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ICE in is_refutable, at rust/hir/tree/rust-hir-pattern-abstract.cc:287 #4739

Description

@matthiaskrgr

auto-reduced (treereduce-rust):

//@compile-flags: -frust-incomplete-and-experimental-compiler-do-not-use -frust-crate-attr=no_core
enum Foo<'a> {
    Bar { field: &u64 },
}

fn in_let() {
    let y = 22;
    let foo = Foo::Bar { field: &y };

    let Foo::Bar::<'static> { field: _z } = foo;
}

original:

enum Foo<'a> {
    Bar { field: &u64 }
}

fn in_let() {
    let y = 22;
    let foo = Foo::Bar { field: &y };
    //~^ ERROR `y` does not live long enough
    let Foo::Bar::<'static> { field: _z } = foo;
}

fn in_match() {
    let y = 22;
    let foo = Foo::Bar { field: &y };
    //~^ ERROR `y` does not live long enough
    match foo {
        Foo::Bar::<'static> { field: _z } => {
        }
    }
}

fn main() { }

Version information:

c539964

Possibly related line of code:

bool
StructPattern::is_refutable (const TyTy::BaseType &scrutinee) const
{
const auto *inner = scrutinee.destructure ();
rust_assert (inner->get_kind () == TyTy::TypeKind::ADT);
const auto &adt = static_cast<const TyTy::ADTType &> (*inner);
rust_assert (!adt.is_enum ());
TyTy::VariantDef *variant = adt.get_variants ().at (0);
for (const auto &field : elems.get_struct_pattern_fields ())
{
switch (field->get_item_type ())
{

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:287
0x32edd17 internal_error(char const*, ...)
	../../gcc/diagnostic-global-context.cc:787
0xc847b9 fancy_abort(char const*, int, char const*)
	../../gcc/diagnostics/context.cc:1813
0x927fe6 Rust::HIR::StructPattern::is_refutable(Rust::TyTy::BaseType const&) const
	../../gcc/rust/hir/tree/rust-hir-pattern-abstract.cc:287
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.Kh0eHSMMkvzv/rustc_testrunner_tmpdir_reporting.iJly6HyW3yNc/mvce.rs -o/tmp/icemaker_global_tempdir.Kh0eHSMMkvzv/rustc_testrunner_tmpdir_reporting.iJly6HyW3yNc/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.

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