[Bug] java.lang.ArrayIndexOutOfBoundsException [sf#70]

[lsf37]

Reported by bineshb on 2004-11-05 04:11 UTC
I have an extremely simple parser, which chokes on a
file with java.lang.ArrayIndexOutOfBoundsException at
the arraycopy in the function below...

private boolean zzRefill() throws java.io.IOException {

/* first: make room (if you can) */
if (zzStartRead > 0) {
System.arraycopy(zzBuffer, zzStartRead,
zzBuffer, 0,
zzEndRead-zzStartRead);

/* translate stored positions */
zzEndRead-= zzStartRead;
zzCurrentPos-= zzStartRead;
zzMarkedPos-= zzStartRead; 
zzPushbackPos-= zzStartRead;
zzStartRead = 0;  
}

I don't know the cause, but, I've attached the classes
and the data, and a cmd shell to drive it.

good.txt works, and problem.txt doesn't work... If you
diff them, you'll see that all I did was replace the
carriage return on line 625 with a space.

I noticed an interesting thing, if I took out %line
from the parser, then I don't get the error...

[lsf37]

Commented by bineshb on 2004-11-05 04:11 UTC
Zip file of the parser and the error file.

[lsf37]

Commented by lsf37 on 2004-11-05 13:31 UTC
Logged In: YES
user_id=93534

Thanks for the simple test case. This might be a duplicate
of bug #62 (buffer expansion bug in yy_refill()) which
should be fixed in the repository version. I'll try to take
a closer look at this over the weekend

Gerwin

[lsf37]

Updated by lsf37 on 2004-11-05 13:31 UTC

• labels: --> backend/codegen
• assigned_to: nobody --> lsf37
• status: open --> open-accepted

[lsf37]

Commented by lsf37 on 2004-11-06 08:08 UTC
Logged In: YES
user_id=93534

I can confirm now that this is another manifestation of bug #62.
The repository version contains a fix, it will be released with the next JFlex version.

Gerwin

[lsf37]

Updated by lsf37 on 2004-11-06 08:08 UTC

• status: open-accepted --> closed