Andrew Zhang wrote:
On 10/10/07, Tim Ellison <[EMAIL PROTECTED]> wrote:
Gregory Shimansky wrote:
Andrew Zhang wrote:
Hi all,
I meet a problem when debugging java application with M3. It throws NPE
immediately after pressing F5/F6. Here's simple test:
public static void main(String[] args) {
int count = 100;
for(int i = 0; i < count; ++i) {
System.out.println(i); // put a breakpoint here.
}
}
It looks like a serious bug. It's reproducible here, with Eclipse 3.2.2
.
Thanks!
I tried both M3 JDK snapshot for libstdc++.so.6 and current local debug
development build of harmony, I couldn't reproduce this. Could you
please give more details which platform you are using and how you are
running this test? How does NPE stack trace look like?
Hi,
Here are some more details:
NPE stack trace:
Thread [main] (Suspended)
NullPointerException.<init>() line: 34
AbstractInterruptibleChannel.<clinit>() line: 57 [local variables
unavailable]
Hmm. This isn't exactly what I wanted to see. I just wanted to see the
NPE stack trace that a program would print out when it throws an
uncaught NPE in main(). It is quite strange for me to see that you've
somehow stepped into AbstractInterruptibleChannel. There is no main()
function on the bottom of the stack either...
I tried debugging on windows with M3 build and current development debug
build and still I don't get any NPEs. When I press F5 on line with
println, for the 1st time it steps into VM.intern, for other times it
steps into PrintStream.println. Sources for these classes aren't found,
but I can step out back to main() function.
Platform information:
JRE: harmony-jre-580985
Eclipse: Version: 3.2.2 Build id: M20070212-1330
OS: Microsoft Windows Server 2003 R2 Standard Edition Service Pack 1
(Running on a VM)
The way to debug the application: Debug As -> Debug ..., select Harmony as
the JRE and put a breakpoint at any line. The program halts at the specified
breakpoint as expected, but if you press F5 or F6, it throws the NPE. Any
idea?
It doesn't have any problem to run the application against Harmony.
Thanks!
Works for me too on Windows M3 JDK build with Eclipse 3.3.
Andrew: Could you give us the precise steps to reproduce?
Regards,
Tim
--
Gregory
