array.reverse segfaults

[Tomas Lindquist Olsen]

Tomas Lindquist Olsen wrote:
> Moritz Warning wrote:
>> Hi,
>>
>> This piece of code segfaults on Debian Linux (with dmd 1.035):
>> Can someone tell me why?
>>
>> char[] get(char[] str)
>> {
>>     return new char[](4);
>> }
>>
>> void main(char[][] args)
>> {
>>     char[] str =  get("abc");
>>    char[] reversed = str.reverse; // <-- access violation
>> }
> 
> Simpler version:
> 
> void main()
> {
>     char[4] str;
>     str.reverse;
> }
> 
> Crashes in _adReverseChar when trying to memmove (3 - 255) bytes ;)
> 
> My best guess is that is just doesn't handle char.init values properly!

When it tries to get the lower stride, it gets 0xFF from the table, but it doesn't check if 
this value is usable.

Probably just ignoring these invalid bytes would make it work. But I think the real question 
is, what should _adReverseChar really do on invalid UTF-8 input?