Division by zero compiling initialisation of anonymous declaration

[amp-59]

Zig Version

0.13.0-dev.75+5c9eb4081

Steps to Reproduce and Observed Behaviour

Compile example program with zig build-obj nochk_abisize_0.zig
nochk_abisize_0.zig:

comptime {
    const t: extern struct {
        tag: enum(u8) { a, b },
        val: packed union { a: packed struct {}, b: packed struct {} },
    } = .{ .tag = .a, .val = .{ .a = .{} } };
    _ = t;
}

Output:

zig build-obj nochk_abisize_0.zig
Floating point exception