RFR: 8367368: Add message for verify_legal_class_modifiers for inner classes

[Coleen Phillimore]

On Thu, 11 Sep 2025 00:46:42 GMT, Chen Liang <liach at openjdk.org> wrote:

>> This adds the inner class name (or unnamed) to the error message for invalid inner class modifiers.
>> Testing with tier1-4.
>
> I think for inner class errors, instead of reporting inner simple name, we should report:
> 1. offending class file
> 2. the inner class class constant. It is the only identification part that must be present.
> 3. the offending data, such as bad flags
> 
> What do you think? The inner class constant is universal because outer class is absent for anonymous/local classes and simple name is absent for anonymous classes.

@liach  Most of this information is in the message now, except class file name but we don't usually print that.

$ java Outer
Error: LinkageError occurred while loading main class Outer
	java.lang.ClassFormatError: Illegal class modifiers in inner class Inner of class Outer: 0x63F

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PR Comment: https://git.openjdk.org/jdk/pull/27201#issuecomment-3280379642