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diff --git a/libmudflap/testsuite/libmudflap.c/pass46-frag.c b/libmudflap/testsuite/libmudflap.c/pass46-frag.c
new file mode 100644
index 00000000..2f327891
--- /dev/null
+++ b/libmudflap/testsuite/libmudflap.c/pass46-frag.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int foo (int *u, int i)
+{
+   return u[i];  /* this dereference should not be instrumented */
+}
+
+int main ()
+{
+  int *k = malloc (6);
+ int l = foo (k, 8);
+ int boo [8];
+ int m = boo [l % 2 + 12]; /* should not be instrumented */
+ return m & strlen (""); /* a fancy way of saying "0" */
+}
+/* { dg-options "-fmudflap -fmudflapir -lmudflap -Wall" } */