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[another_sam <fuljencio@xxxxxxxxx>]

I also have frequent crashes with NetBeans. In several, at first glance
random, moments. I just found a consistent way to reproduce a crash.
This is what I explain next.

Steps to reproduce:
1. Open NetBeans
2. Right-click on a project in the project browser
3. Click "Properties", a windows titled "Project Properties" will appear
4. Resize that window during a couple a couple of seconds ()

What should happen: The "Project Properties" window gets resized.

What happens now: NetBeans crashes. If I start it from console (simply typing "netbeans"), on crashing some output appears: "
The program '<unknown>' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 18972 error_code 8 request_code 140 minor_code 4)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)
"

System
* Hardware
** CPU: Intel Core Duo T2400
** GPU: ATI Mobility Radeon X1400
* Software
** Ubuntu 9.10 Karmic Koala Desktop Edition i386
** NetBeans IDE 6.7.1-0ubuntu1 (netbeans)
** Tested with both OpenJDK and Sun Java Runtime Environments
** All packages updated until one hour ago

Let me know if I can provide more significant data.

-- 
experiencing frequent netbeans crashing
https://bugs.launchpad.net/bugs/398280
You received this bug notification because you are a member of OpenJDK,
which is subscribed to openjdk-6 in ubuntu.

Status in “openjdk-6” package in Ubuntu: Confirmed

Bug description:
The last 3 errors all look like this (pids being different of course).  All mention nmethod.cpp line 1836, JavaThread "AWT-EventQueue-1", and libjvm.so.  I can't deliberately reproduce the error but if I run netbeans for long enough it will crash.

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (nmethod.cpp:1836), pid=10665, tid=140316030511440
#  Error: guarantee(cont_offset != 0,"unhandled implicit exception in compiled code")
#
# Java VM: OpenJDK 64-Bit Server VM (14.0-b08 mixed mode linux-amd64 )
# Distribution: Ubuntu 9.04, package 6b14-1.4.1-0ubuntu10
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
#   https://bugs.launchpad.net/ubuntu/+source/openjdk-6/
#

---------------  T H R E A D  ---------------

Current thread (0x0000000000aaf000):  JavaThread "AWT-EventQueue-1" [_thread_in_Java, id=11553, stack(0x00007f9ddf07a000,0x00007f9ddf27b000)]

Stack: [0x00007f9ddf07a000,0x00007f9ddf27b000],  sp=0x00007f9ddf277d60,  free space=2039k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V  [libjvm.so+0x66e7ef]
V  [libjvm.so+0x66eb51]
V  [libjvm.so+0x2cdc26]
V  [libjvm.so+0x52b006]
V  [libjvm.so+0x5bb6e9]
V  [libjvm.so+0x54f017]