Fix CharTrie::CloneFrom #6857
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Fix CharTrie::CloneFrom #6857
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ShortDevelopment
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ppenzin
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CharTrie::CloneFrom uses recursion to clone a CharTrie tree. Currently this can overflow the native stack producing an uncatchable hard crash.
Fix by inserting a PROBE_STACK call that checks sufficient stack space is left and throws a catchable JS exception if not.
Bug reported by @bjrjk
Fix #6835