Fix: Error: Callback was already called#540
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BaseMax merged 4 commits intotcort:masterfrom Nov 18, 2025
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In certain odd cases, like a website returning a 302 and/or closing the connection after a HEAD (I'm not 100% sure), linkCheck will call our callback twice. `async` is not amused and will throw: > Error: Callback was already called A campaign of ad-hoc `console.log()`s suggest this is a bug in needle, a library used by link-check. Fixes tcort#222 and tcort#473
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Many thanks. Lets to fully test it to make sure it's ready to be merged. |
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@BaseMax I finally managed to precisely trigger the bug in needle. Seems like it only occurs when a server response to HEAD with a 302 and a body, which is against the HTTP spec. I added a test case of that. I was hoping I could also squeeze in an PTAL! |
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Many thanks again for your tests as well. |
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In certain odd cases, like a website returning a 302 and/or closing the connection after a HEAD (I'm not 100% sure), linkCheck will call our callback twice.
asyncis not amused and will throw:A campaign of ad-hoc
console.log()s suggest this is a bug in needle, a library used by link-check.Fixes #222 and #473