Don't check bounds of Java applications in Java units #18054
Merged
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Something goes wrong when we try to do mutually recursive F-bounds checking in Java units. I am not sure what exactly. But in any case, Scala should not try to do Java's typechecking. So we now check applications in Java units only if they refer to Scala classes.
I added a test for #7494, which was originally addressed by #9370, the PR which introduced the Java bounds checking. Adding the test ensures that the new restrictions still flag the original error.
Fixes #17763