Aligncast crashes the compiler

[DutchGhost]

The following:

const Maybe = extern union {
    value: void,
    uninit: void,

    pub inline fn zeroed() Maybe {
        var u = Maybe{ .uninit = {} };
        var aligned_ptr = @alignCast(1, &u.value);

        return u;
    }
};

pub fn main() void {
    var maybe = Maybe.zeroed();
}

crashes the compiler:

Assertion failed at /deps/zig/src/analyze.cpp:565 in get_pointer_to_type_extra. This is a bug in the Zig compiler.
Unable to dump stack trace: debug info stripped

Program received signal SIGABRT, Aborted.
__restore_sigs (set=set@entry=0x7ffffffed240) at ./arch/x86_64/syscall_arch.h:40
40      ./arch/x86_64/syscall_arch.h: No such file or directory.
(gdb) backtrace
#0  __restore_sigs (set=set@entry=0x7ffffffed240) at ./arch/x86_64/syscall_arch.h:40
#1  0x000000000d11c274 in raise (sig=sig@entry=6) at src/signal/raise.c:11
#2  0x000000000d116098 in abort () at src/exit/abort.c:13
#3  0x00000000088dad76 in std.os.abort ()
#4  0x0000000000000000 in ?? ()
(gdb)

[nektro]

this now produces error: cannot adjust alignment of zero sized type '*void'

changing 1 to 0 produces error: alignment must be >= 1

[Vexu]

Fixed by #5969.