Adding GrooveJoint to space causes segfault

[RavensKrag]

/var/lib/gems/1.9.1/gems/chipmunk-ffi-1.1.0/lib/chipmunk-ffi/space.rb:261: [BUG] Segmentation fault
ruby 1.9.2p0 (2010-08-18 revision 29036) [x86_64-linux]

-- control frame ----------
c:0018 p:---- s:0090 b:0090 l:000089 d:000089 CFUNC  :cpSpaceAddConstraint
c:0017 p:0040 s:0085 b:0085 l:000084 d:000084 METHOD /var/lib/gems/1.9.1/gems/chipmunk-ffi-1.1.0/lib/chipmunk-ffi/space.rb:261
c:0016 p:0083 s:0081 b:0081 l:000080 d:000080 METHOD /home/ravenskrag/Code/Source/eternity/Physics/Physics.rb:106
c:0015 p:0026 s:0077 b:0077 l:000076 d:000076 METHOD /home/ravenskrag/Code/Source/eternity/Physics/Physics.rb:86
c:0014 p:0136 s:0071 b:0071 l:000070 d:000070 METHOD /home/ravenskrag/Code/Source/eternity/Physics/Physics.rb:161
c:0013 p:---- s:0061 b:0061 l:000060 d:000060 FINISH
c:0012 p:---- s:0059 b:0059 l:000058 d:000058 CFUNC  :new
c:0011 p:0124 s:0051 b:0051 l:000050 d:000050 METHOD /home/ravenskrag/Code/Source/eternity/GameObjects/Entity.rb:30
c:0010 p:0114 s:0039 b:0039 l:000038 d:000038 METHOD /home/ravenskrag/Code/Source/eternity/GameObjects/Character.rb:23
c:0009 p:0060 s:0030 b:0030 l:000029 d:000029 METHOD /home/ravenskrag/Code/Source/eternity/GameObjects/Player.rb:22
c:0008 p:---- s:0022 b:0022 l:000021 d:000021 FINISH
c:0007 p:---- s:0020 b:0020 l:000019 d:000019 CFUNC  :new
c:0006 p:0206 s:0015 b:0015 l:000660 d:000660 METHOD ./init_game.rb:79
c:0005 p:---- s:0011 b:0011 l:000010 d:000010 FINISH
c:0004 p:---- s:0009 b:0009 l:000008 d:000008 CFUNC  :new
c:0003 p:0179 s:0006 b:0006 l:001128 d:0001f8 EVAL   ./init_game.rb:276
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:001128 d:001128 TOP   
---------------------------
-- Ruby level backtrace information ----------------------------------------
./init_game.rb:276:in `<main>'
./init_game.rb:276:in `new'
./init_game.rb:79:in `initialize'
./init_game.rb:79:in `new'
/home/ravenskrag/Code/Source/eternity/GameObjects/Player.rb:22:in `initialize'
/home/ravenskrag/Code/Source/eternity/GameObjects/Character.rb:23:in `initialize'
/home/ravenskrag/Code/Source/eternity/GameObjects/Entity.rb:30:in `initialize'
/home/ravenskrag/Code/Source/eternity/GameObjects/Entity.rb:30:in `new'
/home/ravenskrag/Code/Source/eternity/Physics/Physics.rb:161:in `initialize'
/home/ravenskrag/Code/Source/eternity/Physics/Physics.rb:86:in `initialize'
/home/ravenskrag/Code/Source/eternity/Physics/Physics.rb:106:in `link_side_and_bottom'
/var/lib/gems/1.9.1/gems/chipmunk-ffi-1.1.0/lib/chipmunk-ffi/space.rb:261:in `add_constraint'
/var/lib/gems/1.9.1/gems/chipmunk-ffi-1.1.0/lib/chipmunk-ffi/space.rb:261:in `cpSpaceAddConstraint'

