--- chktex-1.6.4/FindErrs.c	
+++ chktex-1.6.4/FindErrs.c	
@@ -187,0 +187,9 @@ 
+static void ShiftLeftOne(char *Buf)
+{
+    char *P;
+
+    for (P = Buf + 1; *P; ++P)
+      *(P - 1) = *P;
+    *(P - 1) = '\0';
+}
+
@@ -221,1 +230,10 @@ 
-            strcpy(OrigDest, OrigDest + 1);
---
+	    /* According to strcpy(3): The strings may not overlap
+	       So the following call:
+
+	          strcpy(OrigDest, OrigDest + 1);
+
+	       is undefined, and it DOES produce errors in new versions
+	       of glibc (checked on glibc-2.12.2).
+
+	       Call safe version. */
+   	    ShiftLeftOne(OrigDest);