Internal compiler error assigning tagged union

[sjb3d]

Zig Version

0.13.0

Steps to Reproduce and Observed Behavior

I have been getting internal compiler errors on Zig 0.13.0, managed to reduce to a small repro case assigning a value to a struct that has a tagged union field:

var outer: Outer = undefined;

const Outer = struct {
    a: i32,
    b: u32,
    c: Inner,

    const Inner = union(enum) {
        none: void,
        something: u32,
    };
};

export fn foo() void {
    outer = .{
        .a = 0,
        .b = 1,
        .c = .{ .none = {} },
        //.c = Outer.Inner{ .none = {} },
    };
}

On godbolt this produces the following compiler output from both 0.13.0 and trunk (0.14.0-dev.2589+0df1f3df2):

Program terminated with signal: SIGTRAP
Compiler returned: 133

Interestingly, if I uncomment the alternative assignment for c above that uses an explicit type, then compilation succeeds. I am using this workaround with my own project for now too.

Expected Behavior

Compilation succeeds in the original code where the type is omitted.

[Rexicon226]

duplicate of #19832

[sjb3d]

Doh my search-fu failed me, please feel free to close in favour of the original report.

Would be great to fix this in the front-end if possible, as it is not clear at all for the end user what is causing the compiler error!