fix: detect redirect loops during HTML build#3104
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Validate `[output.html.redirect]` for cycles before emitting redirect pages, so misconfigured loops fail at build time instead of reloading in the browser indefinitely. Fixes rust-lang#2901. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Fixes #2901.
Detects cycles in
[output.html.redirect]at build time and fails with a clear error, instead of letting the browser reload redirect pages indefinitely.Changes
/page.html#frag)Test plan
cargo test -p mdbook-html redirect_loopcargo test redirect_loop(testsuite)Made with Cursor