[Bug gcov-profile/82614] GCOV crashes while parsing gcda file

[mcastelluccio at mozilla dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82614

--- Comment #3 from Marco Castelluccio <mcastelluccio at mozilla dot com> ---
> Thanks for the report Marco. Looks it comes from Firefox, am I right?

Yes, that's correct. Actually, from a build of the JS shell.

> Which version of GCC have you been using?

The build was done with "gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609".

We were also able to reproduce the crash with a gcda generated normally,
without __gcov_dump.