ICE: thread 'rustc' panicked at 'index out of bounds: the len is 1 but the index is 1', compiler/rustc_abi/src/lib.rs:1195:59

[Mari-W]

Code

#![allow(incomplete_features)]
#![feature(const_trait_impl)]
#![feature(const_closures)]
#![feature(const_refs_to_cell)]
#![feature(type_alias_impl_trait)]

pub type Diff = impl ~const std::marker::Destruct + ~const Fn(usize) -> usize;

pub const fn lift(n: usize) -> Diff {
    const move |m: usize| m + n
}

pub const fn reify(n: Diff) -> usize {
    n(0)
}

pub const fn add(
    n: Diff,
    m: Diff,
) -> Diff {
    const move |x: usize| m(n(x))
}

Meta

rustc --version --verbose:

rustc 1.72.0-nightly (0ab38e95b 2023-07-03)
binary: rustc
commit-hash: 0ab38e95bb1cbf0bd038d359bdecbfa501f003a7
commit-date: 2023-07-03
host: x86_64-unknown-linux-gnu
release: 1.72.0-nightly
LLVM version: 16.0.5

Error output

could not compile `unnamed-lib` (lib)

Backtrace

thread 'rustc' panicked at 'index out of bounds: the len is 1 but the index is 1', /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/compiler/rustc_abi/src/lib.rs:1195:59
stack backtrace:
   0:     0x7ff77b4ffac1 - std::backtrace_rs::backtrace::libunwind::trace::h468530b9ed459a5e
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7ff77b4ffac1 - std::backtrace_rs::backtrace::trace_unsynchronized::h1a2d5b62e76fd25f
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7ff77b4ffac1 - std::sys_common::backtrace::_print_fmt::h260037bf2065d399
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7ff77b4ffac1 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hd7fc81831607cf60
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7ff77b565dcf - core::fmt::rt::Argument::fmt::h01afab03bee30eeb
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/core/src/fmt/rt.rs:138:9
   5:     0x7ff77b565dcf - core::fmt::write::h83c42ba3ca76c4aa
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/core/src/fmt/mod.rs:1094:21
   6:     0x7ff77b4f2407 - std::io::Write::write_fmt::h2430223c04b84a0f
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/io/mod.rs:1714:15
   7:     0x7ff77b4ff8d5 - std::sys_common::backtrace::_print::h7c08448e622e2b58
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7ff77b4ff8d5 - std::sys_common::backtrace::print::h8f55173e6a80d5ad
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7ff77b5026b3 - std::panicking::default_hook::{{closure}}::heb93e2549b3b187f
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/panicking.rs:269:22
  10:     0x7ff77b502444 - std::panicking::default_hook::h915abe4b17644eca
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/panicking.rs:288:9
  11:     0x7ff77a2bf97b - <rustc_driver_impl[146e28695489c3b6]::install_ice_hook::{closure#0} as core[cc24119d2f561fcf]::ops::function::FnOnce<(&core[cc24119d2f561fcf]::panic::panic_info::PanicInfo,)>>::call_once::{shim:vtable#0}
  12:     0x7ff77b502ede - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h092e69b77f2ec5c7
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/alloc/src/boxed.rs:2024:9
  13:     0x7ff77b502ede - std::panicking::rust_panic_with_hook::ha1753497d761687d
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/panicking.rs:709:13
  14:     0x7ff77b502c67 - std::panicking::begin_panic_handler::{{closure}}::h94f1c0e8e158230f
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/panicking.rs:597:13
  15:     0x7ff77b4fff26 - std::sys_common::backtrace::__rust_end_short_backtrace::h8f0ed1c8ce3bb685
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/sys_common/backtrace.rs:151:18
  16:     0x7ff77b5029b2 - rust_begin_unwind
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/panicking.rs:593:5
  17:     0x7ff77b562023 - core::panicking::panic_fmt::hd946f96734ef59b2
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/core/src/panicking.rs:67:14
  18:     0x7ff77b562182 - core::panicking::panic_bounds_check::h9afa51f49491098b
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/core/src/panicking.rs:162:5
  19:     0x7ff7793089cd - <rustc_const_eval[d9bc543eca73fa59]::interpret::eval_context::InterpCx<rustc_mir_transform[5aa385746779acac]::const_prop::ConstPropMachine>>::place_field
  20:     0x7ff7792f567d - <rustc_const_eval[d9bc543eca73fa59]::interpret::eval_context::InterpCx<rustc_mir_transform[5aa385746779acac]::const_prop::ConstPropMachine>>::eval_rvalue_into_place
  21:     0x7ff7792e71a7 - <rustc_mir_transform[5aa385746779acac]::const_prop_lint::ConstPropagator as rustc_middle[e56c0de64a470188]::mir::visit::Visitor>::visit_basic_block_data
  22:     0x7ff7792e1c62 - <rustc_mir_transform[5aa385746779acac]::const_prop_lint::ConstProp as rustc_mir_transform[5aa385746779acac]::pass_manager::MirLint>::run_lint
  23:     0x7ff778b0dab6 - rustc_mir_transform[5aa385746779acac]::mir_drops_elaborated_and_const_checked
  24:     0x7ff7782e194e - rustc_query_impl[5e6cc1cea09d293]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5e6cc1cea09d293]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e56c0de64a470188]::query::erase::Erased<[u8; 8usize]>>
  25:     0x7ff7782e191e - <rustc_query_impl[5e6cc1cea09d293]::query_impl::mir_drops_elaborated_and_const_checked::dynamic_query::{closure#2} as core[cc24119d2f561fcf]::ops::function::FnOnce<(rustc_middle[e56c0de64a470188]::ty::context::TyCtxt, rustc_span[5b039f53ab17f7a0]::def_id::LocalDefId)>>::call_once
