Running JNICheck.sh results in below warning in java.c and net_util.c and signal handler code resulting in failure. Please look at the log.txt in JTwork/closed/java/awt/font/JNICheck.sh

WARNING in native method: JNI call made without checking exceptions when required to from CallStaticObjectMethod
WARNING in native method: JNI call made without checking exceptions when required to from CallStaticBooleanMethod
along with

Warning: SIGPIPE handler expected:libjvm.so+0x780650 found:0x00000001
Signal Handlers:
SIGSEGV: [libjvm.so+0x780650], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGBUS: [libjvm.so+0x780650], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGFPE: [libjvm.so+0x780650], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO
SIGPIPE: SIG_IGN, sa_mask[0]=00000000000010000000000000000000, sa_flags=SA_RESTART
SIGXFSZ: [libjvm.so+0x780650], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO