Hello! htmlCheckEncoding has missing input->end update, so when buffer is relocated it could parse html data twice. A program that reproduces that case is attached.
It's weird it copies memory buffer though. Maybe we should mark buffer that are not supposed to shrink/grow with a flag?
Fix-double-parsing-when-buffer-changes-its-base-in-htmlCheckEncoding.patch
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double_parsing_repro.c
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