r2340 callback crashes

[gid15]

Code:

0x8C88FE8 - addiu $sp, $sp, -16
0x8C88FEC - sw $ra, 0($sp)
0x8C88FF0 - andi $a0, $a0, -1
0x8C88FF4 - lw $v0, 4($a1)
0x8C88FF8 - bne $v0, $zr, 0x08C8900C
0x8C88FFC - addu $a1, $a2, $zr <=> move $a1, $a2
0x8C89000 - lw $ra, 0($sp)
0x8C89004 - jr $ra
0x8C89008 - addiu $sp, $sp, 16
0x8C8900C - jalr $ra, $v0
0x8C89010 - nop
0x8C89014 - j 0x08C89004
0x8C89018 - lw $ra, 0($sp)

Catched Throwable in executeCallback:
java.lang.NullPointerException
     at _S1_3_8C88FE8.s(_S1_3_8C88FE8.java:32)

Line 32 is "0x8C89008 - addiu $sp, $sp, 16" and a NullPointerException doesn't make sense at that place. I've checked the compiled Java code and I can't see where the exception is coming from.

Oh, I just saw you are using Java 1.7

Code:

Java version: 1.7.0 (1.7.0-b147)

Could you try again with java 1.6? This problem sounds like a JVM bug to me...