1cc3689]::plumbing::QueryCtxt, false>
  48:     0x7f806678c74c - rustc_query_impl[ecef4a4fa1cc3689]::query_impl::mir_const::get_query_non_incr::__rust_end_short_backtrace
  49:     0x7f806499146e - rustc_mir_transform[c0673d0b3c528a53]::mir_promoted
  50:     0x7f8066c04692 - rustc_query_impl[ecef4a4fa1cc3689]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[ecef4a4fa1cc3689]::query_impl::mir_promoted::dynamic_query::{closure#2}::{closure#0}, rustc_middle[efc8e2d5742a68dd]::query::erase::Erased<[u8; 16usize]>>
  51:     0x7f8066c04950 - rustc_query_system[8b26caae5283da17]::query::plumbing::try_execute_query::<rustc_query_impl[ecef4a4fa1cc3689]::DynamicConfig<rustc_query_system[8b26caae5283da17]::query::caches::VecCache<rustc_span[e043cedf16fd8748]::def_id::LocalDefId, rustc_middle[efc8e2d5742a68dd]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[ecef4a4fa1cc3689]::plumbing::QueryCtxt, false>
  52:     0x7f80674bd521 - rustc_query_impl[ecef4a4fa1cc3689]::query_impl::mir_promoted::get_query_non_incr::__rust_end_short_backtrace
  53:     0x7f80674bd62e - rustc_borrowck[6196199a33380a9]::mir_borrowck
  54:     0x7f80674bd565 - rustc_query_impl[ecef4a4fa1cc3689]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[ecef4a4fa1cc3689]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[efc8e2d5742a68dd]::query::erase::Erased<[u8; 8usize]>>
  55:     0x7f806678cdb0 - rustc_query_system[8b26caae5283da17]::query::plumbing::try_execute_query::<rustc_query_impl[ecef4a4fa1cc3689]::DynamicConfig<rustc_query_system[8b26caae5283da17]::query::caches::VecCache<rustc_span[e043cedf16fd8748]::def_id::LocalDefId, rustc_middle[efc8e2d5742a68dd]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[ecef4a4fa1cc3689]::plumbing::QueryCtxt, false>
  56:     0x7f806678c8cc - rustc_query_impl[ecef4a4fa1cc3689]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
  57:     0x7f8066ffb730 - rustc_interface[e88069c12facd435]::passes::analysis
  58:     0x7f8066ffb229 - rustc_query_impl[ecef4a4fa1cc3689]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[ecef4a4fa1cc3689]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[efc8e2d5742a68dd]::query::erase::Erased<[u8; 1usize]>>
  59:     0x7f806743afe5 - rustc_query_system[8b26caae5283da17]::query::plumbing::try_execute_query::<rustc_query_impl[ecef4a4fa1cc3689]::DynamicConfig<rustc_query_system[8b26caae5283da17]::query::caches::SingleCache<rustc_middle[efc8e2d5742a68dd]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[ecef4a4fa1cc3689]::plumbing::QueryCtxt, false>
  60:     0x7f806743ad49 - rustc_query_impl[ecef4a4fa1cc3689]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  61:     0x7f8067444695 - rustc_interface[e88069c12facd435]::interface::run_compiler::<core[db7e23408f407db6]::result::Result<(), rustc_span[e043cedf16fd8748]::ErrorGuaranteed>, rustc_driver_impl[d317596fd5f90102]::run_compiler::{closure#0}>::{closure#0}
  62:     0x7f80675c5ad8 - std[2308076c1424b998]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[e88069c12facd435]::util::run_in_thread_with_globals<rustc_interface[e88069c12facd435]::util::run_in_thread_pool_with_globals<rustc_interface[e88069c12facd435]::interface::run_compiler<core[db7e23408f407db6]::result::Result<(), rustc_span[e043cedf16fd8748]::ErrorGuaranteed>, rustc_driver_impl[d317596fd5f90102]::run_compiler::{closure#0}>::{closure#0}, core[db7e23408f407db6]::result::Result<(), rustc_span[e043cedf16fd8748]::ErrorGuaranteed>>::{closure#0}, core[db7e23408f407db6]::result::Result<(), rustc_span[e043cedf16fd8748]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[db7e23408f407db6]::result::Result<(), rustc_span[e043cedf16fd8748]::ErrorGuaranteed>>
  63:     0x7f80675c5904 - <<std[2308076c1424b998]::thread::Builder>::spawn_unchecked_<rustc_interface[e88069c12facd435]::util::run_in_thread_with_globals<rustc_interface[e88069c12facd435]::util::run_in_thread_pool_with_globals<rustc_interface[e88069c12facd435]::interface::run_compiler<core[db7e23408f407db6]::result::Result<(), rustc_span[e043cedf16fd8748]::ErrorGuaranteed>, rustc_driver_impl[d317596fd5f90102]::run_compiler::{closure#0}>::{closure#0}, core[db7e23408f407db6]::result::Result<(), rustc_span[e043cedf16fd8748]::ErrorGuaranteed>>::{closure#0}, core[db7e23408f407db6]::result::Result<(), rustc_span[e043cedf16fd8748]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[db7e23408f407db6]::result::Result<(), rustc_span[e043cedf16fd8748]::ErrorGuaranteed>>::{closure#1} as core[db7e23408f407db6]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  64:     0x7f80685a51e5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hbe12538a3d7e111d
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/alloc/src/boxed.rs:2016:9
  65:     0x7f80685a51e5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h306728bac30291a0
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/alloc/src/boxed.rs:2016:9
  66:     0x7f80685a51e5 - std::sys::pal::unix::thread::Thread::new::thread_start::hec142a176366d167
                               at /rustc/ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46/library/std/src/sys/pal/unix/thread.rs:108:17
  67:     0x7f806246f9eb - <unknown>
  68:     0x7f80624f37cc - <unknown>
  69:                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: rustc 1.78.0-nightly (ee9c7c940 2024-02-14) running on x86_64-unknown-linux-gnu

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

query stack during panic:
#0 [mir_const] preparing `main` for borrow checking
#1 [mir_promoted] promoting constants in MIR for `main`
#2 [mir_borrowck] borrow-checking `main`
#3 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 11 previous errors

Some errors have detailed explanations: E0277, E0614.
For more information about an error, try `rustc --explain E0277`.

[jieyouxu]

It doesn't crash for me on a slightly older nightly

rustc 1.78.0-nightly (a84bb95a1 2024-02-13)
binary: rustc
commit-hash: a84bb95a1f65bfe25038f188763a18e096a86ab2
commit-date: 2024-02-13
host: x86_64-apple-darwin
release: 1.78.0-nightly
LLVM version: 18.1.0

But it does crash with

rustc 1.78.0-nightly (ee9c7c940 2024-02-14)
binary: rustc
commit-hash: ee9c7c940c07d8b67c9a6b2ec930db70dcd23a46
commit-date: 2024-02-14
host: x86_64-apple-darwin
release: 1.78.0-nightly
LLVM version: 18.1.0

Further reduced:

static STATIC_BAR: str = *"bar";

fn main() {
    STATIC_BAR;
}

[lqd]

@oli-obk I presume the requires-nightly label was because the ICE needs -Zdump-mir=all. It bisects to #120847

[oli-obk]

oh whoops. In that case we can close this issue. The fix is to simply only dump mir of code that compiles 😆

[matthiaskrgr]

But this fix is not implemented yet ..?

[oli-obk]

no... I mean on the user side. Just don't run -Z flags on code that doesn't compile (unless they are for debugging erroneous code)

[matthiaskrgr]

ah, heh