ice: cfi: encode_region: unexpected ReEarlyBound(0, 'a)

[matthiaskrgr]

Code

rustc -Clto -Zsanitizer=cfi

pub trait MyTrait<'a> {
    type Output: 'a;
    fn gimme_value(&self) -> Self::Output;
}

pub struct MyStruct;

impl<'a> MyTrait<'a> for MyStruct {
    type Output = &'a usize;
    fn gimme_value(&self) -> Self::Output {
        unimplemented!()
    }
}

fn meow<T, F>(t: T, f: F)
where
    T: for<'any> MyTrait<'any>,
    F: for<'any2> Fn(<T as MyTrait<'any2>>::Output),
{
    let v = t.gimme_value();
    f(v);
}

fn main() {
    let struc = MyStruct;
    meow(struc, |foo| {})
}

Meta

rustc --version --verbose:

rustc 1.71.0-nightly (077fc26f0 2023-05-12)
binary: rustc
commit-hash: 077fc26f0acfa54e9c580534616c17ffc279a9d4
commit-date: 2023-05-12
host: x86_64-unknown-linux-gnu
release: 1.71.0-nightly
LLVM version: 16.0.2

Error output

<output>

Backtrace

error: internal compiler error: compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs:285:13: encode_region: unexpected `ReEarlyBound(0, 'a)`

