Temporary disable i23245a

[mbovel]

i23245a seems flaky, see #23788 (comment). I suggest we disable it temporary to avoid CI failures, until we investigate further.

[odersky]

I had it also failing on my recent PRs.

[som-snytt]

If the test fails, it seems to me more likely that the fix needs to be reverted.

Edit: maybe it's not flaky.

https://github.com/scala/scala3/actions/runs/19710004246/job/56472246137

Test 'tests/run/i23245a' failed with output:                                    

Exception: java.lang.NullPointerException thrown from the UncaughtExceptionHandler in thread "main"

Error:  Test dotty.tools.dotc.CompilationTests.runAll failed: java.lang.AssertionError: Run test failed, but should not, reasons:
Error:  encountered 1 test failure(s):
Error:    - generic failure (see test output), took 196.516 sec
Error:      at dotty.tools.vulpix.ParallelTesting$CompilationTest.checkPass(ParallelTesting.scala:1271)
Error:      at dotty.tools.vulpix.ParallelTesting$CompilationTest.checkRuns(ParallelTesting.scala:1235)
Error:      at dotty.tools.dotc.CompilationTests.runAll(CompilationTests.scala:179)
Error:      at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
Error:      at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
Error:      at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Error:      at java.lang.reflect.Method.invoke(Method.java:569)
Error:      ...

[odersky]

I agree, we should go back to the original issue and find out how we can tweak the fix. @som-snytt can you take a look at this?

[som-snytt]

@odersky yes, I will follow up. I was busy today breaking other things.