The following test failed due to an Exception on Linux-X64
in the release config using jdk-12+25 bits:

runtime/jni/checked/TestCheckedEnsureLocalCapacity.java

The test only failed in 1 of 3 'release' bits runs so I'm
tagging this bug as intermittent. It did not fail at all in the
'fastdebug' or 'slowdebug' bits runs.

Here is a snippet from the log file:

----------System.err:(61/4075)*----------
 stdout: [Warning: SIGHUP handler expected:libjvm.so+0xbeabf0 found:0x0000000000000001
Signal Handlers:
SIGSEGV: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGBUS: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGFPE: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGPIPE: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGXFSZ: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGILL: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGUSR2: [libjvm.so+0xbea890], sa_mask[0]=00100000000000000000000000000000, sa_flags=SA_RESTART|SA_SIGINFO
SIGHUP: SIG_IGN, sa_mask[0]=00000000000000000000000000000000, sa_flags=none
SIGINT: [libjvm.so+0xbeabf0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGTERM: [libjvm.so+0xbeabf0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGQUIT: [libjvm.so+0xbeabf0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
ensureCapacity: setting to 60
reduceLocalCapacity: setting to 1
ensureCapacity: creating 45 LocalRefs
ensureCapacity: done
];
 stderr: []
 exitValue = 0

 stdout: [Warning: SIGHUP handler WARNING: JNI local refs: 33, exceeds capacity: 32
expected:libjvm.so+0xbeabf0 at TestCheckedEnsureLocalCapacity.ensureCapacity(Native Method)
        at TestCheckedEnsureLocalCapacity.main(TestCheckedEnsureLocalCapacity.java:57)
  found:0x0000000000000001
Signal Handlers:
SIGSEGV: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGBUS: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGFPE: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGPIPE: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGXFSZ: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGILL: [libjvm.so+0xbea9f0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGUSR2: [libjvm.so+0xbea890], sa_mask[0]=00100000000000000000000000000000, sa_flags=SA_RESTART|SA_SIGINFO
SIGHUP: SIG_IGN, sa_mask[0]=00000000000000000000000000000000, sa_flags=none
SIGINT: [libjvm.so+0xbeabf0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGTERM: [libjvm.so+0xbeabf0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGQUIT: [libjvm.so+0xbeabf0], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
ensureCapacity: setting to 1
reduceLocalCapacity: setting to 1
ensureCapacity: creating 45 LocalRefs
ensureCapacity: done
];
 stderr: []
 exitValue = 0

java.lang.RuntimeException: '^WARNING: JNI local refs: \\d++, exceeds capacity:' missing from stdout

        at jdk.test.lib.process.OutputAnalyzer.stdoutShouldMatch(OutputAnalyzer.java:288)
        at TestCheckedEnsureLocalCapacity.main(TestCheckedEnsureLocalCapacity.java:82)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:567)
        at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
        at java.base/java.lang.Thread.run(Thread.java:835)

JavaTest Message: Test threw exception: java.lang.RuntimeException: '^WARNING: JNI local refs: \\d++, exceeds capacity:' missing from stdout

JavaTest Message: shutting down test

STATUS:Failed.`main' threw exception: java.lang.RuntimeException: '^WARNING: JNI local refs: \\d++, exceeds capacity:' missing from stdout
----------rerun:(29/3778)*----------


The test failed because it could not find this pattern:

    '^WARNING: JNI local refs: \\d++, exceeds capacity:'

The expected output is present:

stdout: [Warning: SIGHUP handler WARNING: JNI local refs: 33, exceeds capacity: 32
expected:libjvm.so+0xbeabf0 at

but the expected line is embedded in the middle of another
output line:

Warning: SIGHUP handler expected:libjvm.so+0xbeabf0

The test needed to be examined to see if the output lines
can be made more distinct. If that's not possible, then the
pattern should be adjusted to not require the expected
output at the beginning of a line.