ICE: CFI: typeid_for_instance: couldn't get fn_abi of instance Layout(ReferencesError(ErrorGuaranteed(())))

[matthiaskrgr]

auto-reduced (treereduce-rust):

trait Iterable {
    type Item<'a>
    where
        Self: 'a;
    type Iter<'a>: Iterator<Item = Self::Item<'a>>
    where
        Self: 'a;

    fn iter<'a>(&'a self) -> Self::Iter<'a>;
}

impl<T> Iterable for [T] {
    type Item<'a> = <std::slice::Iter<'a, T> as Iterator>::Item where T: 'a;
    type Iter<'a> = std::slice::Iter<'a, T> where T: 'a;

    fn iter<'a>(&'a self) -> Self::Iter<'a> {
        self.iter()
    }
}

fn get_first<'a, I: Iterable + ?Sized>(it: &'a I) -> Option<I::Item<'a>> {
    it.iter().next()
}

fn main() {
    let v = vec![1, 2, 3];

    assert_eq!(Some(&1), get_first(&*v));
}

original code

original:

//@ run-pass

trait Iterable {
    type Item<'a> where Self: 'a;
    type Iter<'a>: Iterator<Item = Self::Item<'a>> where Self: 'a;

    fn iter<'a>(&'a self) -> Self::Iter<'a>;
}

// Impl for struct type
impl<T> Iterable for Vec<T> {
    type Item<'a> = <std::slice::Iter<'a, T> as Iterator>::Item where T: 'a;
    type Iter<'a> = std::slice::Iter<'a, T> where T: 'a;

    fn iter<'a>(&'a self) -> Self::Iter<'a> {
        self[..].iter()
    }
}

// Impl for a primitive type
impl<T> Iterable for [T] {
    type Item<'a> = <std::slice::Iter<'a, T> as Iterator>::Item where T: 'a;
    type Iter<'a> = std::slice::Iter<'a, T> where T: 'a;

    fn iter<'a>(&'a self) -> Self::Iter<'a> {
        self.iter()
    }
}

fn make_iter<'a, I: Iterable + ?Sized>(it: &'a I) -> I::Iter<'a> {
    it.iter()
}

fn get_first<'a, I: Iterable + ?Sized>(it: &'a I) -> Option<I::Item<'a>> {
    it.iter().next()
}

fn main() {
    let v = vec![1, 2, 3];
    assert_eq!(v, make_iter(&v).copied().collect::<Vec<_>>());
    assert_eq!(v, make_iter(&*v).copied().collect::<Vec<_>>());
    assert_eq!(Some(&1), get_first(&v));
    assert_eq!(Some(&1), get_first(&*v));
}

Version information

rustc 1.79.0-nightly (60b5ca627 2024-03-25)
binary: rustc
commit-hash: 60b5ca62752ecc25d578066c8b82e1a4887267d4
commit-date: 2024-03-25
host: x86_64-unknown-linux-gnu
release: 1.79.0-nightly
LLVM version: 18.1.2

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zsanitizer=cfi -Ccodegen-units=1 -Clto

Program output

error: internal compiler error: compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs:1156:13: typeid_for_instance: couldn't get fn_abi of instance Layout(ReferencesError(ErrorGuaranteed(())))

