On Tue, 14 Jan 2025, Aleksander Mazur via curl-library wrote:
The problem is that although everything seems to work (in version 8.9.1), valgrind reports massive memory leaks each time the easy handle is re-used by curl_easy_perform. On the other hand, if interrupted right after first successful connection, memleak report is clear.
As documented in the CURLOPT_CONNECT_ONLY man page which seems relevant since your example code uses it:
Transfers marked connect only do not reuse any existing connections and connections marked connect only are not allowed to get reused.
Second time libcurl aborts with: example: url.c:749: Curl_conn_seems_dead: Assertion `!data->conn' failed.
That should probably be handled better, but you seem to be using a debug build and then we sometimes make it do things with asserts like that.
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