ICE: None compiler/rustc_lint/src/array_into_iter.rs

[matthiaskrgr]

auto-reduced (treereduce-rust):

fn get(c: Self::ItemsIterator) {
    c.into_iter();
}

original:

//@ run-pass

// https://github.com/rust-lang/rust/issues/27918

fn get(c: Self::ItemsIterator) {
        c.into_iter();
    }

Version information

rustc 1.78.0-nightly (21033f637 2024-02-23)
binary: rustc
commit-hash: 21033f637e60af61ead04cc296e7214f89c16a95
commit-date: 2024-02-23
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 18.1.0

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc --crate-type=lib

Program output

warning: function `get` is never used
 --> /tmp/icemaker_global_tempdir.vhaPtHdb1FeA/rustc_testrunner_tmpdir_reporting.F8OB7kO3mXxn/mvce.rs:1:4
  |
1 | fn get(c: Self::ItemsIterator) {
  |    ^^^
  |
  = note: `#[warn(dead_code)]` on by default

thread 'rustc' panicked at compiler/rustc_lint/src/array_into_iter.rs:73:81:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0:     0x7f2a7a38caf6 - std::backtrace_rs::backtrace::libunwind::trace::h60f23a8e58351682
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7f2a7a38caf6 - std::backtrace_rs::backtrace::trace_unsynchronized::h671424485388f22e
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f2a7a38caf6 - std::sys_common::backtrace::_print_fmt::h31f7ee25ad0ff49b
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7f2a7a38caf6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h0e77fc93e0d457cf
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f2a7a3dda7c - core::fmt::rt::Argument::fmt::h8216f090320db7ad
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/core/src/fmt/rt.rs:142:9
   5:     0x7f2a7a3dda7c - core::fmt::write::h1d8b18e3b267ed00
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/core/src/fmt/mod.rs:1120:17
   6:     0x7f2a7a38142f - std::io::Write::write_fmt::h1ed04430cc1e2dac
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/io/mod.rs:1846:15
   7:     0x7f2a7a38c8a4 - std::sys_common::backtrace::_print::h1ef5a88c19d88b2a
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7f2a7a38c8a4 - std::sys_common::backtrace::print::h12cc4d72a0d4779f
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7f2a7a38f5eb - std::panicking::default_hook::{{closure}}::hc148c602f99e7293
  10:     0x7f2a7a38f339 - std::panicking::default_hook::ha46c3294b51887c8
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/panicking.rs:292:9
  11:     0x7f2a7d284f0c - std[20f0fad640e3d674]::panicking::update_hook::<alloc[3412762e68fb4927]::boxed::Box<rustc_driver_impl[19440ca52c60811e]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7f2a7a38fd50 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h7282ed154eb4643b
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/alloc/src/boxed.rs:2030:9
  13:     0x7f2a7a38fd50 - std::panicking::rust_panic_with_hook::h8c9157629cfdb90a
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/panicking.rs:786:13
  14:     0x7f2a7a38fa59 - std::panicking::begin_panic_handler::{{closure}}::h29c17d84617d8410
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/panicking.rs:652:13
  15:     0x7f2a7a38cfd6 - std::sys_common::backtrace::__rust_end_short_backtrace::h060d631f407f1eb0
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/sys_common/backtrace.rs:171:18
  16:     0x7f2a7a38f7c4 - rust_begin_unwind
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/panicking.rs:648:5
  17:     0x7f2a7a3d9f95 - core::panicking::panic_fmt::h77781cf8a5959a4c
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/core/src/panicking.rs:72:14