thread 'rustc' panicked at compiler/rustc_symbol_mangling/src/typeid/typeid_itanium_cxx_abi.rs:1156:13:
Box<dyn Any>
stack backtrace:
   0:     0x7e02d0c78fd5 - std::backtrace_rs::backtrace::libunwind::trace::h3d729e02b7e4f4c0
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5
   1:     0x7e02d0c78fd5 - std::backtrace_rs::backtrace::trace_unsynchronized::hf9eb6a6851ced4d3
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7e02d0c78fd5 - std::sys_common::backtrace::_print_fmt::h5805b0883c8e47eb
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7e02d0c78fd5 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h3942b2eb4c92ae4e
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7e02d0cca13b - core::fmt::rt::Argument::fmt::hd383c8373911ab98
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/core/src/fmt/rt.rs:142:9
   5:     0x7e02d0cca13b - core::fmt::write::h8fb8e625d0cb91a1
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/core/src/fmt/mod.rs:1153:17
   6:     0x7e02d0c6dcef - std::io::Write::write_fmt::h0c3f4e542287e339
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/io/mod.rs:1843:15
   7:     0x7e02d0c78dae - std::sys_common::backtrace::_print::h1a365287e06139f8
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7e02d0c78dae - std::sys_common::backtrace::print::h392e73d3ce4b6fbf
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7e02d0c7ba29 - std::panicking::default_hook::{{closure}}::h86ce919162e2a311
  10:     0x7e02d0c7b793 - std::panicking::default_hook::h621dc5c1001ac910
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/panicking.rs:292:9
  11:     0x7e02cd5c955f - std[1b6e1574881e4af5]::panicking::update_hook::<alloc[bf78e88bc4a89855]::boxed::Box<rustc_driver_impl[7d29d24e5efe687d]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7e02d0c7c12c - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::ha0bc3aa1b224b6ca
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/alloc/src/boxed.rs:2029:9
  13:     0x7e02d0c7c12c - std::panicking::rust_panic_with_hook::ha13a99f805e025ca
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/panicking.rs:793:13
  14:     0x7e02cd5f98f4 - std[1b6e1574881e4af5]::panicking::begin_panic::<rustc_errors[c5cbbdbb9312513c]::ExplicitBug>::{closure#0}
  15:     0x7e02cd5f6546 - std[1b6e1574881e4af5]::sys_common::backtrace::__rust_end_short_backtrace::<std[1b6e1574881e4af5]::panicking::begin_panic<rustc_errors[c5cbbdbb9312513c]::ExplicitBug>::{closure#0}, !>
  16:     0x7e02cd5f1a56 - std[1b6e1574881e4af5]::panicking::begin_panic::<rustc_errors[c5cbbdbb9312513c]::ExplicitBug>
  17:     0x7e02cd602d81 - <rustc_errors[c5cbbdbb9312513c]::diagnostic::BugAbort as rustc_errors[c5cbbdbb9312513c]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  18:     0x7e02cda94d6c - rustc_middle[55fe5918396ccd80]::util::bug::opt_span_bug_fmt::<rustc_span[58a22cdedf80650f]::span_encoding::Span>::{closure#0}
  19:     0x7e02cda783ca - rustc_middle[55fe5918396ccd80]::ty::context::tls::with_opt::<rustc_middle[55fe5918396ccd80]::util::bug::opt_span_bug_fmt<rustc_span[58a22cdedf80650f]::span_encoding::Span>::{closure#0}, !>::{closure#0}
  20:     0x7e02cda7826b - rustc_middle[55fe5918396ccd80]::ty::context::tls::with_context_opt::<rustc_middle[55fe5918396ccd80]::ty::context::tls::with_opt<rustc_middle[55fe5918396ccd80]::util::bug::opt_span_bug_fmt<rustc_span[58a22cdedf80650f]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
  21:     0x7e02cbeb7d20 - rustc_middle[55fe5918396ccd80]::util::bug::bug_fmt
  22:     0x7e02cdf4f324 - rustc_symbol_mangling[1f67e53bc0a52e50]::typeid::typeid_itanium_cxx_abi::typeid_for_instance
  23:     0x7e02cbd7b7d2 - <rustc_codegen_llvm[eca60bb37ad821a4]::context::CodegenCx as rustc_codegen_ssa[cf87dacc1c61a2e2]::traits::declare::PreDefineMethods>::predefine_fn
