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-rw-r--r--include/afl-fuzz.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/afl-fuzz.h b/include/afl-fuzz.h
index 972d2a60..acded98f 100644
--- a/include/afl-fuzz.h
+++ b/include/afl-fuzz.h
@@ -1165,5 +1165,9 @@ u8 *queue_testcase_get(afl_state_t *afl, struct queue_entry *q);
 void queue_testcase_retake(afl_state_t *afl, struct queue_entry *q,
                            u32 old_len);
 
+#if TESTCASE_CACHE == 1
+  #error define of TESTCASE_CACHE must be zero or larger than 1
+#endif
+
 #endif