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const NextError = error{NextError};
const OtherError = error{OutOfMemory};
export fn entry() void {
const a: ?NextError!i32 = foo();
_ = a;
}
fn foo() ?OtherError!i32 {
return null;
}
// error
// backend=llvm
// target=native
//
// :4:1: error: expected type '?error{NextError}!i32', found '?error{OutOfMemory}!i32'
// :4:1: note: optional type child 'error{OutOfMemory}!i32' cannot cast into optional type child 'error{NextError}!i32'
// :4:1: note: 'error.OutOfMemory' not a member of destination error set
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