kc3-lang/gnulib

2020-09-13T18:40:08

dfa: avoid use of uninitialized constraint * lib/dfa.c (merge_nfa_state): Do not initialize the constraint to zero here. (dfaoptimize): Do it here instead, via xcalloc. This prevents the use of an uninitialized constraint by later code when ! (flags[i] & OPT_QUEUED) means merge_nfa_state was not called to initialize the constraint. Problem found by running 'valgrind src/grep -E '(^| )*(a|b)*(c|d)*( |$)' < /dev/null' on Ubuntu 18.04.5 x86-64.