ICE: assertion failed: bpos.to_u32() >= mbc.pos.to_u32() + mbc.bytes as u32

[matthiaskrgr]

snippet:

use std::cell::Cell;

fn main() {
    let _: Cell<&str, "a"> = Cell::new('β);
}

Version information

rustc 1.80.0-nightly (ba956ef4b 2024-05-13)
binary: rustc
commit-hash: ba956ef4b00c91579cff9b2220358ee3a46d982f
commit-date: 2024-05-13
host: x86_64-unknown-linux-gnu
release: 1.80.0-nightly
LLVM version: 18.1.4

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

error: expected `while`, `for`, `loop` or `{` after a label
 --> /tmp/icemaker_global_tempdir.RJ1zlv472JZ2/rustc_testrunner_tmpdir_reporting.T7pYNoW6wTVw/mvce.rs:4:42
  |
4 |     let _: Cell<&str, "a"> = Cell::new('β);
  |                                          ^ expected `while`, `for`, `loop` or `{` after a label
  |
help: add `'` to close the char literal
  |
4 |     let _: Cell<&str, "a"> = Cell::new('β');
  |                                          +

error[E0107]: struct takes 1 generic argument but 2 generic arguments were supplied
   --> /tmp/icemaker_global_tempdir.RJ1zlv472JZ2/rustc_testrunner_tmpdir_reporting.T7pYNoW6wTVw/mvce.rs:4:12
    |
4   |     let _: Cell<&str, "a"> = Cell::new('β);
    |            ^^^^       --- help: remove this generic argument
    |            |
    |            expected 1 generic argument
    |
note: struct defined here, with 1 generic parameter: `T`
   --> /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/core/src/cell.rs:293:12
    |
293 | pub struct Cell<T: ?Sized> {
    |            ^^^^ -

