Bug ID: JDK-8332000 BasicDirectoryModel/ConcurrentModification.java fails with Out of Memory

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The javax/swing/plaf/basic/BasicDirectoryModel/ConcurrentModification.java test intermittently fails with java.lang.OutOfMemoryError: Java heap space.

An excerpt from the test log:

----------System.out:(111/13332)----------
[171.099s][warning][gc,alloc] Basic L&F File Loading Thread: Retried waiting for GCLocker too often allocating 1661 words
[175.235s][warning][gc,alloc] Basic L&F File Loading Thread: Retried waiting for GCLocker too often allocating 672 words
[175.235s][warning][gc,alloc] Thread-5: Retried waiting for GCLocker too often allocating 333 words
[175.236s][warning][gc,alloc] Basic L&F File Loading Thread: Retried waiting for GCLocker too often allocating 1536 words
[175.236s][warning][gc,alloc] Basic L&F File Loading Thread: Retried waiting for GCLocker too often allocating 1842 words
[175.236s][warning][gc,alloc] Basic L&F File Loading Thread: Retried waiting for GCLocker too often allocating 2890 words
...

----------System.err:(58/4587)----------
Exception in Basic L&F File Loading Thread: class java.lang.OutOfMemoryError: Java heap space
Exception in Basic L&F File Loading Thread: class java.lang.OutOfMemoryError: Java heap space

Exception: java.lang.IllegalArgumentException thrown from the UncaughtExceptionHandler in thread "Basic L&F File Loading Thread"
Exception in Basic L&F File Loading Thread: class java.lang.OutOfMemoryError: Java heap space
Exception in Basic L&F File Loading Thread: class java.lang.OutOfMemoryError: Java heap space

Exception: java.lang.IllegalArgumentException thrown from the UncaughtExceptionHandler in thread "Basic L&F File Loading Thread"
Exception in Thread-6: class java.lang.InterruptedException


This is happening on macOS x64 only at the moment.

The test is run with the following JVM arguments:
-Xmx768m -XX:MaxRAMPercentage=6.25