I posted about adding pthread_cancel use in curl about three weeks ago, we released this in curl 8.16.0 and it blew up right in our faces. Now, with #18540 we are ripping it out again. What happened? short recap pthreads define “Cancelation points”, a list of POSIX functions where a pthread may be cancelled. In addition, there is also a list of functions that may be cancelation points, among those getaddrinfo(). getaddrinfo() is exactly what we are interested in for libcurl. It blocks unt...