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.
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.