curl_easy_duphandle() bug after 7.69.1 #5097
I try it on 7.69.1 and 7.69.2-dev, same problem. 7.69.0 working well.
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jay added a commit to jay/curl that referenced this issue
Mar 14, 2020
- Ignore CURLE_NOT_BUILT_IN errors returned by c-ares functions in curl_easy_duphandle. Prior to this change if c-ares was used as the resolver backend and either it was too old or libcurl was built without IPv6 support then some of our resolver functions could return CURLE_NOT_BUILT_IN to curl_easy_duphandle causing it to fail. Caused by c8f086b which shipped in 7.69.1. Reported-by: Karl Chen Fixes curl#5097 Closes #xxxx