internal compiler error: compiler/rustc_borrowck/src/universal_regions.rs:888:36: cannot convert '{erased} to a region vid

[chorman0773]

Code

https://github.com/LiliumOS/ld-so-impl

I have a hunch about what the cause is but I'm going to post this ahead of that test

Meta

rustc --version --verbose:

rustc 1.87.0-nightly (5bc623145 2025-02-16)
binary: rustc
commit-hash: 5bc62314547c7639484481f62f218156697cfef0
commit-date: 2025-02-16
host: x86_64-unknown-linux-gnu
release: 1.87.0-nightly
LLVM version: 19.1.7

Error output

error: internal compiler error: compiler/rustc_borrowck/src/universal_regions.rs:888:36: cannot convert `'{erased}` to a region vid


thread 'rustc' panicked at compiler/rustc_borrowck/src/universal_regions.rs:888:36:
Box<dyn Any>

Backtrace

   0:     0x7f29147dea00 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::h81a025b838a799af
   1:     0x7f291502e3fc - core::fmt::write::hd3823ab55c7d999c
   2:     0x7f29162c6891 - std::io::Write::write_fmt::h5e6af3943896250f
   3:     0x7f29147de862 - std::sys::backtrace::BacktraceLock::print::hf5bb184f356adeed
   4:     0x7f29147e0ce2 - std::panicking::default_hook::{{closure}}::h2fb43070f4f38070
   5:     0x7f29147e0b6a - std::panicking::default_hook::hc3e68110c7118279
   6:     0x7f291393f5d9 - std[ca4a46111f2ac979]::panicking::update_hook::<alloc[23c9a7aa388813b8]::boxed::Box<rustc_driver_impl[9a3794d01d686e58]::install_ice_hook::{closure#1}>>::{closure#0}
   7:     0x7f29147e1863 - std::panicking::rust_panic_with_hook::ha716adeeb3fcca6d
   8:     0x7f291397a541 - std[ca4a46111f2ac979]::panicking::begin_panic::<rustc_errors[408e59f76d65792a]::ExplicitBug>::{closure#0}
   9:     0x7f291396f4b6 - std[ca4a46111f2ac979]::sys::backtrace::__rust_end_short_backtrace::<std[ca4a46111f2ac979]::panicking::begin_panic<rustc_errors[408e59f76d65792a]::ExplicitBug>::{closure#0}, !>
  10:     0x7f291396f4a3 - std[ca4a46111f2ac979]::panicking::begin_panic::<rustc_errors[408e59f76d65792a]::ExplicitBug>
  11:     0x7f2913984511 - <rustc_errors[408e59f76d65792a]::diagnostic::BugAbort as rustc_errors[408e59f76d65792a]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  12:     0x7f2913f58353 - rustc_middle[ffbde0fb0a97a70]::util::bug::opt_span_bug_fmt::<rustc_span[4ccf6a12323e11a7]::span_encoding::Span>::{closure#0}
  13:     0x7f2913f4118a - rustc_middle[ffbde0fb0a97a70]::ty::context::tls::with_opt::<rustc_middle[ffbde0fb0a97a70]::util::bug::opt_span_bug_fmt<rustc_span[4ccf6a12323e11a7]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  14:     0x7f2913f4101b - rustc_middle[ffbde0fb0a97a70]::ty::context::tls::with_context_opt::<rustc_middle[ffbde0fb0a97a70]::ty::context::tls::with_opt<rustc_middle[ffbde0fb0a97a70]::util::bug::opt_span_bug_fmt<rustc_span[4ccf6a12323e11a7]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  15:     0x7f29126f8f70 - rustc_middle[ffbde0fb0a97a70]::util::bug::bug_fmt
  16:     0x7f29164e7c8f - <rustc_borrowck[bb7cc0771ba28ea2]::universal_regions::UniversalRegionIndices>::to_region_vid.cold
  17:     0x7f291505a381 - <rustc_middle[ffbde0fb0a97a70]::ty::Ty as rustc_type_ir[44a8b8b46de4628a]::fold::TypeSuperFoldable<rustc_middle[ffbde0fb0a97a70]::ty::context::TyCtxt>>::try_super_fold_with::<rustc_type_ir[44a8b8b46de4628a]::fold::RegionFolder<rustc_middle[ffbde0fb0a97a70]::ty::context::TyCtxt>>
  18:     0x7f2916077f09 - rustc_borrowck[bb7cc0771ba28ea2]::do_mir_borrowck
  19:     0x7f29160758ed - rustc_query_impl[1c28f5bf7cdb6e44]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[1c28f5bf7cdb6e44]::query_impl::mir_borrowck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[ffbde0fb0a97a70]::query::erase::Erased<[u8; 8usize]>>
