RFR: 8340205: Native linker allows MemoryLayout consisting of only PaddingLayout [v5]

[Maurizio Cimadamore]

On Mon, 30 Sep 2024 14:34:49 GMT, Vladimir Kozelkov <duke at openjdk.org> wrote:

> > I don't think anything else is needed here.
> 
> Besides the fact that it shouldn't run, but it does (all 4 examples run without any exception!)

I meant - no other layout is needed - as we don't have any "alignment gap" here - the union size is already a multiple of its alignment. So, this seems another case where there's "redundant" padding that is not detected.

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PR Comment: https://git.openjdk.org/jdk/pull/21041#issuecomment-2383605851