Added new concept check,

removed assertion in degug allocator that was being triggered by std lib code !


[SVN r18873]

libs/regex

@@ -1 +1 @@
-Subproject commit 4a06f15183c953d5dccab42a26565e7d4f569ac7
+Subproject commit 6f9ba7a2899e6662a66c2eca4abd5dc99a1c0577