TCrossServer - only adopt AListen.LocalPort when the listen succeeded#184
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winddriver merged 1 commit intoJun 25, 2026
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The Listen callback updated FPort with AListen.LocalPort whenever FPort was 0 -- even when the listen attempt failed -- so FPort was silently overwritten with the LocalPort of a failed/garbage listener. The line just above already gates AtomicExchange(FStarted, 1) on ASuccess, and the comment immediately above the FPort line says "extract the actual port AFTER LISTEN SUCCEEDS" -- the code just missed the ASuccess check on this branch.
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The Listen callback updated FPort with AListen.LocalPort whenever FPort was 0 -- even when the listen attempt failed -- so FPort was silently overwritten with the LocalPort of a failed/garbage listener.
The line just above already gates AtomicExchange(FStarted, 1) on ASuccess, and the comment immediately above the FPort line says "extract the actual port AFTER LISTEN SUCCEEDS" -- the code just missed the ASuccess check on this branch.