Weird java crash on runescape

Current thread (0xb4957400):  JavaThread "Thread-6" daemon [_thread_in_native, id=9189, stack(0xb445e000,0xb44af000)]

siginfo:si_signo=SIGFPE: si_errno=0, si_code=1 (FPE_INTDIV), si_addr=0x050bfc3c

Registers:
EAX=0x00000000, EBX=0xa27edf70, ECX=0x00000004, EDX=0x00000000
ESP=0xb44ac9e0, EBP=0xb44acb08, ESI=0x09aea488, EDI=0x00000000
EIP=0x050bfc3c, EFLAGS=0x00010246, CR2=0xb7863100

Top of Stack: (sp=0xb44ac9e0)
0xb44ac9e0:   b44acadc 09aeb96c 00000b28 b5100040
0xb44ac9f0:   00000000 00000000 00000000 00000000
0xb44aca00:   007d2e37 00007fff 02620339 aad67750
0xb44aca10:   aad67934 aad6790c b44acaa8 00000000
0xb44aca20:   00000000 00000000 00000000 ae48da08
0xb44aca30:   01423ff4 b4957400 b44aca98 011ed4f6
0xb44aca40:   b44aca7c aad67808 aad67750 0515afaa
0xb44aca50:   b4957520 b44acb10 00000042 9050ee30 

Instructions: (pc=0x050bfc3c)
0x050bfc1c:   bf b8 46 02 00 00 c1 e3 04 03 58 1c f3 0f 10 43
0x050bfc2c:   04 89 7d 80 f3 0f 2c d0 c1 e2 10 89 d0 c1 fa 1f
0x050bfc3c:   f7 ff 8b 55 10 39 d0 89 45 a4 0f 8c ac fe ff ff
0x050bfc4c:   f3 0f 11 43 04 eb b5 0f b6 45 10 8d 14 85 00 00 

Register to memory mapping:

EAX=0x00000000 is an unknown value
EBX=0xa27edf70 is an unknown value
ECX=0x00000004 is an unknown value
EDX=0x00000000 is an unknown value
ESP=0xb44ac9e0 is pointing into the stack for thread: 0xb4957400
EBP=0xb44acb08 is pointing into the stack for thread: 0xb4957400
ESI=0x09aea488 is an unknown value
EDI=0x00000000 is an unknown value


Stack: [0xb445e000,0xb44af000],  sp=0xb44ac9e0,  free space=314k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [libsw3d.so+0x137c3c]  model::hillchange(int, int, ground&, ground*, int, int, int)+0x60c
C  [libsw3d.so+0x644c3]  Java_h_pa+0x83
J  h.pa(IILxa;Lxa;III)V
J  sw.l(Lra;IIILxa;Lxa;IIIZLsl;B)Ltu;
j  wx.be(Lra;B)Lnq;+12
j  nw.af(Ladb;[Labp;)V+266
j  nw.av(Z[[[BIBI)V+1393
j  nw.ap(IIII[[[B[I[I[I[I[IIBIIZZIZ)V+1239
j  ni.iu(IIIIZI)V+1998
J  yw.lm([Les;IIIIIIIIZI)V
j  qf.ic(J)V+152
J  client.ff(B)V
j  java.lang.Thread.run()V+11
v  ~StubRoutines::call_stub
V  [libjvm.so+0x20a7d2]  JavaCalls::call_helper(JavaValue*, methodHandle*, JavaCallArguments*, Thread*)+0x262
V  [libjvm.so+0x304539]  os::os_exception_wrapper(void (*)(JavaValue*, methodHandle*, JavaCallArguments*, Thread*), JavaValue*, methodHandle*, JavaCallArguments*, Thread*)+0x19
V  [libjvm.so+0x209ccf]  JavaCalls::call(JavaValue*, methodHandle, JavaCallArguments*, Thread*)+0x2f
V  [libjvm.so+0x20a14a]  JavaCalls::call_virtual(JavaValue*, KlassHandle, symbolHandle, symbolHandle, JavaCallArguments*, Thread*)+0xea
V  [libjvm.so+0x20a2a8]  JavaCalls::call_virtual(JavaValue*, Handle, KlassHandle, symbolHandle, symbolHandle, Thread*)+0x58
V  [libjvm.so+0x23b70f]  thread_entry(JavaThread*, Thread*)+0x7f
V  [libjvm.so+0x3af71c]  JavaThread::thread_main_inner()+0x6c
V  [libjvm.so+0x3af7f9]  JavaThread::run()+0xc9
V  [libjvm.so+0x302771]  java_start(Thread*)+0x121
C  [libpthread.so.0+0x5e99]  start_thread+0xd9

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J  h.pa(IILxa;Lxa;III)V
J  sw.l(Lra;IIILxa;Lxa;IIIZLsl;B)Ltu;
j  cl.o(Lra;IZZB)Lqa;+1042
j  wx.be(Lra;B)Lnq;+12
j  nw.af(Ladb;[Labp;)V+266
j  nw.av(Z[[[BIBI)V+1393
j  nw.ap(IIII[[[B[I[I[I[I[IIBIIZZIZ)V+1239
j  ni.iu(IIIIZI)V+1998
J  yw.lm([Les;IIIIIIIIZI)V
J  yw.lm([Les;IIIIIIIIZI)V
J  yw.lm([Les;IIIIIIIIZI)V
J  uf.lk(IIIIIIIII)V
j  vm.kf(I)V+29
j  qf.ic(J)V+152
J  client.ff(B)V
J  client.aj(I)V
J  mm.m(I)V
J  mm.s(B)V
j  mm.run()V+3
j  java.lang.Thread.run()V+11
v  ~StubRoutines::call_stub

