Add better handling for unbalanced HTML tags#2924
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ehuss merged 6 commits intorust-lang:masterfrom Nov 6, 2025
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This checks for any unclosed elements when processing is finished. This is intended to detect invalid HTML in the source, or bugs in the tree builder. Raw HTML elements generate a warning (which in the future will be a configurable lint). All other sync errors are internal errors as they are not expected, and it would be helpful to know if they ever happen.
This changes the internal error message to a warning to let the user know that the HTML tags are unbalanced. In the future this will be a denyable lint. This is a very primitive approach of just ignoring the end tag. Ideally it should recover using the standard HTML parsing algorithm, since there is a chance that there will be a cascade of errors under certain unbalanced situations.
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This adds a little bit better handling when HTML tags are unbalanced or unclosed. It does not implement the HTML standard recovery algorithm, but I think this should be fine. The author mostly just needs to know that there is something wrong.