I wanted to try the latest Java from the openJdk9 repository with my pretty ancient Eclipse. I downloaded, built and installed it, everything worked fine. Then I set it as the default JVM for Eclipse, everything was recompiled, but with errors, because Java base classes, such as java.lang.CharSequence, were not found.
The build string looks great, and it does rt.jar.

Is there something that blocks Eclipse Indigo from using JDK9? I'm not trying to explore new Java features, I just wanted to measure performance using the latest version.
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