tests/ui/recursion/issue-23302-1.rs - toolchain/rustc - Git at Google

 // Check that an enum with recursion in the discriminant throws
 // the appropriate error (rather than, say, blowing the stack).
 enum X {
     A = X::A as isize, //~ ERROR E0391
 }

 fn main() { }
	// Check that an enum with recursion in the discriminant throws
	// the appropriate error (rather than, say, blowing the stack).
	enum X {
	A = X::A as isize, //~ ERROR E0391
	}

	fn main() { }