The meaning of -Xlint:none,serial

[Archie Cobbs]

What is the intended meaning of a javac flag like -Xlint:none,serial (where
you might replace "serial" with any other non-mandatory lint category).

I always assumed that this means "Disable all lint categories, and then
enable the "serial" category". And in fact, that's how it works for
mandatory lint categories like "unchecked".

But for non-mandatory lint categories, what it actually means is "Disable
all lint categories, period." (which happens here
<https://github.com/openjdk/jdk/blob/56038fb5a156568cce2e80f5db18b10ad61c06e4/src/jdk.compiler/share/classes/com/sun/tools/javac/util/Log.java#L370>
and here
<https://github.com/openjdk/jdk/blob/56038fb5a156568cce2e80f5db18b10ad61c06e4/src/jdk.compiler/share/classes/com/sun/tools/javac/util/Log.java#L722>).


Is that intended? It seems surprising, and is asymmetrical with the meaning
of -Xlint:all,-serial, which means the converse "Enable all lint
categories, and then disable the "serial" category".

Thanks,
-Archie

-- 
Archie L. Cobbs
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