Noticed that test added by JDK-8328877 is failing with -XX:-CompactStrings:

$ CONF=linux-x86_64-server-fastdebug make images test TEST=runtime/jni/checked/TestLargeUTF8Length.java TEST_VM_OPTS=-XX:-CompactStrings

Exception in thread "main" java.lang.OutOfMemoryError: UTF16 String size is 1073741824, should be less than 1073741823
at java.base/java.lang.StringUTF16.newBytesLength(StringUTF16.java:58)
at java.base/java.lang.StringUTF16.newBytesFor(StringUTF16.java:48)
at java.base/java.lang.StringUTF16.toBytes(StringUTF16.java:167)
at java.base/java.lang.String.<init>(String.java:4848)
at java.base/java.lang.String.<init>(String.java:286)
at TestLargeUTF8Length.test(TestLargeUTF8Length.java:52)
at TestLargeUTF8Length.main(TestLargeUTF8Length.java:58)

It is unclear to me if test even makes sense without compact strings, since it seems to be designed to tickle UTF-8 size boundaries, so we want to create large strings. But it deserves some minor attention, assigning to David.