  26:     0x7ff7793b8dcd - rustc_query_system[3139d05a59a2b03]::query::plumbing::try_execute_query::<rustc_query_impl[5e6cc1cea09d293]::DynamicConfig<rustc_query_system[3139d05a59a2b03]::query::caches::VecCache<rustc_span[5b039f53ab17f7a0]::def_id::LocalDefId, rustc_middle[e56c0de64a470188]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[5e6cc1cea09d293]::plumbing::QueryCtxt, true>
  27:     0x7ff779c26049 - rustc_query_impl[5e6cc1cea09d293]::query_impl::mir_drops_elaborated_and_const_checked::get_query_incr::__rust_end_short_backtrace
  28:     0x7ff7796e2009 - <rustc_session[1d3a915322f525ec]::session::Session>::time::<(), rustc_interface[a6e5b8ea369f438f]::passes::analysis::{closure#2}>
  29:     0x7ff7796dd815 - rustc_interface[a6e5b8ea369f438f]::passes::analysis
  30:     0x7ff77977f00a - rustc_query_impl[5e6cc1cea09d293]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5e6cc1cea09d293]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[e56c0de64a470188]::query::erase::Erased<[u8; 1usize]>>
  31:     0x7ff77977eff9 - <rustc_query_impl[5e6cc1cea09d293]::query_impl::analysis::dynamic_query::{closure#2} as core[cc24119d2f561fcf]::ops::function::FnOnce<(rustc_middle[e56c0de64a470188]::ty::context::TyCtxt, ())>>::call_once
  32:     0x7ff779a7a23f - rustc_query_system[3139d05a59a2b03]::query::plumbing::try_execute_query::<rustc_query_impl[5e6cc1cea09d293]::DynamicConfig<rustc_query_system[3139d05a59a2b03]::query::caches::SingleCache<rustc_middle[e56c0de64a470188]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[5e6cc1cea09d293]::plumbing::QueryCtxt, true>
  33:     0x7ff779a79de4 - rustc_query_impl[5e6cc1cea09d293]::query_impl::analysis::get_query_incr::__rust_end_short_backtrace
  34:     0x7ff779446bd5 - <rustc_middle[e56c0de64a470188]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[146e28695489c3b6]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>>
  35:     0x7ff779446202 - <rustc_interface[a6e5b8ea369f438f]::interface::Compiler>::enter::<rustc_driver_impl[146e28695489c3b6]::run_compiler::{closure#1}::{closure#2}, core[cc24119d2f561fcf]::result::Result<core[cc24119d2f561fcf]::option::Option<rustc_interface[a6e5b8ea369f438f]::queries::Linker>, rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>>
  36:     0x7ff77943cd25 - rustc_span[5b039f53ab17f7a0]::set_source_map::<core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>, rustc_interface[a6e5b8ea369f438f]::interface::run_compiler<core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>, rustc_driver_impl[146e28695489c3b6]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  37:     0x7ff77943c146 - <scoped_tls[65afcd617045176b]::ScopedKey<rustc_span[5b039f53ab17f7a0]::SessionGlobals>>::set::<rustc_interface[a6e5b8ea369f438f]::interface::run_compiler<core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>, rustc_driver_impl[146e28695489c3b6]::run_compiler::{closure#1}>::{closure#0}, core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>>
  38:     0x7ff77943b70c - std[adcf6cea4a8307ac]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[a6e5b8ea369f438f]::util::run_in_thread_pool_with_globals<rustc_interface[a6e5b8ea369f438f]::interface::run_compiler<core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>, rustc_driver_impl[146e28695489c3b6]::run_compiler::{closure#1}>::{closure#0}, core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>>
  39:     0x7ff779b094fe - <<std[adcf6cea4a8307ac]::thread::Builder>::spawn_unchecked_<rustc_interface[a6e5b8ea369f438f]::util::run_in_thread_pool_with_globals<rustc_interface[a6e5b8ea369f438f]::interface::run_compiler<core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>, rustc_driver_impl[146e28695489c3b6]::run_compiler::{closure#1}>::{closure#0}, core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[cc24119d2f561fcf]::result::Result<(), rustc_span[5b039f53ab17f7a0]::ErrorGuaranteed>>::{closure#1} as core[cc24119d2f561fcf]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  40:     0x7ff77b50d355 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hfb71eecc96172696
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/alloc/src/boxed.rs:2010:9
  41:     0x7ff77b50d355 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::ha18d3bb12fa77a3c
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/alloc/src/boxed.rs:2010:9
  42:     0x7ff77b50d355 - std::sys::unix::thread::Thread::new::thread_start::h827451defd93f6e7
                               at /rustc/0ab38e95bb1cbf0bd038d359bdecbfa501f003a7/library/std/src/sys/unix/thread.rs:108:17
  43:     0x7ff776c94b43 - start_thread
                               at ./nptl/pthread_create.c:442:8
  44:     0x7ff776d26a00 - clone3
                               at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
  45:                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: rustc 1.72.0-nightly (0ab38e95b 2023-07-03) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -C embed-bitcode=no -C debuginfo=2 -C linker=x86_64-linux-gnu-gcc -C incremental=[REDACTED]

