Index: kernel/generic/src/lib/str.c
===================================================================
--- kernel/generic/src/lib/str.c	(revision f97f1e51a29f20f8f26f381c9c84567e9a997538)
+++ kernel/generic/src/lib/str.c	(revision 181a746c0eb2d625af267727d01796f91915bccd)
@@ -554,4 +554,5 @@
 	/* There must be space for a null terminator in the buffer. */
 	ASSERT(size > 0);
+	ASSERT(src != NULL);
 	
 	size_t src_off = 0;