Roll libxml to bdec2183f34b37ee89ae1d330c6ad2bb4d76605f

third_party/libxml/src/xmlregexp.c

 /*
  * regexp.c: generic and extensible Regular Expression engine
  *
  * Basically designed with the purpose of compiling regexps for
  * the variety of validation/shemas mechanisms now available in
  * XML related specifications these include:
  *    - XML-1.0 DTD validation
  *    - XML Schemas structure part 1
  *    - XML Schemas Datatypes part 2 especially Appendix F
  *    - RELAX-NG/TREX i.e. the counter proposal
@@ skipping 5039 matching lines @@
                 ERROR("Invalid escape value");
                 return;
         }
         len = 1;
     } else if ((cur != 0x5B) && (cur != 0x5D)) {
         end = CUR_SCHAR(ctxt->cur, len);
     } else {
         ERROR("Expecting the end of a char range");
         return;
     }
-    NEXTL(len);
+
     /* TODO check that the values are acceptable character ranges for XML */
     if (end < start) {
         ERROR("End of range is before start of range");
     } else {
+        NEXTL(len);
         xmlRegAtomAddRange(ctxt, ctxt->atom, ctxt->neg,
                            XML_REGEXP_CHARVAL, start, end, NULL);
     }
     return;
 }
 
 /**
  * xmlFAParsePosCharGroup:
  * @ctxt:  a regexp parser context
  *
@@ skipping 3088 matching lines @@
 xmlExpCtxtNbCons(xmlExpCtxtPtr ctxt) {
     if (ctxt == NULL)
         return(-1);
     return(ctxt->nb_cons);
 }
 
 #endif /* LIBXML_EXPR_ENABLED */
 #define bottom_xmlregexp
 #include "elfgcchack.h"
 #endif /* LIBXML_REGEXP_ENABLED */