  18:     0x7f2a7a3da053 - core::panicking::panic::h0157b3d9e1a77c4c
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/core/src/panicking.rs:144:5
  19:     0x7f2a7a3d9d26 - core::option::unwrap_failed::h14aef3d216c7ab4d
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/core/src/option.rs:1985:5
  20:     0x7f2a7e8857ca - <rustc_lint[8330924c420f60f8]::BuiltinCombinedModuleLateLintPass as rustc_lint[8330924c420f60f8]::passes::LateLintPass>::check_expr
  21:     0x7f2a7e87aa85 - <rustc_lint[8330924c420f60f8]::late::LateContextAndPass<rustc_lint[8330924c420f60f8]::BuiltinCombinedModuleLateLintPass> as rustc_hir[40a16d3090892c1]::intravisit::Visitor>::visit_expr
  22:     0x7f2a7e879560 - <rustc_lint[8330924c420f60f8]::late::LateContextAndPass<rustc_lint[8330924c420f60f8]::BuiltinCombinedModuleLateLintPass> as rustc_hir[40a16d3090892c1]::intravisit::Visitor>::visit_block
  23:     0x7f2a7e87a433 - <rustc_lint[8330924c420f60f8]::late::LateContextAndPass<rustc_lint[8330924c420f60f8]::BuiltinCombinedModuleLateLintPass> as rustc_hir[40a16d3090892c1]::intravisit::Visitor>::visit_expr::{closure#0}
  24:     0x7f2a7e9df291 - <rustc_lint[8330924c420f60f8]::late::LateContextAndPass<rustc_lint[8330924c420f60f8]::BuiltinCombinedModuleLateLintPass> as rustc_hir[40a16d3090892c1]::intravisit::Visitor>::visit_nested_body
  25:     0x7f2a7e936ee5 - <rustc_lint[8330924c420f60f8]::late::LateContextAndPass<rustc_lint[8330924c420f60f8]::BuiltinCombinedModuleLateLintPass> as rustc_hir[40a16d3090892c1]::intravisit::Visitor>::visit_nested_item
  26:     0x7f2a7e9352cb - rustc_lint[8330924c420f60f8]::lint_mod
  27:     0x7f2a7e9350c9 - rustc_query_impl[9020f783ef910edf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9020f783ef910edf]::query_impl::lint_mod::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc311d42f6fbb53]::query::erase::Erased<[u8; 0usize]>>
  28:     0x7f2a7f1dc52d - rustc_query_system[5b12415689825661]::query::plumbing::try_execute_query::<rustc_query_impl[9020f783ef910edf]::DynamicConfig<rustc_query_system[5b12415689825661]::query::caches::DefaultCache<rustc_span[28fcb2c35e4f80e4]::def_id::LocalModDefId, rustc_middle[2cc311d42f6fbb53]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[9020f783ef910edf]::plumbing::QueryCtxt, false>
  29:     0x7f2a7f1dae3f - rustc_query_impl[9020f783ef910edf]::query_impl::lint_mod::get_query_non_incr::__rust_end_short_backtrace
  30:     0x7f2a7f1da9df - rustc_lint[8330924c420f60f8]::late::check_crate::{closure#1}
  31:     0x7f2a7f1da3de - rustc_lint[8330924c420f60f8]::late::check_crate
  32:     0x7f2a7f1d42e5 - rustc_interface[379ca6a066e5a6d0]::passes::analysis
  33:     0x7f2a7f1d2fd9 - rustc_query_impl[9020f783ef910edf]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9020f783ef910edf]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc311d42f6fbb53]::query::erase::Erased<[u8; 1usize]>>
  34:     0x7f2a7f322be5 - rustc_query_system[5b12415689825661]::query::plumbing::try_execute_query::<rustc_query_impl[9020f783ef910edf]::DynamicConfig<rustc_query_system[5b12415689825661]::query::caches::SingleCache<rustc_middle[2cc311d42f6fbb53]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[9020f783ef910edf]::plumbing::QueryCtxt, false>
  35:     0x7f2a7f322949 - rustc_query_impl[9020f783ef910edf]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  36:     0x7f2a7f331e16 - rustc_interface[379ca6a066e5a6d0]::interface::run_compiler::<core[d2fcf87132106612]::result::Result<(), rustc_span[28fcb2c35e4f80e4]::ErrorGuaranteed>, rustc_driver_impl[19440ca52c60811e]::run_compiler::{closure#0}>::{closure#0}
