tests/ui/error-codes/E0124.rs - toolchain/rustc - Git at Google

 struct Foo {
     field1: i32,
     field1: i32,
     //~^ ERROR field `field1` is already declared [E0124]
 }

 fn main() {
 }
	struct Foo {
	field1: i32,
	field1: i32,
	//~^ ERROR field `field1` is already declared [E0124]
	}

	fn main() {
	}