diff options
Diffstat (limited to 'pcre_compile.c')
| -rw-r--r-- | pcre_compile.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/pcre_compile.c b/pcre_compile.c index 92b9f30..c592a49 100644 --- a/pcre_compile.c +++ b/pcre_compile.c @@ -4625,6 +4625,14 @@ while ((c = *(++ptr)) != 0) nothing is done here and it is handled during the compiling process. + We allow for more than one options setting at the start. If such + settings do not change the existing options, nothing is compiled. + However, we must leave space just in case something is compiled. + This can happen for pathological sequences such as (?i)(?-i) + because the global options will end up with -i set. The space is + small and not significant. (Before I did this there was a reported + bug with (?i)(?-i) in a machine-generated pattern.) + [Historical note: Up to Perl 5.8, options settings at top level were always global settings, wherever they appeared in the pattern. That is, they were equivalent to an external setting. From 5.8 @@ -4637,6 +4645,7 @@ while ((c = *(++ptr)) != 0) options = (options | set) & (~unset); set = unset = 0; /* To save length */ item_count--; /* To allow for several */ + length += 2; } /* Fall through */ |