[Bug c++/80038] Random segfault using local vectors in Cilk function

[contact@edgar-fournival.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80038

--- Comment #11 from Edgar Fournival <contact@edgar-fournival.fr> ---
It is also interesting to note that GCC 5.x is not impacted.

Even if the given example code will not compile on GCC 5 (ICE in lower_stmt, at
gimple-low.c:397 for the line "cilk_spawn walk(vnew, size);"), we discovered
the bug in this project:
https://github.com/hivert/NumericMonoid/tree/master/src/Cilk%2B%2B (source)
https://github.com/hivert/NumericMonoid/issues/2 (results, unfortunately in
French)
Which does compile under GCC 5.

The quick tests done on my machine show that something between GCC 5.4.0 and
GCC 6.3.1 introduced the destructor bug.