#zig build-obj {
--name test -fno-emit-bin
-Mroot=test.zig
#}

#write test.zig {
export fn returns() void {
    while (optionalReturnError()) |_| {
        while (optionalReturnError()) |_| {
            return;
        } else |_| {
            if (_ == error.optionalReturnError) return;
        }
    }
}
fn optionalReturnError() !?u32 {
    return error.optionalReturnError;
}
#}
#update
#check errors {
test.zig:6:17: error: '_' used as an identifier without @"_" syntax
#}
