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eclipse-openj9 / openj9

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Improve error message when loading an invalid class version

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Thihup
Thihup commented Aug 19, 2021

Current, if we try to run a more recent Java class in an old JVM, we get the following error message:

Error: LinkageError occurred while loading main class some.Class
	java.lang.UnsupportedClassVersionError: JVMCFRE003 bad major version; class=some/Class, offset=6

However, it is not so easily to detect that the class was compiled with a version above the supported by the JVM.Hotspot

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good first issue comp:vm userRaised
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