--- a/mercurial/parsers.c	Thu Jan 23 14:06:15 2014 -0600
+++ b/mercurial/parsers.c	Thu Jan 23 19:08:26 2014 +0100
@@ -185,7 +185,7 @@
 		flen = getbe32(cur + 13);
 		pos += 17;
 		cur += 17;
-		if (flen > len - pos || flen < 0) {
+		if (flen > len - pos) {
 			PyErr_SetString(PyExc_ValueError, "overflow in dirstate");
 			goto quit;
 		}