ICE in lookup_label_temp_var, at rust/backend/rust-c... | Rust-GCC/gccrs

auto-reduced (treereduce-rust):

//@compile-flags: -frust-incomplete-and-experimental-compiler-do-not-use
#![feature(no_core)]
#![no_core]

fn main() {
    let x = 'c: loop {
        break 'c 5;
    };
}

original:

#![feature(no_core)]
#![no_core]
// rustfmt-trailing_semicolon: false

#![feature(loop_break_value)]

fn main() {
    'a: loop {
        break 'a
    }

    let mut done = false;
    'b: while !done {
        done = true;
        continue 'b
    }

    let x = loop {
        break 5
    };

    let x = 'c: loop {
        break 'c 5
    };
}

fn foo() -> usize {
    return 0
}

Version information:

696cb485cfa9969c952d6765889d82ed548ca15c

Command:
/home/matthias/vcs/github/gccrs/gccrs-build/gcc/crab1 -frust-incomplete-and-experimental-compiler-do-not-use

Program output

crab1: internal compiler error: in lookup_label_temp_var, at rust/backend/rust-compile-expr.cc:2820
0x32c0107 internal_error(char const*, ...)
	../../gcc/diagnostic-global-context.cc:787
0xc7e0b1 fancy_abort(char const*, int, char const*)
	../../gcc/diagnostics/context.cc:1813
0x927f8d Rust::Compile::CompileExpr::lookup_label_temp_var(unsigned int)
	../../gcc/rust/backend/rust-compile-expr.cc:2820
0x927f8d Rust::Compile::CompileExpr::lookup_label_temp_var(unsigned int)
	../../gcc/rust/backend/rust-compile-expr.cc:2814
0x11be4be Rust::Compile::CompileExpr::visit(Rust::HIR::BreakExpr&)
	../../gcc/rust/backend/rust-compile-expr.cc:870
0x11b9d86 Rust::Compile::CompileExpr::Compile(Rust::HIR::Expr&, Rust::Compile::Context*)
	../../gcc/rust/backend/rust-compile-expr.cc:56
0x11afde0 ???
	../../gcc/rust/backend/rust-compile-stmt.h:33
0x11b018c Rust::Compile::CompileStmt::Compile(Rust::HIR::Stmt*, Rust::Compile::Context*)
	../../gcc/rust/backend/rust-compile-stmt.cc:36
0x11cad8b Rust::Compile::CompileBlock::visit(Rust::HIR::BlockExpr&)
	../../gcc/rust/backend/rust-compile-block.cc:55
0x11cb84e Rust::Compile::CompileBlock::compile(Rust::HIR::BlockExpr&, Rust::Compile::Context*, Bvariable*)
	../../gcc/rust/backend/rust-compile-block.cc:36
0x11b8d3d Rust::Compile::CompileExpr::visit(Rust::HIR::LoopExpr&)
	../../gcc/rust/backend/rust-compile-expr.cc:792
0x11b9d86 Rust::Compile::CompileExpr::Compile(Rust::HIR::Expr&, Rust::Compile::Context*)
	../../gcc/rust/backend/rust-compile-expr.cc:56
0x11aff9e Rust::Compile::CompileStmt::visit(Rust::HIR::LetStmt&)
	../../gcc/rust/backend/rust-compile-stmt.cc:74
0x11b018c Rust::Compile::CompileStmt::Compile(Rust::HIR::Stmt*, Rust::Compile::Context*)
	../../gcc/rust/backend/rust-compile-stmt.cc:36
0x11e858b Rust::Compile::HIRCompileBase::compile_function_body(tree_node*, Rust::HIR::BlockExpr&, Rust::TyTy::BaseType*)
	../../gcc/rust/backend/rust-compile-base.cc:681
0x11e9ed3 Rust::Compile::HIRCompileBase::compile_function(bool, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, tl::optional<Rust::HIR::SelfParam>&, std::vector<Rust::HIR::FunctionParam, std::allocator<Rust::HIR::FunctionParam> >&, Rust::HIR::FunctionQualifiers const&, Rust::HIR::Visibility&, std::vector<Rust::AST::Attribute, std::allocator<Rust::AST::Attribute> >&, unsigned long, Rust::HIR::BlockExpr*, Rust::Resolver::CanonicalPath const&, Rust::TyTy::FnType*)
	../../gcc/rust/backend/rust-compile-base.cc:886
0x11ace06 Rust::Compile::CompileItem::visit(Rust::HIR::Function&)
	../../gcc/rust/backend/rust-compile-item.cc:235
0xed334b Rust::Compile::CompileItem::compile(Rust::HIR::Item*, Rust::Compile::Context*, Rust::TyTy::BaseType*, unsigned long)
	../../gcc/rust/backend/rust-compile-item.h:37
0xed334b Rust::Compile::CompileCrate::go()
	../../gcc/rust/backend/rust-compile.cc:48
0xed334b Rust::Compile::CompileCrate::Compile(Rust::HIR::Crate&, Rust::Compile::Context*)
	../../gcc/rust/backend/rust-compile.cc:41
/home/matthias/vcs/github/gccrs/gccrs-build/gcc/crab1 /tmp/icemaker_global_tempdir.mvX4OLoQFu8L/rustc_testrunner_tmpdir_reporting.ILo4ZzXVQUoG/mvce.rs -o/tmp/icemaker_global_tempdir.mvX4OLoQFu8L/rustc_testrunner_tmpdir_reporting.ILo4ZzXVQUoG/binaryname -frust-incomplete-and-experimental-compiler-do-not-use
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.

ICE in lookup_label_temp_var, at rust/backend/rust-compile-expr.cc

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