Assigning anon struct to union variable causes trace/breakpoint trap

[chung-leong]

Zig Version

0.13.0-dev.73+db890dbae

Steps to Reproduce and Observed Behavior

Run test on the following code:

const BareUnion = union {
    dog: i32,
    cat: i32,
};
var bare_union: BareUnion = .{ .dog = 123 };

fn useDog() void {
    bare_union = .{ .dog = 777 };
}

test "useDog" {
    useDog();
}

Compilation bails out with the following message:

Trace/breakpoint trap (core dumped)

No error when the following variants are used instead:

fn useDog() void {
    bare_union = BareUnion{ .dog = 777 };
}

fn useDog() void {
    const c = .{ .dog = 777 };
    bare_union = c;
}

Expected Behavior

No error

[xdBronch]

looks like duplicate of #19832

[chung-leong]

I believe so.