error[E0308]: mismatched types
   --> /tmp/icemaker_global_tempdir.RJ1zlv472JZ2/rustc_testrunner_tmpdir_reporting.T7pYNoW6wTVw/mvce.rs:4:40
    |
4   |     let _: Cell<&str, "a"> = Cell::new('β);
    |                              --------- ^^ expected `&str`, found `char`
    |                              |
    |                              arguments to this function are incorrect
    |
note: associated function defined here
   --> /home/matthias/.rustup/toolchains/master/lib/rustlib/src/rust/library/core/src/cell.rs:393:18
    |
393 |     pub const fn new(value: T) -> Cell<T> {
    |                  ^^^
thread 'rustc' panicked at compiler/rustc_span/src/lib.rs:2111:17:
assertion failed: bpos.to_u32() >= mbc.pos.to_u32() + mbc.bytes as u32
stack backtrace:
   0:     0x7c42f598ce55 - std::backtrace_rs::backtrace::libunwind::trace::he1c8af16e60d8ac3
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x7c42f598ce55 - std::backtrace_rs::backtrace::trace_unsynchronized::h0ff4fb4d1fb1eafe
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7c42f598ce55 - std::sys_common::backtrace::_print_fmt::hda02bf9854ed434b
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7c42f598ce55 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h2f1348356d4dd5a6
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7c42f59dc16b - core::fmt::rt::Argument::fmt::hdfc187d135a92cff
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/core/src/fmt/rt.rs:165:63
   5:     0x7c42f59dc16b - core::fmt::write::h2e66cd8a0d755998
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/core/src/fmt/mod.rs:1169:21
   6:     0x7c42f5981bef - std::io::Write::write_fmt::ha6594d6d0318bd63
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/io/mod.rs:1835:15
   7:     0x7c42f598cc2e - std::sys_common::backtrace::_print::h7b339c0ab962de77
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7c42f598cc2e - std::sys_common::backtrace::print::hde9837078a8d5e94
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7c42f598f649 - std::panicking::default_hook::{{closure}}::h0f2e3d59d4fc9781
  10:     0x7c42f598f38d - std::panicking::default_hook::h9944960cd621bbba
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/panicking.rs:298:9
  11:     0x7c42f22eb64f - std[2aee1e20eb236dda]::panicking::update_hook::<alloc[322764ce6b1abc47]::boxed::Box<rustc_driver_impl[b3f759d8272e082a]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7c42f598fd7b - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h63db09f1011a40db
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/alloc/src/boxed.rs:2036:9
  13:     0x7c42f598fd7b - std::panicking::rust_panic_with_hook::hd5c6a18d84f2558b
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/panicking.rs:799:13
  14:     0x7c42f598fabb - std::panicking::begin_panic_handler::{{closure}}::hd605c4780fe5a47c
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/panicking.rs:656:13
  15:     0x7c42f598d319 - std::sys_common::backtrace::__rust_end_short_backtrace::ha2a0c331192f969c
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x7c42f598f827 - rust_begin_unwind
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/panicking.rs:652:5
  17:     0x7c42f59d8733 - core::panicking::panic_fmt::hbb9fab08df76f63b
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/core/src/panicking.rs:72:14
  18:     0x7c42f59d87dc - core::panicking::panic::hc81b94fba70b30ca
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/core/src/panicking.rs:146:5
  19:     0x7c42f404269c - <rustc_span[18b9f7b309fe5dcc]::source_map::SourceMap>::lookup_char_pos
  20:     0x7c42f40420db - <rustc_span[18b9f7b309fe5dcc]::source_map::SourceMap>::is_valid_span
  21:     0x7c42f4648147 - <core[5a1853d728d4f28b]::iter::adapters::filter_map::FilterMap<core[5a1853d728d4f28b]::iter::adapters::cloned::Cloned<core[5a1853d728d4f28b]::iter::adapters::filter::Filter<core[5a1853d728d4f28b]::slice::iter::Iter<rustc_errors[1fa39940d3d52013]::Substitution>, <rustc_errors[1fa39940d3d52013]::CodeSuggestion>::splice_lines::{closure#0}>>, <rustc_errors[1fa39940d3d52013]::CodeSuggestion>::splice_lines::{closure#1}> as core[5a1853d728d4f28b]::iter::traits::iterator::Iterator>::next
  22:     0x7c42f41cd244 - <rustc_errors[1fa39940d3d52013]::emitter::HumanEmitter>::emit_messages_default
  23:     0x7c42f41caddc - <rustc_errors[1fa39940d3d52013]::emitter::HumanEmitter as rustc_errors[1fa39940d3d52013]::emitter::Emitter>::emit_diagnostic
  24:     0x7c42f41d12ba - <rustc_errors[1fa39940d3d52013]::DiagCtxtInner>::emit_diagnostic::{closure#3}
  25:     0x7c42f42e571f - rustc_interface[378bc30a20028389]::callbacks::track_diagnostic::<core[5a1853d728d4f28b]::option::Option<rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>>
  26:     0x7c42f42e38aa - <rustc_errors[1fa39940d3d52013]::DiagCtxtInner>::emit_diagnostic
  27:     0x7c42f42e3799 - <rustc_errors[1fa39940d3d52013]::DiagCtxt>::emit_diagnostic
  28:     0x7c42f46717c0 - <rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed as rustc_errors[1fa39940d3d52013]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  29:     0x7c42f250068c - <rustc_hir_typeck[9965755b35d13bf6]::fn_ctxt::FnCtxt>::report_arg_errors
  30:     0x7c42f0fdd69d - <rustc_hir_typeck[9965755b35d13bf6]::fn_ctxt::FnCtxt>::confirm_builtin_call
