Comment 1 for bug 1595148

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Colin Watson (cjwatson) wrote : Re: 0 is returned on failure

I don't think this is a bug. The principle I'm following here is that you asked update-binfmts to put your system into a certain state (respectively, "no binary format EXE should be installed" and "the binary format EXE should be installed with this specification"), and your system was already in that state, so it had nothing to do. Emitting a warning is reasonable in case this indicates a bug in something higher-level, but it is not a failure and a non-zero exit code would be inappropriate.

Could you explain why the zero exit code causes a problem for you?