1export fn example() void {
 2    comptime foo() catch |err| switch (err) {};
 3}
 4var x: ?error{} = null;
 5fn foo() !void {
 6    return x.?;
 7}
 8// error
 9//
10// :6:13: error: unable to unwrap null
11// :2:17: note: called at comptime here