1 files changed, 5 insertions, 0 deletions
diff --git a/regcomp.c b/regcomp.c
index f60438370d..922e65b086 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -4875,6 +4875,11 @@ onig_alloc_init(regex_t** reg, OnigOptionType option, OnigAmbigType ambig_flag,
   if (ONIGENC_IS_UNDEF(enc))
     return ONIGERR_DEFAULT_ENCODING_IS_NOT_SETTED;
 
+  if ((option & (ONIG_OPTION_DONT_CAPTURE_GROUP|ONIG_OPTION_CAPTURE_GROUP))
+      == (ONIG_OPTION_DONT_CAPTURE_GROUP|ONIG_OPTION_CAPTURE_GROUP)) {
+    return ONIGERR_INVALID_COMBINATION_OF_OPTIONS;
+  }
+
   *reg = (regex_t* )xmalloc(sizeof(regex_t));
   if (IS_NULL(*reg)) return ONIGERR_MEMORY;
   (*reg)->state = ONIG_STATE_MODIFY;