JSON Parser chokes if there are unicode symbols.

[undisputed-seraphim]

For the lack of a more readily available example, suppose I'm trying to parse the JSON data at the URL https://a.4cdn.org/a/catalog.json.

(inside a void function)
(threads is a std::map<unsigned int, utility::string_t>)

(previous task is response.extract_json(); )

.then([&threads](pplx::task<web::json::value> &value) {
	auto catalog = value.get();

	for (const auto &page : catalog.as_array()) {
		for (const auto &thread : page.at(U("threads")).as_array()) {
			unsigned int thread_no = thread.at(U("no")).as_number().to_uint32();
			threads.emplace(thread_no, thread.at(U("com")).as_string());
		}
	}
}).wait();

This causes the program to die even though it is not outputting any text to the console.
I understand that the reason is because the web site returns text with unicode characters embedded in it, and the JSON parser choked on it.

• If I do response.extract_string() instead (in the previous task), it prints to the console just fine.
• If I try to print value.get().to_string(), it dies on the console as well.
• Merely printing value.type() causes the console to die as well.
  It appears that any action that tries to access the member containing JSON data will cause the program to crash.