The following langtools javac tests fail when run with the Sequenced Collections (JEP 431) draft implementation:

1. tools/javac/api/TestJavacTaskScanner.java

It looks like this test extracts a bunch of fine-grained information from the `List<String>` type. Since the List interface is modified by this JEP, the test fails.

2. tools/javac/processing/model/type/BoundsTest.java

This test checks proper bounds calculations for the type hierarchy. Since this JEP is modifying the collections type hierarchy -- in particular, SequencedCollection is retrofitted between Collection and List -- it affects the results of the test.

If this can be fixed soon, great. If not, I can problem-list these tests as part of the JEP 431 integration (still a couple weeks away at this writing). Or we can work out an alternative. Please advise.

For an example of the failures, see this GitHub job:

https://github.com/stuart-marks/jdk/actions/runs/3380061747/jobs/5613251565

and search for "TEST RESULT: Failed."