On Wed, 29 Nov 2017, Dawson, Patrick wrote:

> Oops. I am sorry. You are right: I forgot to add this in the example
> project. I added them in my real project though. I still get sporadic
> crashes but now the callstacks are almost always the same and when the crash
> happens it seems to be early in the first 10 http calls. Here is the call
> stack:

Since the CURL_LOCK_DATA_CONNECT support is brand new, it is of course not
unthinkable that there's a bug or two in there to fix. :-/

Feel free to file a bug about it so we don't forget about it:
https://github.com/curl/curl/issues and I'll try to get around and see if I
can reproduce it on my (Linux) machine.

-- 
  / daniel.haxx.se
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