diff -r b37dd26935ee -r 741fb1a95da2 contrib/fuzz/jsonescapeu8fast.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contrib/fuzz/jsonescapeu8fast.cc	Wed Oct 09 20:49:58 2019 -0700
@@ -0,0 +1,57 @@
+#include <Python.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "pyutil.h"
+
+#include <fuzzer/FuzzedDataProvider.h>
+#include <iostream>
+#include <string>
+
+extern "C" {
+
+static PyCodeObject *code;
+
+extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+	contrib::initpy(*argv[0]);
+	code = (PyCodeObject *)Py_CompileString(R"py(
+from parsers import jsonescapeu8fast
+
+try:
+    jsonescapeu8fast(data, paranoid)
+except Exception as e:
+    pass
+    # uncomment this print if you're editing this Python code
+    # to debug failures.
+    # print(e)
+)py",
+	                                        "fuzzer", Py_file_input);
+	if (!code) {
+		std::cerr << "failed to compile Python code!" << std::endl;
+	}
+	return 0;
+}
+
+int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
+{
+	FuzzedDataProvider provider(Data, Size);
+	bool paranoid = provider.ConsumeBool();
+	std::string remainder = provider.ConsumeRemainingBytesAsString();
+
+	PyObject *mtext = PyBytes_FromStringAndSize(
+	    (const char *)remainder.c_str(), remainder.size());
+	PyObject *locals = PyDict_New();
+	PyDict_SetItemString(locals, "data", mtext);
+	PyDict_SetItemString(locals, "paranoid", paranoid ? Py_True : Py_False);
+	PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals);
+	if (!res) {
+		PyErr_Print();
+	}
+	Py_XDECREF(res);
+	Py_DECREF(locals);
+	Py_DECREF(mtext);
+	return 0; // Non-zero return values are reserved for future use.
+}
+}