-- C level backtrace information -------------------------------------------
/usr/lib/libruby-1.9.1.so.1.9(rb_vm_bugreport+0x5f) [0x7f52ff9bae8f]
/usr/lib/libruby-1.9.1.so.1.9(+0x58a56) [0x7f52ff8c5a56]
/usr/lib/libruby-1.9.1.so.1.9(rb_bug+0xb3) [0x7f52ff8c5bc3]
/usr/lib/libruby-1.9.1.so.1.9(+0xedde5) [0x7f52ff95ade5]
/lib/libpthread.so.0(+0xfb40) [0x7f52ff65fb40]
/usr/local/lib/libchipmunk.so.5.3.4(+0x63d5) [0x7f52f55363d5]
/usr/local/lib/libchipmunk.so.5.3.4(cpBodyActivate+0x18) [0x7f52f55367e8]
/usr/local/lib/libchipmunk.so.5.3.4(cpSpaceAddConstraint+0x29) [0x7f52f5537f99]
/var/lib/gems/1.9.1/gems/ffi-1.0.6/lib/ffi_c.so(ffi_call_unix64+0x4c) [0x7f52f5761a74]
/var/lib/gems/1.9.1/gems/ffi-1.0.6/lib/ffi_c.so(ffi_call+0x3ef) [0x7f52f57614e4]
/var/lib/gems/1.9.1/gems/ffi-1.0.6/lib/ffi_c.so(rbffi_CallFunction+0x100) [0x7f52f57503c0]
/usr/lib/libruby-1.9.1.so.1.9(+0x147258) [0x7f52ff9b4258]
/usr/lib/libruby-1.9.1.so.1.9(+0x13f410) [0x7f52ff9ac410]
/usr/lib/libruby-1.9.1.so.1.9(+0x143e31) [0x7f52ff9b0e31]
/usr/lib/libruby-1.9.1.so.1.9(+0x14611f) [0x7f52ff9b311f]
/usr/lib/libruby-1.9.1.so.1.9(rb_class_new_instance+0x30) [0x7f52ff906e20]
/usr/lib/libruby-1.9.1.so.1.9(+0x147258) [0x7f52ff9b4258]
/usr/lib/libruby-1.9.1.so.1.9(+0x13f410) [0x7f52ff9ac410]
/usr/lib/libruby-1.9.1.so.1.9(+0x143e31) [0x7f52ff9b0e31]
/usr/lib/libruby-1.9.1.so.1.9(+0x14611f) [0x7f52ff9b311f]
/usr/lib/libruby-1.9.1.so.1.9(rb_class_new_instance+0x30) [0x7f52ff906e20]
/usr/lib/libruby-1.9.1.so.1.9(+0x147258) [0x7f52ff9b4258]
/usr/lib/libruby-1.9.1.so.1.9(+0x13f410) [0x7f52ff9ac410]
/usr/lib/libruby-1.9.1.so.1.9(+0x143e31) [0x7f52ff9b0e31]
/usr/lib/libruby-1.9.1.so.1.9(+0x14611f) [0x7f52ff9b311f]
/usr/lib/libruby-1.9.1.so.1.9(rb_class_new_instance+0x30) [0x7f52ff906e20]
/usr/lib/libruby-1.9.1.so.1.9(+0x147258) [0x7f52ff9b4258]
/usr/lib/libruby-1.9.1.so.1.9(+0x13f410) [0x7f52ff9ac410]
/usr/lib/libruby-1.9.1.so.1.9(+0x143e31) [0x7f52ff9b0e31]
/usr/lib/libruby-1.9.1.so.1.9(rb_iseq_eval_main+0xb2) [0x7f52ff9b1082]
/usr/lib/libruby-1.9.1.so.1.9(+0x5bd52) [0x7f52ff8c8d52]
/usr/lib/libruby-1.9.1.so.1.9(ruby_exec_node+0x1d) [0x7f52ff8c8d7d]
/usr/lib/libruby-1.9.1.so.1.9(ruby_run_node+0x1e) [0x7f52ff8ca63e]
ruby(main+0x4b) [0x40092b]
/lib/libc.so.6(__libc_start_main+0xfe) [0x7f52fea23d8e]
ruby() [0x400819]

[NOTE]
You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome.
For details: http://www.ruby-lang.org/bugreport.html

Aborted

[RavensKrag]

Thought I had isolated this to a chipmunk-ffi error for sure. Just ran it in IRB to make sure, and now it seems to be related to my code.

Sorry about that.

[shawn42]

Oh, no problem. Thanks for the update so I didn't go chase this. I'd like to see what you're building w/ chipmunk-ffi. Is your code public somewhere?

[RavensKrag]

Yeah, check out my eternity repo here on github. Here's the link for you.

https://github.com/RavensKrag/eternity

Hopefully I'll get some stuff rolled out for chipmunk-ffi soon as well.