[Bug c++/80038] Random segfault using local vectors in Cilk function [Regression 6/7]

[ryxi at stu dot xidian.edu.cn]

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

--- Comment #27 from Xi Ruoyao <ryxi at stu dot xidian.edu.cn> ---
Created attachment 41027
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41027&action=edit
patch proposal

Now I've prepared a patch.  It reverted r227423 (but preserved its testcase)
and used a more conforming way to resolve pr60586.

It seems this patch fixed Florent's testcase, and NumericMonoid code as well.

I'll run a complete dejaGNU regression test.  If it's OK I'll submit the patch.