Tuple pattern as function parameter causes internal compiler error

[0xn4utilus]

I tried this code: https://godbolt.org/z/vTPqxfeMa

fn myfun((x, _): (i32, i32)) -> i32 {
   x
}

I expected it to compile correctly and just throw warning function myfun is never used.

But instead it caused internal compiler error.

[0xn4utilus]

Trying out different irrefutable patterns as parameters, will comment if any other pattern causes error.

[0xn4utilus]

While investigating this bug, I tried out this: https://godbolt.org/z/3s398sW1r

The below code compiles correctly.

fn myfun() -> i32 {
    let (x, a) =  (1, 2);
    x
}

This causes internal compiler error.

fn myfun() -> i32 {
    let (x, _) =  (1, 2);
    x
}

[CohenArthur]

ICE backtrace:

crab1: internal compiler error: in function_set_parameters, at rust/rust-gcc.cc:2284
0x236722c internal_error(char const*, ...)
	???:0
0x9fc228 fancy_abort(char const*, int, char const*)
	???:0
0xd8e28d Rust::Compile::HIRCompileBase::compile_function(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, 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 int, Rust::HIR::BlockExpr*, Rust::Resolver::CanonicalPath const*, Rust::TyTy::FnType*)
	???:0
0xd64d3a Rust::Compile::CompileItem::visit(Rust::HIR::Function&)
	???:0
0xb3c829 Rust::Compile::CompileCrate::go()
	???:0
0xb3c8a8 Rust::Compile::CompileCrate::Compile(Rust::HIR::Crate&, Rust::Compile::Context*)
	???:0
0xb37b7c Rust::Session::compile_crate(char const*)
	???:0
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Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
Compiler returned: 1