  20:     0x7f29154347c7 - rustc_query_system[adcf6d99c8674cd]::query::plumbing::try_execute_query::<rustc_query_impl[1c28f5bf7cdb6e44]::DynamicConfig<rustc_data_structures[8645f6f92c55d6af]::vec_cache::VecCache<rustc_span[4ccf6a12323e11a7]::def_id::LocalDefId, rustc_middle[ffbde0fb0a97a70]::query::erase::Erased<[u8; 8usize]>, rustc_query_system[adcf6d99c8674cd]::dep_graph::graph::DepNodeIndex>, false, false, false>, rustc_query_impl[1c28f5bf7cdb6e44]::plumbing::QueryCtxt, true>
  21:     0x7f2915451cf5 - rustc_query_impl[1c28f5bf7cdb6e44]::query_impl::mir_borrowck::get_query_incr::__rust_end_short_backtrace
  22:     0x7f291542b0dc - rustc_interface[86fb661cc3809d83]::passes::run_required_analyses
  23:     0x7f2915ab111e - rustc_interface[86fb661cc3809d83]::passes::analysis
  24:     0x7f2915ab10ef - rustc_query_impl[1c28f5bf7cdb6e44]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[1c28f5bf7cdb6e44]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[ffbde0fb0a97a70]::query::erase::Erased<[u8; 0usize]>>
  25:     0x7f29160c6c53 - rustc_query_system[adcf6d99c8674cd]::query::plumbing::try_execute_query::<rustc_query_impl[1c28f5bf7cdb6e44]::DynamicConfig<rustc_query_system[adcf6d99c8674cd]::query::caches::SingleCache<rustc_middle[ffbde0fb0a97a70]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[1c28f5bf7cdb6e44]::plumbing::QueryCtxt, true>
  26:     0x7f29160c65d5 - rustc_query_impl[1c28f5bf7cdb6e44]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
  27:     0x7f2915f57a29 - rustc_interface[86fb661cc3809d83]::passes::create_and_enter_global_ctxt::<core[2bd42581db974919]::option::Option<rustc_interface[86fb661cc3809d83]::queries::Linker>, rustc_driver_impl[9a3794d01d686e58]::run_compiler::{closure#0}::{closure#2}>::{closure#2}::{closure#0}
  28:     0x7f2915f36329 - rustc_interface[86fb661cc3809d83]::interface::run_compiler::<(), rustc_driver_impl[9a3794d01d686e58]::run_compiler::{closure#0}>::{closure#1}
  29:     0x7f2915e8df84 - std[ca4a46111f2ac979]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[86fb661cc3809d83]::util::run_in_thread_with_globals<rustc_interface[86fb661cc3809d83]::util::run_in_thread_pool_with_globals<rustc_interface[86fb661cc3809d83]::interface::run_compiler<(), rustc_driver_impl[9a3794d01d686e58]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>
  30:     0x7f2915e8dc59 - <<std[ca4a46111f2ac979]::thread::Builder>::spawn_unchecked_<rustc_interface[86fb661cc3809d83]::util::run_in_thread_with_globals<rustc_interface[86fb661cc3809d83]::util::run_in_thread_pool_with_globals<rustc_interface[86fb661cc3809d83]::interface::run_compiler<(), rustc_driver_impl[9a3794d01d686e58]::run_compiler::{closure#0}>::{closure#1}, ()>::{closure#0}, ()>::{closure#0}::{closure#0}, ()>::{closure#1} as core[2bd42581db974919]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  31:     0x7f2915e8d3eb - std::sys::pal::unix::thread::Thread::new::thread_start::h305cd0ee63d4587a
  32:     0x7f290fea1e2e - start_thread
                               at ./nptl/pthread_create.c:447:8
  33:     0x7f290ff33a4c - __GI___clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78:0
  34:                0x0 - <unknown>

[chorman0773]

https://play.rust-lang.org/?version=nightly&mode=debug&edition=2021&gist=d8d035ee49cb6a4a902d1222e58379c8

pub unsafe fn foo<'a>() -> &'a (){todo!()}

::core::arch::global_asm!{
    "/*{}*/",
    sym foo
}

Minimized.

Incidentally, making 'a anything other than an unbound lifetime does not cause an ICE.

[compiler-errors]

This is a duplicate of #96304. Making 'a late-bound will "hide" the error bc of differences in how early- and late-bound lifetimes are handled borrowck.