NativePty.close() now awaits the reader-isolate spawn, kills the
child first to drive EOF on the master fd, awaits the isolate's
EOF acknowledgement, and only then closes the fd. Previously the
fd-close racing with the polling isolate left a window where the
fd number could be reused and the isolate would briefly target the
wrong file.
Both NativePty and PtySession now surface reader-isolate spawn
errors via the output stream's addError instead of silently
swallowing them.
PtySession.spawn closes the master fd on any post-receive failure,
closes parentSock in finally (was leaking on every spawn), and
kills the ptyc process if recvFd fails.
PtySession._recvFdAsync uses try/finally to close the ReceivePort
and kill the spawn isolate even when Isolate.spawn itself throws.
Co-Authored-By: Claude <noreply@anthropic.com>
jpmschweitzerandClaude
1787147e82