041a66b843
It might happen that a method call handler already generated an error reply and then still propagated the error back to the varlink logic. Let's not try to generate a 2nd reply from that error code then, but simply proceed without. This simplifies handling of errors in method call handlers, because they can uniformly return errno-style error codes, and only if they want return a full Varlink errror.
System and Service Manager
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