  37:     0x7f2a7f5c5fc5 - std[20f0fad640e3d674]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[379ca6a066e5a6d0]::util::run_in_thread_with_globals<rustc_interface[379ca6a066e5a6d0]::util::run_in_thread_pool_with_globals<rustc_interface[379ca6a066e5a6d0]::interface::run_compiler<core[d2fcf87132106612]::result::Result<(), rustc_span[28fcb2c35e4f80e4]::ErrorGuaranteed>, rustc_driver_impl[19440ca52c60811e]::run_compiler::{closure#0}>::{closure#0}, core[d2fcf87132106612]::result::Result<(), rustc_span[28fcb2c35e4f80e4]::ErrorGuaranteed>>::{closure#0}, core[d2fcf87132106612]::result::Result<(), rustc_span[28fcb2c35e4f80e4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d2fcf87132106612]::result::Result<(), rustc_span[28fcb2c35e4f80e4]::ErrorGuaranteed>>
  38:     0x7f2a7f5c5df2 - <<std[20f0fad640e3d674]::thread::Builder>::spawn_unchecked_<rustc_interface[379ca6a066e5a6d0]::util::run_in_thread_with_globals<rustc_interface[379ca6a066e5a6d0]::util::run_in_thread_pool_with_globals<rustc_interface[379ca6a066e5a6d0]::interface::run_compiler<core[d2fcf87132106612]::result::Result<(), rustc_span[28fcb2c35e4f80e4]::ErrorGuaranteed>, rustc_driver_impl[19440ca52c60811e]::run_compiler::{closure#0}>::{closure#0}, core[d2fcf87132106612]::result::Result<(), rustc_span[28fcb2c35e4f80e4]::ErrorGuaranteed>>::{closure#0}, core[d2fcf87132106612]::result::Result<(), rustc_span[28fcb2c35e4f80e4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d2fcf87132106612]::result::Result<(), rustc_span[28fcb2c35e4f80e4]::ErrorGuaranteed>>::{closure#1} as core[d2fcf87132106612]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  39:     0x7f2a7a399725 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h371a32ff78509abd
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/alloc/src/boxed.rs:2016:9
  40:     0x7f2a7a399725 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h07b273703e10642f
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/alloc/src/boxed.rs:2016:9
  41:     0x7f2a7a399725 - std::sys::pal::unix::thread::Thread::new::thread_start::hfbd20cf5ee647cad
                               at /rustc/21033f637e60af61ead04cc296e7214f89c16a95/library/std/src/sys/pal/unix/thread.rs:108:17
  42:     0x7f2a7a18055a - <unknown>
  43:     0x7f2a7a1fda3c - <unknown>
  44:                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 1.78.0-nightly (21033f637 2024-02-23) running on x86_64-unknown-linux-gnu

note: compiler flags: --crate-type lib -Z dump-mir-dir=dir

query stack during panic:
#0 [lint_mod] linting top-level module
#1 [analysis] running analysis passes on this crate
end of query stack
error[E0433]: failed to resolve: `Self` is only available in impls, traits, and type definitions
 --> /tmp/icemaker_global_tempdir.vhaPtHdb1FeA/rustc_testrunner_tmpdir_reporting.F8OB7kO3mXxn/mvce.rs:1:11
  |
1 | fn get(c: Self::ItemsIterator) {
  |           ^^^^ `Self` is only available in impls, traits, and type definitions

error: aborting due to 1 previous error; 1 warning emitted

For more information about this error, try `rustc --explain E0433`.

[matthiaskrgr]

#121206 cc @nnethercote

[gurry]

@rustbot claim

[gurry]

The ICE occurs due to the unwrap() on this line:

rust/compiler/rustc_lint/src/array_into_iter.rs

Line 73 in 43fdd49

let def_id = cx.typeck_results().type_dependent_def_id(expr.hir_id).unwrap();

The underlying reason is that typeck result is tainted due to the bad arg type Self::ItemsIterator in the user's code and type_dependent_def_id() therefore returns None.