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

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auto-reduced (treereduce-rust):

//@compile-flags: -frust-incomplete-and-experimental-compiler-do-not-use -frust-crate-attr=no_core
struct Bar;
struct Foo {
    bar: Bar,
}

fn foo(Foo { bar }: &Foo) {}

original:

struct Bar;
struct Foo { bar: Bar }

fn foo(Foo { bar }: &Foo) {}

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:285
0x32edd17 internal_error(char const*, ...)
	../../gcc/diagnostic-global-context.cc:787
0xc847b9 fancy_abort(char const*, int, char const*)
	../../gcc/diagnostics/context.cc:1813
0x927f94 Rust::HIR::StructPattern::is_refutable(Rust::TyTy::BaseType const&) const
	../../gcc/rust/hir/tree/rust-hir-pattern-abstract.cc:285
0x1199b6e Rust::Analysis::PatternChecker::visit(Rust::HIR::Function&)
	../../gcc/rust/checks/errors/rust-hir-pattern-analysis.cc:487
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.5TlMaCwXXl4l/rustc_testrunner_tmpdir_reporting.6eRl6PNHB6zD/mvce.rs -o/tmp/icemaker_global_tempdir.5TlMaCwXXl4l/rustc_testrunner_tmpdir_reporting.6eRl6PNHB6zD/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.

Reproduce the ICE with the reduced Rust snippet and command from the issue. Start at gcc/rust/hir/tree/rust-hir-pattern-abstract.cc:285, then read the caller in gcc/rust/checks/errors/rust-hir-pattern-analysis.cc:487. Done means the snippet no longer aborts in is_refutable.

Written by the indexing model from the issue text.

ICE in is_refutable, at rust/hir/tree/rust-hir-pattern-abstract.cc:285

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