Pass test if one parser says overflow and the other says reject

Maybe in the future we could rerun with a bigger stack?

src/fuzz.cpp

@@ -25,11 +25,8 @@ std::pair<std::string, WeaselJsonStatus> runStreaming(std::string copy,
     }
   }
   auto s = parser.parse(nullptr, 0);
-  if (s != WeaselJson_OK) {
   return {state.result, s};
 }
-  return {state.result, WeaselJson_OK};
-}
 
 std::pair<std::string, WeaselJsonStatus> runBatch(std::string copy) {
   SerializeState state;
@@ -40,27 +37,31 @@ std::pair<std::string, WeaselJsonStatus> runBatch(std::string copy) {
     return {state.result, s};
   }
   s = parser.parse(nullptr, 0);
-  if (s != WeaselJson_OK) {
   return {state.result, s};
 }
-  return {state.result, WeaselJson_OK};
-}
 
 void testStreaming(std::string const &json) {
   auto batch = runBatch(json);
+  if (batch.second == WeaselJson_AGAIN) {
+    abort();
+  }
   for (int stride = 1; stride < 16; ++stride) {
     auto streaming = runStreaming(json, stride);
     if (streaming != batch) {
-      if (streaming.second == batch.second &&
-          streaming.second != WeaselJson_OK) {
+      if (streaming.second == WeaselJson_AGAIN) {
+        abort();
+      }
+      bool streamingOk = streaming.second == WeaselJson_OK;
+      bool batchOk = batch.second == WeaselJson_OK;
+      if (streamingOk == batchOk && !batchOk) {
         // It's ok if the processed data doesn't match if parsing failed
-        return;
+        continue;
       }
       printf("streaming: %s, %s\n",
              streaming.second == WeaselJson_OK ? "accept" : "reject",
              streaming.first.c_str());
       printf("batch: %s, %s\n",
-             streaming.second == WeaselJson_OK ? "accept" : "reject",
+             batch.second == WeaselJson_OK ? "accept" : "reject",
              batch.first.c_str());
       abort();
     }