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/compiler/rustc_errors/src/lib.rs:1650:9
stack backtrace:
   0:     0x7f746ff6a051 - std::backtrace_rs::backtrace::libunwind::trace::h3078c38bcf244cb0
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f746ff6a051 - std::backtrace_rs::backtrace::trace_unsynchronized::hae8fc14cdc8e4133
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f746ff6a051 - std::sys_common::backtrace::_print_fmt::hd18feb1e248cc700
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f746ff6a051 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h0778d4788d776d0c
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f746ffca4af - core::fmt::rt::Argument::fmt::hfc4761188bd54631
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/core/src/fmt/rt.rs:138:9
   5:     0x7f746ffca4af - core::fmt::write::h79a7fdd9d194cc0d
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/core/src/fmt/mod.rs:1094:21
   6:     0x7f746ff5d351 - std::io::Write::write_fmt::hf2bf8061d31c573e
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/io/mod.rs:1712:15
   7:     0x7f746ff69e65 - std::sys_common::backtrace::_print::hc8cc601132b2e52e
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f746ff69e65 - std::sys_common::backtrace::print::hd81a33670e423952
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f746ff6cae7 - std::panicking::default_hook::{{closure}}::h87364cf24ac04124
  10:     0x7f746ff6c8d4 - std::panicking::default_hook::h5b78b38c2a54b17a
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/panicking.rs:288:9
  11:     0x7f74731e8d1b - <rustc_driver_impl[13bf0d04f0b67ce9]::install_ice_hook::{closure#0} as core[9035cf7f5955cd74]::ops::function::FnOnce<(&core[9035cf7f5955cd74]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  12:     0x7f746ff6d207 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hdc5f2153a7f41863
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/alloc/src/boxed.rs:1999:9
  13:     0x7f746ff6d207 - std::panicking::rust_panic_with_hook::h045d197919c3e8ba
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/panicking.rs:695:13
  14:     0x7f74736d8181 - std[b0554e33ca57edeb]::panicking::begin_panic::<rustc_errors[26f4fb3d98328957]::ExplicitBug>::{closure#0}
  15:     0x7f74736d5d06 - std[b0554e33ca57edeb]::sys_common::backtrace::__rust_end_short_backtrace::<std[b0554e33ca57edeb]::panicking::begin_panic<rustc_errors[26f4fb3d98328957]::ExplicitBug>::{closure#0}, !>
  16:     0x7f74736d59a6 - std[b0554e33ca57edeb]::panicking::begin_panic::<rustc_errors[26f4fb3d98328957]::ExplicitBug>
  17:     0x7f74736d0954 - <rustc_errors[26f4fb3d98328957]::HandlerInner>::bug::<alloc[b30310a06b34fd3]::string::String>
  18:     0x7f74736d0686 - <rustc_errors[26f4fb3d98328957]::Handler>::bug::<alloc[b30310a06b34fd3]::string::String>
  19:     0x7f747375a48c - rustc_middle[c66c2d2ac5a96442]::util::bug::opt_span_bug_fmt::<rustc_span[8db14cdbe7f466b8]::span_encoding::Span>::{closure#0}
  20:     0x7f747375a2ca - rustc_middle[c66c2d2ac5a96442]::ty::context::tls::with_opt::<rustc_middle[c66c2d2ac5a96442]::util::bug::opt_span_bug_fmt<rustc_span[8db14cdbe7f466b8]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  21:     0x7f747375a29a - rustc_middle[c66c2d2ac5a96442]::ty::context::tls::with_context_opt::<rustc_middle[c66c2d2ac5a96442]::ty::context::tls::with_opt<rustc_middle[c66c2d2ac5a96442]::util::bug::opt_span_bug_fmt<rustc_span[8db14cdbe7f466b8]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  22:     0x7f747142973d - rustc_middle[c66c2d2ac5a96442]::util::bug::bug_fmt
  23:     0x7f7473c519d9 - rustc_symbol_mangling[f4730ed954a99ba6]::typeid::typeid_itanium_cxx_abi::encode_region
  24:     0x7f7473c51ad8 - rustc_symbol_mangling[f4730ed954a99ba6]::typeid::typeid_itanium_cxx_abi::encode_substs
  25:     0x7f7473c51543 - rustc_symbol_mangling[f4730ed954a99ba6]::typeid::typeid_itanium_cxx_abi::encode_predicates
  26:     0x7f7473c52bfb - rustc_symbol_mangling[f4730ed954a99ba6]::typeid::typeid_itanium_cxx_abi::encode_ty
  27:     0x7f7473c52f8e - rustc_symbol_mangling[f4730ed954a99ba6]::typeid::typeid_itanium_cxx_abi::encode_ty
  28:     0x7f7473c556c4 - rustc_symbol_mangling[f4730ed954a99ba6]::typeid::typeid_itanium_cxx_abi::typeid_for_fnabi
  29:     0x7f7473c54f8a - rustc_symbol_mangling[f4730ed954a99ba6]::typeid::typeid_itanium_cxx_abi::typeid_for_instance
  30:     0x7f74715a733a - <rustc_codegen_llvm[c5a88784cad09a28]::context::CodegenCx as rustc_codegen_ssa[1d9595b98f3b7f2]::traits::declare::PreDefineMethods>::predefine_fn
  31:     0x7f7472656d91 - rustc_codegen_llvm[c5a88784cad09a28]::base::compile_codegen_unit::module_codegen
  32:     0x7f7472655d28 - rustc_codegen_llvm[c5a88784cad09a28]::base::compile_codegen_unit
  33:     0x7f74728adf3f - rustc_codegen_ssa[1d9595b98f3b7f2]::base::codegen_crate::<rustc_codegen_llvm[c5a88784cad09a28]::LlvmCodegenBackend>
  34:     0x7f74728ad7d0 - <rustc_codegen_llvm[c5a88784cad09a28]::LlvmCodegenBackend as rustc_codegen_ssa[1d9595b98f3b7f2]::traits::backend::CodegenBackend>::codegen_crate
  35:     0x7f74723ea750 - rustc_interface[813041c30d6fe35a]::passes::start_codegen
  36:     0x7f74723e6297 - <rustc_middle[c66c2d2ac5a96442]::ty::context::GlobalCtxt>::enter::<<rustc_interface[813041c30d6fe35a]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[9035cf7f5955cd74]::result::Result<alloc[b30310a06b34fd3]::boxed::Box<dyn core[9035cf7f5955cd74]::any::Any>, rustc_span[8db14cdbe7f466b8]::ErrorGuaranteed>>
  37:     0x7f74723e5a0d - <rustc_interface[813041c30d6fe35a]::queries::Queries>::ongoing_codegen
  38:     0x7f74723e4ea3 - <rustc_interface[813041c30d6fe35a]::interface::Compiler>::enter::<rustc_driver_impl[13bf0d04f0b67ce9]::run_compiler::{closure#1}::{closure#2}, core[9035cf7f5955cd74]::result::Result<core[9035cf7f5955cd74]::option::Option<rustc_interface[813041c30d6fe35a]::queries::Linker>, rustc_span[8db14cdbe7f466b8]::ErrorGuaranteed>>
  39:     0x7f74723e250b - std[b0554e33ca57edeb]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[813041c30d6fe35a]::util::run_in_thread_pool_with_globals<rustc_interface[813041c30d6fe35a]::interface::run_compiler<core[9035cf7f5955cd74]::result::Result<(), rustc_span[8db14cdbe7f466b8]::ErrorGuaranteed>, rustc_driver_impl[13bf0d04f0b67ce9]::run_compiler::{closure#1}>::{closure#0}, core[9035cf7f5955cd74]::result::Result<(), rustc_span[8db14cdbe7f466b8]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[9035cf7f5955cd74]::result::Result<(), rustc_span[8db14cdbe7f466b8]::ErrorGuaranteed>>
  40:     0x7f74723e1c75 - <<std[b0554e33ca57edeb]::thread::Builder>::spawn_unchecked_<rustc_interface[813041c30d6fe35a]::util::run_in_thread_pool_with_globals<rustc_interface[813041c30d6fe35a]::interface::run_compiler<core[9035cf7f5955cd74]::result::Result<(), rustc_span[8db14cdbe7f466b8]::ErrorGuaranteed>, rustc_driver_impl[13bf0d04f0b67ce9]::run_compiler::{closure#1}>::{closure#0}, core[9035cf7f5955cd74]::result::Result<(), rustc_span[8db14cdbe7f466b8]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[9035cf7f5955cd74]::result::Result<(), rustc_span[8db14cdbe7f466b8]::ErrorGuaranteed>>::{closure#1} as core[9035cf7f5955cd74]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  41:     0x7f746ff776b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h45f6a2020dca9236
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/alloc/src/boxed.rs:1985:9
  42:     0x7f746ff776b5 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha8428b00e1b18042
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/alloc/src/boxed.rs:1985:9
  43:     0x7f746ff776b5 - std::sys::unix::thread::Thread::new::thread_start::h99203a4e418970a3
                               at /rustc/077fc26f0acfa54e9c580534616c17ffc279a9d4/library/std/src/sys/unix/thread.rs:108:17
  44:     0x7f746fd15bb5 - <unknown>
  45:     0x7f746fd97d90 - <unknown>
  46:                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 1.71.0-nightly (077fc26f0 2023-05-12) running on x86_64-unknown-linux-gnu

note: compiler flags: -C lto -Z sanitizer=cfi

query stack during panic:
end of query stack
error: aborting due to previous error; 1 warning emitted

[rcvalle]

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