patch 9.0.1271: using sizeof() and subtract array size is tricky
Problem: Using sizeof() and subtract array size is tricky.
Solution: Use offsetof() instead. (closes #11926)
diff --git a/src/regexp_nfa.c b/src/regexp_nfa.c
index 92475ad..cc29a4c 100644
--- a/src/regexp_nfa.c
+++ b/src/regexp_nfa.c
@@ -7505,7 +7505,7 @@
post2nfa(postfix, post_ptr, TRUE);
// allocate the regprog with space for the compiled regexp
- prog_size = sizeof(nfa_regprog_T) + sizeof(nfa_state_T) * (nstate - 1);
+ prog_size = offsetof(nfa_regprog_T, state) + sizeof(nfa_state_T) * nstate;
prog = alloc(prog_size);
if (prog == NULL)
goto fail;