http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55051
--- Comment #24 from Jan Hubicka <hubicka at ucw dot cz> 2012-11-15 10:56:53 UTC --- > Note though that this is not an assert. It just emits a message to > stderr. Do you think a better error message is appropriate? I'm not > sure the "some data files may have been removed" is an accurate > description of the issue. Perhaps something like "Profile data file > mismatch may indicate corrupt profile data"? Well, we should figure out why sum_all starts to diverge. If we had problems mixing cc1 and cc1plus executions, we should get mismatches in number of counters. What happens after the miscompare? Honza