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When pipelined requests arrive in one TCP segment, llhttp_execute() parses them all in a single call. If a synchronous 'close' event handler invokes freeParser() mid-execution, cleanParser() nulls out parser state while llhttp_execute() is still on the stack, crashing on the next callback. Add an is_being_freed_ flag that freeParser() sets via parser.markFreed() before cleaning state. Proxy::Raw checks the flag before every callback and returns HPE_USER to abort execution early if set. PR-URL: #62095 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
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