ICE in is_refutable, at rust/hir/tree/rust-hir-patte... | Rust-GCC/gccrs

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snippet:

//@compile-flags: -frust-incomplete-and-experimental-compiler-do-not-use -frust-crate-attr=no_core
fn main() {
    let &[0] = &[0] as &[_];
}

Version information:

c539964b8cc842e871d77b45150df6a5882335fb

Command:
/home/matthias/vcs/github/gccrs/gccrs-build/gcc/crab1 -frust-incomplete-and-experimental-compiler-do-not-use -frust-crate-attr=no_core -frust-crate-attr=feature(no_core)

Program output

crab1: internal compiler error: in is_refutable, at rust/hir/tree/rust-hir-pattern-abstract.cc:103
0x32edd17 internal_error(char const*, ...)
	../../gcc/diagnostic-global-context.cc:787
0xc847b9 fancy_abort(char const*, int, char const*)
	../../gcc/diagnostics/context.cc:1813
0x92802c Rust::HIR::SlicePattern::is_refutable(Rust::TyTy::BaseType const&) const
	../../gcc/rust/hir/tree/rust-hir-pattern-abstract.cc:103
0x1199a59 Rust::Analysis::PatternChecker::visit(Rust::HIR::LetStmt&)
	../../gcc/rust/checks/errors/rust-hir-pattern-analysis.cc:702
0x1199593 Rust::Analysis::PatternChecker::visit(Rust::HIR::BlockExpr&)
	../../gcc/rust/checks/errors/rust-hir-pattern-analysis.cc:281
0x119a4e3 Rust::Analysis::PatternChecker::go(Rust::HIR::Crate&)
	../../gcc/rust/checks/errors/rust-hir-pattern-analysis.cc:46
0xecc43b Rust::Session::compile_crate(char const*)
	../../gcc/rust/rust-session-manager.cc:815
/home/matthias/vcs/github/gccrs/gccrs-build/gcc/crab1 /tmp/icemaker_global_tempdir.B2FG2Wbdt9GO/rustc_testrunner_tmpdir_reporting.GUJy1iwKCpJK/mvce.rs -o/tmp/icemaker_global_tempdir.B2FG2Wbdt9GO/rustc_testrunner_tmpdir_reporting.GUJy1iwKCpJK/binaryname -frust-incomplete-and-experimental-compiler-do-not-use -frust-crate-attr=no_core -frust-crate-attr=feature(no_core)
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

Start by running the supplied Rust snippet with the listed gccrs flags and confirm the ICE. Inspect is_refutable in gcc/rust/hir/tree/rust-hir-pattern-abstract.cc around line 103, then follow its call from rust-hir-pattern-analysis.cc:702. Done means the reproducer no longer triggers an internal compiler error and the behavior is covered by a regression test.

Written by the indexing model from the issue text.

ICE in is_refutable, at rust/hir/tree/rust-hir-pattern-abstract.cc:103

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