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Index: pcre_exec.c
===================================================================
--- pcre_exec.c (revisione 1512)
+++ pcre_exec.c (revisione 1513)
@@ -1404,8 +1404,11 @@
condition = TRUE;
/* Advance ecode past the assertion to the start of the first branch,
- but adjust it so that the general choosing code below works. */
-
+ but adjust it so that the general choosing code below works. If the
+ assertion has a quantifier that allows zero repeats we must skip over
+ the BRAZERO. This is a lunatic thing to do, but somebody did! */
+
+ if (*ecode == OP_BRAZERO) ecode++;
ecode += GET(ecode, 1);
while (*ecode == OP_ALT) ecode += GET(ecode, 1);
ecode += 1 + LINK_SIZE - PRIV(OP_lengths)[condcode];
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