4 files changed, 16 insertions, 4 deletions
diff --git a/examples/custom_mutators/custom_mutator_helpers.h b/examples/custom_mutators/custom_mutator_helpers.h
index ad5acb08..62e6efba 100644
--- a/examples/custom_mutators/custom_mutator_helpers.h
+++ b/examples/custom_mutators/custom_mutator_helpers.h
@@ -13,7 +13,7 @@
 #define BUF_VAR(type, name) \
   type * name##_buf;        \
   size_t name##_size;
-/* this filles in `&structptr->something_buf, &structptr->something_size`. */
+/* this fills in `&structptr->something_buf, &structptr->something_size`. */
 #define BUF_PARAMS(struct, name) \
   (void **)&struct->name##_buf, &struct->name##_size
 
diff --git a/examples/custom_mutators/post_library_gif.so.c b/examples/custom_mutators/post_library_gif.so.c
index 2d72400c..ac10f409 100644
--- a/examples/custom_mutators/post_library_gif.so.c
+++ b/examples/custom_mutators/post_library_gif.so.c
@@ -94,7 +94,13 @@ void *afl_custom_init(void *afl) {
   }
 
   state->buf = calloc(sizeof(unsigned char), 4096);
-  if (!state->buf) { return NULL; }
+  if (!state->buf) {
+
+    free(state);
+    perror("calloc");
+    return NULL;
+
+  }
 
   return state;
 
diff --git a/examples/custom_mutators/post_library_png.so.c b/examples/custom_mutators/post_library_png.so.c
index 7c1ea93e..941f7e55 100644
--- a/examples/custom_mutators/post_library_png.so.c
+++ b/examples/custom_mutators/post_library_png.so.c
@@ -54,7 +54,13 @@ void *afl_custom_init(void *afl) {
   }
 
   state->buf = calloc(sizeof(unsigned char), 4096);
-  if (!state->buf) { return NULL; }
+  if (!state->buf) {
+
+    free(state);
+    perror("calloc");
+    return NULL;
+
+  }
 
   return state;
 
diff --git a/examples/custom_mutators/simple_example.c b/examples/custom_mutators/simple_example.c
index a351d787..d888ec1f 100644
--- a/examples/custom_mutators/simple_example.c
+++ b/examples/custom_mutators/simple_example.c
@@ -8,7 +8,7 @@
 #include <stdio.h>
 
 #ifndef _FIXED_CHAR
-  #define 0x41
+  #define _FIXED_CHAR 0x41
 #endif
 
 typedef struct my_mutator {