Segfault with tagged union

[lxn]

Using Zig from zig-windows-x86_64-0.8.0-dev.1431+c760532be.zip on Windows 10.

const std = @import("std");

pub fn main() void {
    const b1 = Baz{ .quux = 1 };
    std.debug.print("1: {}\n", .{Foo{ .baz = b1 }});

    const b2 = Baz.init(2);
    std.debug.print("2: {}\n", .{Foo{ .baz = b2 }});
}

const Foo = union(enum) {
    bar: i32,
    baz: Baz,
};

const Baz = struct {
    quux: i32,

    pub fn init(the_quux: i32) @This() {
        return .{ .quux = the_quux };
    }
};

Output:

1: Foo{ .baz = Baz{ .quux = 1 } }
Segmentation fault at address 0x7ff6afd7c5e8
C:\devel\Zig\projects\playground\union_segfault_repro\src\main.zig:8:39: 0x7ff6afd430ce in main (union_segfault_repro.obj)
    std.debug.print("2: {}\n", .{Foo{ .baz = b2 }});
                                      ^
C:\devel\Zig\zig-windows-x86_64\lib\zig\std\start.zig:174:65: 0x7ff6afd41a87 in std.start.WinStartup (union_segfault_repro.obj)
    std.os.windows.kernel32.ExitProcess(initEventLoopAndCallMain());
                                                                ^

[Vexu]

Duplicate of #3915.