CTest with CTEST_EXTRA_COVERAGE_GLOB fails for files in build dir if that is below source dir
The reason is because https://gitlab.kitware.com/cmake/cmake/blob/master/Source/CTest/cmCTestCoverageHandler.cxx#L550 assumes the file is relative to the source directory.
I have pushed a branch that shows the error in a new testcase: https://gitlab.kitware.com/DerDakon/cmake/commits/CTest-Glob-missing