tests/ui/parser/shebang/shebang-must-start-file.rs - third_party/rust - Git at Google

 // something on the first line for tidy
 #!/bin/bash  //~ ERROR expected `[`, found `/`

 //@ reference: shebang.position

 fn main() {
     println!("ok!");
 }
	// something on the first line for tidy
	#!/bin/bash //~ ERROR expected `[`, found `/`

	//@ reference: shebang.position

	fn main() {
	println!("ok!");
	}