Fixes #1122 where json_spirit could stack overflow because there

was no maximum limit set on the number of nested compound elements.

src/gtest/test_jsonspirit.cpp

@@ -0,0 +1,17 @@
+#include <gtest/gtest.h>
+
+#include "json/json_spirit_reader_template.h"
+
+using namespace json_spirit;
+
+// This test checks if we have fixed a stack overflow problem with json_spirit.
+// It was possible to try and create an unlimited number of nested compound elements.
+// Without the fix in json_spirit_reader_template.h, this test will segfault.
+TEST(json_spirit_tests, nested_input_segfault) {
+    std::vector<char> v (100000);
+    std::fill (v.begin(),v.end(), '[');
+    std::string s(v.begin(), v.end());
+    Value value;
+    bool b = json_spirit::read_string(s, value);
+    ASSERT_FALSE(b);
+}