  24:     0x7e02cf7024fb - rustc_codegen_llvm[eca60bb37ad821a4]::base::compile_codegen_unit::module_codegen
  25:     0x7e02cf6fe856 - <rustc_codegen_llvm[eca60bb37ad821a4]::LlvmCodegenBackend as rustc_codegen_ssa[cf87dacc1c61a2e2]::traits::backend::ExtraBackendMethods>::compile_codegen_unit
  26:     0x7e02cf88fb0f - rustc_codegen_ssa[cf87dacc1c61a2e2]::base::codegen_crate::<rustc_codegen_llvm[eca60bb37ad821a4]::LlvmCodegenBackend>
  27:     0x7e02cf8828a9 - <rustc_codegen_llvm[eca60bb37ad821a4]::LlvmCodegenBackend as rustc_codegen_ssa[cf87dacc1c61a2e2]::traits::backend::CodegenBackend>::codegen_crate
  28:     0x7e02cf88221f - rustc_interface[7babf4294a672537]::passes::start_codegen
  29:     0x7e02cf8819bd - <rustc_interface[7babf4294a672537]::queries::Queries>::codegen_and_build_linker
  30:     0x7e02cf658aeb - rustc_interface[7babf4294a672537]::interface::run_compiler::<core[e3c0811248e600b8]::result::Result<(), rustc_span[58a22cdedf80650f]::ErrorGuaranteed>, rustc_driver_impl[7d29d24e5efe687d]::run_compiler::{closure#0}>::{closure#0}
  31:     0x7e02cf7698e3 - std[1b6e1574881e4af5]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[7babf4294a672537]::util::run_in_thread_with_globals<rustc_interface[7babf4294a672537]::util::run_in_thread_pool_with_globals<rustc_interface[7babf4294a672537]::interface::run_compiler<core[e3c0811248e600b8]::result::Result<(), rustc_span[58a22cdedf80650f]::ErrorGuaranteed>, rustc_driver_impl[7d29d24e5efe687d]::run_compiler::{closure#0}>::{closure#0}, core[e3c0811248e600b8]::result::Result<(), rustc_span[58a22cdedf80650f]::ErrorGuaranteed>>::{closure#0}, core[e3c0811248e600b8]::result::Result<(), rustc_span[58a22cdedf80650f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e3c0811248e600b8]::result::Result<(), rustc_span[58a22cdedf80650f]::ErrorGuaranteed>>
  32:     0x7e02cf769710 - <<std[1b6e1574881e4af5]::thread::Builder>::spawn_unchecked_<rustc_interface[7babf4294a672537]::util::run_in_thread_with_globals<rustc_interface[7babf4294a672537]::util::run_in_thread_pool_with_globals<rustc_interface[7babf4294a672537]::interface::run_compiler<core[e3c0811248e600b8]::result::Result<(), rustc_span[58a22cdedf80650f]::ErrorGuaranteed>, rustc_driver_impl[7d29d24e5efe687d]::run_compiler::{closure#0}>::{closure#0}, core[e3c0811248e600b8]::result::Result<(), rustc_span[58a22cdedf80650f]::ErrorGuaranteed>>::{closure#0}, core[e3c0811248e600b8]::result::Result<(), rustc_span[58a22cdedf80650f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e3c0811248e600b8]::result::Result<(), rustc_span[58a22cdedf80650f]::ErrorGuaranteed>>::{closure#1} as core[e3c0811248e600b8]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  33:     0x7e02d0c85a49 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h56e8ce0a1b41a1a0
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/alloc/src/boxed.rs:2015:9
  34:     0x7e02d0c85a49 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6a8104fa0ae9471b
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/alloc/src/boxed.rs:2015:9
  35:     0x7e02d0c85a49 - std::sys::pal::unix::thread::Thread::new::thread_start::h40043a2934fc5170
                               at /rustc/60b5ca62752ecc25d578066c8b82e1a4887267d4/library/std/src/sys/pal/unix/thread.rs:108:17
  36:     0x7e02ca4a955a - <unknown>
  37:     0x7e02ca526a3c - <unknown>
  38:                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 1.79.0-nightly (60b5ca627 2024-03-25) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z sanitizer=cfi -C codegen-units=1 -C lto -Z dump-mir-dir=dir

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

[matthiaskrgr]

#123005 cc @maurer

[maurer]

@rustbot claim