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Typing these four characters could crash your iPhone | TechCrunch
(techcrunch.com)
This is a most excellent place for technology news and articles.
Yeah, since the last character can be anything, it certainly seems JSON-related. If it wasn't, SQL could be on the table ("":: is how you convert types).
Good eye. I find it incredibly odd that JSON would be involved in any way here, but that does seem like a logical idea.