Using Cppcheck 1.80, installed from Ubuntu 17.10 repository.
Cppcheck gives this error when scanning unit_tests/bounding_box_test.cpp:
unit_tests/bounding_box_test.cpp:254: error: No pair for character ('). Can't process file. File is either invalid or unicode, which is currently not supported.
The error occurs on the digit separator on this line. I suspect a bug in Cppcheck, but need to investigate further. In the meantime, scanning this file is disabled.