[HttpClient] Fix activity tracking leading to negative timeout errors #59727
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The error case leading to the linked issue is very hard to spot. I won't be able to provide a reproducer nor am I 100% sure that this will fix it. This patch comes solely from logical reasoning so I might have missed something, but hopefully this closes any possibility of passing a negative timeout to
self::select()
.The fix should be provided by the changed lines about
$hasActivity
and$lastActivity
.The rest is cleaning / hardening found meanwhile.