slice valarrays with std::string -> segfault

[Paolo Carlini]

Jhair Tocancipa Triana wrote:

>Please consider the program below (backtrace included (gcc 4.0.2
>(Ubuntu))). The program crashes when doing a std::slice on a valarray
>containing a structure with a string element in it.
>  
>
Just wanted to say that this has nothing to do with string specifically,
happens also together with a completely different implementation of
string or, e.g., together with a deque data member.

I think something is going wrong with types characterized by
""non-trivial"" constructors, e.g., doing memory allocation from the heap.

Gaby can you look into this?

Thanks for your report,
Paolo.