On Thu, 1 May 2014, Chris Johnson wrote:
However, I'm perplexed. The code only uses the libcurl-easy interface, for the most part.
...
So how is it ending up in the libcurl-multi interface?
The easy interface is just an internal wrapper around the multi interface so the curl_easy_perform() will use the multi interface "under the hood". Not that it explains why you get the error, but that may explain how the multi interface got involved in the first place.
Is this condition even a real error? Perhaps my code should just ignore the specific condition associated with the message "easy handled already used in multi handle"?
It is a true error situation. curl_easy_perform() is called and libcurl detects that the easy handle still has a reference to a multi handle, which it shouldn't at any time when curl_easy_perform() is entered.
The question is of course why and how... The only way I see right now how it can happen is if curl_easy_perform() returns early from lib/easy.c:easy_perform as I believe it wrongly leaves data->multi assigned when it fails early in that function, but is that really what happened to you?
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