https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69484
janus at gcc dot gnu.org changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|documentation issue: -Wtabs |[5/6 Regression] |and -Wall |documentation issue: -Wtabs | |and -Wall --- Comment #1 from janus at gcc dot gnu.org --- I guess this issue is related to the change of behaviour regarding -Wtabs from 4.9 to 5. Also, the documentation bug is a regression: The documentation is correct in 4.9, but wrong for versions 5 and 6.