---------------  P R O C E S S  ---------------

Java Threads: ( => current thread )
  0x0a5cd000 JavaThread "Thread-16" daemon [_thread_blocked, id=9243, stack(0xb4b8c000,0xb4bdd000)]
  0x0a5cc800 JavaThread "Thread-15" daemon [_thread_in_native, id=9242, stack(0xb416b000,0xb41bc000)]
  0xb3f73c00 JavaThread "Thread-11" daemon [_thread_blocked, id=9205, stack(0xb420d000,0xb425e000)]
  0xb46a2800 JavaThread "PulseAudio Eventloop Thread" daemon [_thread_in_native, id=9204, stack(0xb411a000,0xb416b000)]
  0x09973c00 JavaThread "Thread-10" daemon [_thread_blocked, id=9198, stack(0xb4078000,0xb40c9000)]
  0x09978000 JavaThread "Thread-9" daemon [_thread_in_native, id=9197, stack(0xb40c9000,0xb411a000)]
  0x09965800 JavaThread "Thread-8" daemon [_thread_blocked, id=9191, stack(0xb42af000,0xb4300000)]
  0x0993e800 JavaThread "Thread-7" daemon [_thread_blocked, id=9190, stack(0xb440d000,0xb445e000)]
  0xb4950000 JavaThread "DestroyJavaVM" [_thread_blocked, id=9169, stack(0xb77fb000,0xb784c000)]
=>0xb4957400 JavaThread "Thread-6" daemon [_thread_in_native, id=9189, stack(0xb445e000,0xb44af000)]
  0xb4927800 JavaThread "Thread-5" daemon [_thread_blocked, id=9188, stack(0xb44af000,0xb4500000)]
  0xb3f6a800 JavaThread "Thread-4" [_thread_blocked, id=9187, stack(0xb4a43000,0xb4a94000)]
  0xb49a0000 JavaThread "Thread-3" [_thread_blocked, id=9186, stack(0xb4c63000,0xb4cb4000)]
  0x099b3400 JavaThread "Thread-2" daemon [_thread_blocked, id=9185, stack(0xb4a97000,0xb4ae8000)]
  0x099b2400 JavaThread "Thread-1" daemon [_thread_blocked, id=9184, stack(0xb4ae8000,0xb4b39000)]
  0x09910400 JavaThread "AWT-EventQueue-0" [_thread_blocked, id=9182, stack(0xb4b3b000,0xb4b8c000)]
  0x09908c00 JavaThread "AWT-Shutdown" [_thread_blocked, id=9179, stack(0xb4bdd000,0xb4c2e000)]
  0x098cf800 JavaThread "AWT-XAWT" daemon [_thread_in_native, id=9178, stack(0xb4cb4000,0xb4d05000)]
  0x098a2800 JavaThread "Java2D Disposer" daemon [_thread_blocked, id=9177, stack(0xb4d8c000,0xb4ddd000)]
  0x0987f800 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=9175, stack(0xb4e5e000,0xb4eaf000)]
  0x0987d800 JavaThread "C1 CompilerThread0" daemon [_thread_blocked, id=9174, stack(0xb5222000,0xb52a3000)]
  0x0987bc00 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=9173, stack(0xb52a3000,0xb52f4000)]
  0x09877800 JavaThread "Finalizer" daemon [_thread_blocked, id=9172, stack(0xb50af000,0xb5100000)]
  0x09873000 JavaThread "Reference Handler" daemon [_thread_blocked, id=9171, stack(0xb52f4000,0xb5345000)]

Other Threads:
  0x09871000 VMThread [stack: 0xb5345000,0xb53c6000] [id=9170]
  0xb510ac00 WatcherThread [stack: 0xb4ddd000,0xb4e5e000] [id=9176]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
 def new generation   total 31552K, used 25862K [0x709c0000, 0x72bf0000, 0x7af10000)
  eden space 28096K,  91% used [0x709c0000, 0x722f9ae8, 0x72530000)
  from space 3456K,   0% used [0x72530000, 0x72538048, 0x72890000)
  to   space 3456K,   0% used [0x72890000, 0x72890000, 0x72bf0000)
 tenured generation   total 69924K, used 60121K [0x7af10000, 0x7f359000, 0x8f9c0000)
   the space 69924K,  85% used [0x7af10000, 0x7e9c6520, 0x7e9c6600, 0x7f359000)
 compacting perm gen  total 14080K, used 13859K [0x8f9c0000, 0x90780000, 0x939c0000)
   the space 14080K,  98% used [0x8f9c0000, 0x90748c98, 0x90748e00, 0x90780000)
    ro space 10240K,  73% used [0x939c0000, 0x94120cc8, 0x94120e00, 0x943c0000)
    rw space 12288K,  60% used [0x943c0000, 0x94b0a478, 0x94b0a600, 0x94fc0000)

Code Cache  [0xb57fb000, 0xb5f5b000, 0xb77fb000)
 total_blobs=2027 nmethods=1687 adapters=274 free_code_cache=25822464 largest_free_block=64