Package: checkinstall Version: 1.6.2+git20170426.d24a630-3 Followup-For: Bug #964458
Actually the 0014-fix-xstat64.patch already tries to fix this, but applies the fix too late in the function. If it was reworked to move the new code up ~10 lines (to before the "real" mode check), then it would run before the code that's crashing.
