This is a serious bug in Clang: it generates incorrect machine code.
The code that Clang generates for the following (gawk/support/dfa.c
lines 1141-1143):
((dfa->syntax.dfaopts & DFA_CONFUSING_BRACKETS_ERROR
? dfaerror : dfawarn)
(_("character class syntax is [[:space:]], not [:
Hi,
I updated the branches stable-202201 and stable-202207 with the bug fixes
from the last three months.
Also, I created a new stable branch stable-202301.
The branch stable-202201 being one year old, it will no longer be updated.
Users of this branch are recommended to switch to stable-202207.
Hi Sam,
Thanks for the further info.
Looking at both bits of dfa.c code, I don't see how either can be
undefined behavior.
In any case, dfa.c is copied directly from GNULIB, so I am cc-ing
bug-gnulib.
Paul & Jim, for background, please see the thread at
https://lists.gnu.org/archive/html/bug-ga
