https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84548
--- Comment #18 from Martin Liška <marxin at gcc dot gnu.org> --- (In reply to Dmitry G. Dyachenko from comment #17) > No ICE! > Thank Martin! Good. Can you please attach gcov file for the problematic invocation of gcov tool? > > And once more strangeness > > I have (at least) 2 messages 'YYY.gcda:stamp mismatch with notes file' > from 3K gcno-files in full project. > > $ ~/build/gcc_current/prev-gcc/gcov cpcapi20suite.gcno > cpcapi20suite.gcda:stamp mismatch with notes file > File > '/home/dimhen/src/CSPbuild/CSP/unittest/CpCapi20UnitTest/cpcapi20suite.cpp' > No executable lines > Removing 'cpcapi20suite.cpp.gcov' > > File > '/usr/local/cppunit-1.13.2/8/debug/include/cppunit/extensions/ > AutoRegisterSuite.h' > Lines executed:0.00% of 14 > Creating 'AutoRegisterSuite.h.gcov' > > [...] > > File '/usr/local/gcc_current/include/c++/8.0.1/new' > Lines executed:0.00% of 3 > Creating 'new.gcov' > > File > '/home/dimhen/src/CSPbuild/CSP/unittest/CpCapi20UnitTest/cpcapi20suite.h' > Lines executed:0.00% of 2 > Creating 'cpcapi20suite.h.gcov' It can be caused by 2 files 'cpcapi20suite.cpp' in the project. Is it possible that you have multiple files in a different folders?