  31:     0x7c42f3dff761 - <rustc_hir_typeck[9965755b35d13bf6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  32:     0x7c42f3dead66 - <rustc_hir_typeck[9965755b35d13bf6]::fn_ctxt::FnCtxt>::check_decl
  33:     0x7c42f3df51bc - <rustc_hir_typeck[9965755b35d13bf6]::fn_ctxt::FnCtxt>::check_block_with_expected
  34:     0x7c42f3e00053 - <rustc_hir_typeck[9965755b35d13bf6]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  35:     0x7c42f3dc4d92 - rustc_hir_typeck[9965755b35d13bf6]::check::check_fn
  36:     0x7c42f3dba858 - rustc_hir_typeck[9965755b35d13bf6]::typeck
  37:     0x7c42f3dba2d1 - rustc_query_impl[829470001f3ffad1]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[829470001f3ffad1]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6763d32431b5f193]::query::erase::Erased<[u8; 8usize]>>
  38:     0x7c42f3be44b1 - rustc_query_system[f6e0b1d5265b4ecc]::query::plumbing::try_execute_query::<rustc_query_impl[829470001f3ffad1]::DynamicConfig<rustc_query_system[f6e0b1d5265b4ecc]::query::caches::VecCache<rustc_span[18b9f7b309fe5dcc]::def_id::LocalDefId, rustc_middle[6763d32431b5f193]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[829470001f3ffad1]::plumbing::QueryCtxt, false>
  39:     0x7c42f3be31e0 - rustc_query_impl[829470001f3ffad1]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
  40:     0x7c42f3be2e17 - <rustc_middle[6763d32431b5f193]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[e435ea80bf40f43f]::check_crate::{closure#4}>::{closure#0}
  41:     0x7c42f3be1b08 - rustc_hir_analysis[e435ea80bf40f43f]::check_crate
  42:     0x7c42f418253e - rustc_interface[378bc30a20028389]::passes::analysis
  43:     0x7c42f418209b - rustc_query_impl[829470001f3ffad1]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[829470001f3ffad1]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[6763d32431b5f193]::query::erase::Erased<[u8; 1usize]>>
  44:     0x7c42f4402ca5 - rustc_query_system[f6e0b1d5265b4ecc]::query::plumbing::try_execute_query::<rustc_query_impl[829470001f3ffad1]::DynamicConfig<rustc_query_system[f6e0b1d5265b4ecc]::query::caches::SingleCache<rustc_middle[6763d32431b5f193]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[829470001f3ffad1]::plumbing::QueryCtxt, false>
  45:     0x7c42f4402a09 - rustc_query_impl[829470001f3ffad1]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  46:     0x7c42f423ee0e - rustc_interface[378bc30a20028389]::interface::run_compiler::<core[5a1853d728d4f28b]::result::Result<(), rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>, rustc_driver_impl[b3f759d8272e082a]::run_compiler::{closure#0}>::{closure#1}
  47:     0x7c42f4204a89 - std[2aee1e20eb236dda]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[378bc30a20028389]::util::run_in_thread_with_globals<rustc_interface[378bc30a20028389]::util::run_in_thread_pool_with_globals<rustc_interface[378bc30a20028389]::interface::run_compiler<core[5a1853d728d4f28b]::result::Result<(), rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>, rustc_driver_impl[b3f759d8272e082a]::run_compiler::{closure#0}>::{closure#1}, core[5a1853d728d4f28b]::result::Result<(), rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>>::{closure#0}, core[5a1853d728d4f28b]::result::Result<(), rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[5a1853d728d4f28b]::result::Result<(), rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>>
  48:     0x7c42f4204836 - <<std[2aee1e20eb236dda]::thread::Builder>::spawn_unchecked_<rustc_interface[378bc30a20028389]::util::run_in_thread_with_globals<rustc_interface[378bc30a20028389]::util::run_in_thread_pool_with_globals<rustc_interface[378bc30a20028389]::interface::run_compiler<core[5a1853d728d4f28b]::result::Result<(), rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>, rustc_driver_impl[b3f759d8272e082a]::run_compiler::{closure#0}>::{closure#1}, core[5a1853d728d4f28b]::result::Result<(), rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>>::{closure#0}, core[5a1853d728d4f28b]::result::Result<(), rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[5a1853d728d4f28b]::result::Result<(), rustc_span[18b9f7b309fe5dcc]::ErrorGuaranteed>>::{closure#2} as core[5a1853d728d4f28b]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  49:     0x7c42f5999c1b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1118031ec204f534
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/alloc/src/boxed.rs:2022:9
  50:     0x7c42f5999c1b - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h46a265d132dda3f6
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/alloc/src/boxed.rs:2022:9
  51:     0x7c42f5999c1b - std::sys::pal::unix::thread::Thread::new::thread_start::hfd925ddaab3cb24c
                               at /rustc/ba956ef4b00c91579cff9b2220358ee3a46d982f/library/std/src/sys/pal/unix/thread.rs:108:17
  52:     0x7c42ef0a955a - <unknown>
  53:     0x7c42ef126a3c - <unknown>
  54:                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: please make sure that you have updated to the latest nightly

note: rustc 1.80.0-nightly (ba956ef4b 2024-05-13) running on x86_64-unknown-linux-gnu

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 3 previous errors

Some errors have detailed explanations: E0107, E0308.
For more information about an error, try `rustc --explain E0107`.

[matthiaskrgr]

#122217 cc @estebank