union/toString: crash/segfault: What's happening here?

[kdevel]

Thanks for the quick answer!

On Friday, 12 January 2018 at 02:16:39 UTC, Adam D. Ruppe wrote:
> On Friday, 12 January 2018 at 00:54:03 UTC, kdevel wrote:
>> $ dmd crash.d
>> $ ./crash
>
> Nicholas Wilson is right that you can use = "" to work around 
> it, but with strings, null is supposed to behave the same way.
>
> And this gives different (each wrong) behavior on -m32 vs -m64, 
> which leads me to believe you actually found a compiler bug.

dmd -O crash even produces a binary which segfaults on my machine.

> Calling u.toString directly also leads to random spam, which 
> means it isn't even the library.
>
> I'd file this as a compiler codegen bug.

https://issues.dlang.org/show_bug.cgi?id=18232