trie: fix two issues in trie iterator (#24539) #778
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omerfirmak
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* trie: fix memory leak in trie iterator In the trie iterator, live nodes are tracked in a stack while iterating. Popped node states should be explictly set to nil in order to get garbage-collected. * trie: fix empty trie iterator
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Thegaram
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omerfirmak
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cherry-pick fb2ae8e