[Bug gcov-profile/64123] [5 Regression] Instrumented Firefox segfaults on start

[nathan at acm dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64123

--- Comment #22 from Nathan Sidwell <nathan at acm dot org> ---
thanks Honza, that was helpful. I'm an idiot.  Your workaround unhiding
gcov_var is fine for now, while I figure out if there's a better way.  I am
puzzled as to why I can't observe this failure in the testcase I've
constructed.