Take the sample program from 4649647. Try running on a machine
like mine:

    uname: SunOS analemma 5.7 Generic_106541-21 sun4u sparc SUNW,Ultra-60
    memory: Memory size: 512 Megabytes
    cpu: 2 at 450 MHz

using either JDK-1.4.0, JDK-1.4.1, or JDK-1.4.2, and get

    % $Deployed/JDK-1.4.1/bin/java -showversion JFrameBug
    java version "1.4.1-rc"
    Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-rc-b19)
    Java HotSpot(TM) Client VM (build 1.4.1-rc-b19, mixed mode)


    An unexpected exception has been detected in native code outside the VM.
    Unexpected Signal : 10 occurred at PC=0xF1892A24
    Function=XFindContext+0x13C
    Library=/usr/openwin/lib/libX11.so.4

    Current Java thread:
at sun.awt.motif.MToolkit.run(Native Method)
at java.lang.Thread.run(Thread.java:536)

    Dynamic libraries:
    0x10000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/bin/java
    0xff350000 /usr/lib/libthread.so.1
    0xff390000 /usr/lib/libdl.so.1
    0xff200000 /usr/lib/libc.so.1
    0xff330000 /usr/platform/SUNW,Ultra-60/lib/libc_psr.so.1
    0xfe000000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/client/libjvm.so
    0xff2d0000 /usr/lib/libCrun.so.1
    0xff1e0000 /usr/lib/libsocket.so.1
    0xff100000 /usr/lib/libnsl.so.1
    0xff0d0000 /usr/lib/libm.so.1
    0xff310000 /usr/lib/libw.so.1
    0xff0b0000 /usr/lib/libmp.so.2
    0xff080000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/native_threads/libhpi.so
    0xff050000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/libverify.so
    0xfe7c0000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/libjava.so
    0xff030000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/libzip.so
    0xf1c00000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/libawt.so
    0xfe450000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/libmlib_image.so
    0xfdf90000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/motif21/libmawt.so
    0xf1980000 /usr/dt/lib/libXm.so.4
    0xfc490000 /usr/openwin/lib/libXt.so.4
    0xfc7d0000 /usr/openwin/lib/libXext.so.0
    0xfdee0000 /usr/openwin/lib/libXtst.so.1
    0xf1880000 /usr/openwin/lib/libX11.so.4
    0xfc430000 /usr/openwin/lib/libdps.so.5
    0xfa3e0000 /usr/openwin/lib/libSM.so.6
    0xfa3b0000 /usr/openwin/lib/libICE.so.6
    0xf1780000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/libfontmanager.so
    0xfa2e0000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/libsunwjdga.so
    0xfa2b0000 /usr/openwin/lib/libdga.so.1
    0xfa190000 /net/analemma.SFBay/export/home/analemma/pbk/deployed/JDK-1.4.1/jre/lib/sparc/libjdgaSUNWffb.so

    Local Time = Thu Aug 15 16:17:33 2002
    Elapsed Time = 10
    #
    # The exception above was detected in native code outside the VM
    #
    # Java VM: Java HotSpot(TM) Client VM (1.4.1-rc-b19 mixed mode)
    #
    # An error report file has been saved as hs_err_pid28714.log.
    # Please refer to the file for further information.
    #
    Abort (core dumped)

I don't think this is related to the "running out of memory" issue raised
in 4649647, since rerunning with a fixed large heap and GC tracing flags
shows:

    analemma ... $Deployed/JDK-1.4.1/bin/java -showversion -Xmx64m -Xms64m -XX:+PrintGC -XX:+PrintGCTimeStamps JFrameBug
    java version "1.4.1-rc"
    Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.1-rc-b19)
    Java HotSpot(TM) Client VM (build 1.4.1-rc-b19, mixed mode)
    
    7.14e-07: [GC 6847K->4058K(65344K), 0.1450699 secs]
    10.0372: [GC 10906K->8632K(65344K), 0.1917474 secs]
    
    An unexpected exception has been detected in native code outside the VM.
    Unexpected Signal : 11 occurred at PC=0xF18929BC
    Function=XFindContext+0xD4
    Library=/usr/openwin/lib/libX11.so.4
    
    Current Java thread:
     at sun.awt.motif.MToolkit.run(Native Method)
      at java.lang.Thread.run(Thread.java:536)
    ...
    Elapsed Time = 26
    ...

so the last collection was at 10 seconds into the run and left us with
52MB of free space. I guess maybe we were about to do another collection,
though running it again has it crashing at 18 seconds, and the program
seems like it should be fairly consistent in its memory demands.