bug#40665: 28.0.50; tls hang on local ssl

[Robert Pluim]

>>>>> On Tue, 21 Apr 2020 14:45:34 +0000 (UTC), Derek Zhou <derek@3qin.us> said:

    >> With emacs-26 or emacs-27? The GnuTLS code between the two is quite
    >> different, mainly things like:
    >> 
    >> commit e87e6a24c49542111e669b7d0f1a412024663f8e
    >> Author: Paul Eggert <eggert@cs.ucla.edu>
    >> Date:   Tue Jan 15 23:51:45 2019 -0800
    >> 
    >> Fix unlikely races with GnuTLS, datagrams
    >> 
    >> which despite the comment are perhaps not that unlikely.

    Derek> With emacs-26. maybe I should just use emacs-27 from now on.
    Derek> emacs-27 don't have this indefinite stall, however, it still stalls 
for
    Derek> a few seconds. The network is not that slow; it feels like something
    Derek> wasn't happening in time and was only being triggered later by some
    Derek> fallback mechanism.

Thatʼs always possible. You'd have to stick some instrumentation in
things like connect_network_socket and wait_reading_process_output to
narrow it down.

Robert