Assertion failed when casting argument to enum

[cbuttner]

enum Mouse_Button {
  LEFT,
  RIGHT,
  MIDDLE,
}

fn void foo(Mouse_Button button) {
}

fn void main() {
  uint x = 1;
  foo((Mouse_Button)x);
}

Assertion failed: (be_value->type->canonical == type), function llvm_emit_parameter, file llvm_codegen_expr.c, line 5137.

On dev branch.

[lerno]

Should work now.

[cbuttner]

Looks fixed.