[Bug gcov-profile/67097] gcov-tool merge (can) crash when dir2 contains files not in dir1

[gilles.gouaillardet at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67097

--- Comment #3 from Gilles Gouaillardet <gilles.gouaillardet at gmail dot com> 
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Shall I try again with the latest snapshot instead ?
I am not very familiar with building from svn...