The following is an *untested* patch suggestion, please verify. Notes: My interpretation is that hash<error_condition> should be defined outside of the _GLIBCXX_COMPATIBILITY_CXX0X block, please double-check that course of action.
I noticed that the preexisting hash<error_code> did directly refer to the private members of error_code albeit those have public access functions. For consistency I mimicked that existing style when implementing hash<error_condition>. - Daniel
lwg2686.patch
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ChangeLog_lwg2686.patch
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