bug#23808: Emacs 25 open-network-stream, make-network-process

[Lars Ingebrigtsen]

Paul Eggert <eggert@cs.ucla.edu> writes:

> This problem was introduced by the recent async changes (Bug#23808).
> * src/process.c (Fmake_process): Move USE_SAFE_ALLOCA later,
> so that it follows the start_process_unwind unwind-protect.
> Set pid to -1 while the process is being created.
> (start_process_unwind): Omit unnecessary emacs_abort test.
> (connect_network_socket): Simplify use of counts.  Unwind
> bind_polling_period a bit earlier, so that a remove_process
> unwind-protect can be added when needed; this is the heart of
> the fix.  Undo the unwind-protect just before returning.

Seems like the right fix to me, I think?

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