note: some of the compiler flags provided by cargo are hidden

query stack during panic:
#0 [mir_drops_elaborated_and_const_checked] elaborating drops for `add`
#1 [analysis] running analysis passes on this crate
end of query stack
error: could not compile `unnamed-lib` (lib)

[clubby789]

error: internal compiler error: compiler/rustc_const_eval/src/interpret/eval_context.rs:390:21: expected type differs from actual type.
                                expected: usize
                                actual: [closure@../poc.rs:10:5: 10:26]
  --> ../poc.rs:17:1
   |
17 | / pub const fn add(
18 | |     n: Diff,
19 | |     m: Diff,
20 | | ) -> Diff {
   | |_________^

Can be reduced to

#![feature(type_alias_impl_trait)]

pub type Diff = impl Fn(usize) -> usize;

pub fn lift(n: usize) -> Diff {
    move |m: usize| m + n
}

pub fn add(
    f: Diff,
) -> Diff {
    move |x: usize| f(x)
}

fn main() {}

[clubby789]

pub fn lift() -> Diff {
    |_: usize |loop {}
}

Also causes the out of bounds panic (len is 0 but the index is 0), but not the earlier type mismatch ICE

[JohnTitor]

Triage: Fixed on the latest nightly, marked as E-needs-test
@rustbot labels: +E-needs-test