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

#write test.zig {
const Enum = enum(u32) { b, a };
const TaggedUnion = union(Enum) {
    b: []const u8,
    a: []const u8,
};
export fn entry() void {
    const result = TaggedUnion{ .b = "b" };
    _ = result.b;
    _ = result.a;
}
export fn entry1() void {
    const result = TaggedUnion{ .b = "b" };
    _ = &result.b;
    _ = &result.a;
}
#}
#update
#check errors {
test.zig:9:15: error: access of union field 'a' while field 'b' is active
test.zig:2:21: note: union declared here
test.zig:14:16: error: access of union field 'a' while field 'b' is active
test.zig:2:21: note: union declared here
#}
