[Bug c/66373] gcc downloaded from Fedora 21 repository produces defective executable. Same source code with gcc from Fedora 19 and Fedora 20 works fine

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66373

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
You should try valgrind on the program, compile/link with
-fsanitize=address,undefined and see what it reports during runtime, try
different compiler options.
If you then still suspect a compiler bug, please try to turn your program into
a self-contained reproducer, see http://gcc.gnu.org/bugs/ for details.