The following two test classes contained the same test class:

  tapeserver/castor/tape/tapeserver/daemon/MigrationReportPackerTest.cpp
  tapeserver/castor/tape/tapeserver/daemon/RecallReportPackerTest.cpp

They both defined and declared the class castor_tape_tapeserver_daemonTest.

When I added a member to one of the duplicate classes I got memory
corruption that valgrind detected but gave difficult to understand
error messages.