Propagate record duplication error code #820
Merged
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In c-ares 1.30.0 we started validating strings parsed are printable. This caused a regression in a pycares test case due to a wrong response code being returned as the error was being propagated from a different section of code that was assuming the only possible failure condition was out-of-memory.
This PR adds a fix for this and also a test case to validate it.
Ref: saghul/pycares#200
Fix By: Brad House (@bradh352)