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Lift minimum Swift version to 6.2 - #935
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simonjbeaumont
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Oct 7, 2026
Co-authored-by: Si Beaumont <simonjbeaumont@gmail.com>
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* Fix crash in debug when request body stream finishes after a >= 300 response head (swift-server#934) ### Motivation If a server responds with a status >= 300 while we are still uploading the request body, we ask the producer to pause the request body stream. The producer may still finish the stream, because it raced with the pause request. In this case we hit `assert(head.status.code < 300)` in `HTTPRequestStateMachine.requestStreamFinished`, which crashes debug builds. ### Changes - Remove the wrong assertion. Finishing the request body stream after a >= 300 response head is a valid state transition: we send the request `.end` and move into `.endSent`. - Add a reproducer in `HTTPRequestStateMachineTests` that streams a body part, receives a 413 Payload Too Large head and then finishes the request body stream. ### Result A request body stream that finishes after the server responded with a `status >= 300` no longer crashes in debug. Since the request `.end` is on the wire, the connection can be reused after the response ends. --------- Co-authored-by: Eric Rosenberg <eric_rosenberg@apple.com> * Lift minimum Swift version to 6.2 (swift-server#935) Co-authored-by: Si Beaumont <simonjbeaumont@gmail.com> --------- Co-authored-by: Fabian Fett <fabianfett@apple.com> Co-authored-by: Eric Rosenberg <eric_rosenberg@apple.com> Co-authored-by: Si Beaumont <simonjbeaumont@gmail.com> Co-authored-by: brennobemoura <37243584+brennobemoura@users.noreply.github.com> Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
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