The concept of synthetic errnos is about logging, which is irrelevant irt bus error and we don't do any special treatment in sd-bus for them, meaning the value propagated would be spurious. (cherry picked from commit 2f2058da0b88535cb3a95fc98e7b2f1ae4d35601) (cherry picked from commit 018c7fb18ae8aff5414d5e74cb41fb98b72c0554)
System and Service Manager
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