macros <- readIORef macros_ref
let{ (str, cmds) = case str' of
':' : rest -> (rest, builtin_commands)
- _ -> (str', macros ++ builtin_commands) }
+ _ -> (str', builtin_commands ++ macros) }
-- look for exact match first, then the first prefix match
+ -- We consider builtin commands first: since new macros are appended
+ -- on the *end* of the macros list, this is consistent with the view
+ -- that things defined earlier should take precedence. See also #3858
return $ case [ c | c <- cmds, str == cmdName c ] of
c:_ -> Just c
[] -> case [ c | c@(s,_,_) <- cmds, str `isPrefixOf` s ] of