From: Peter Zotov <whitequark@...>
Date: 2009-03-31T07:15:04+09:00
Subject: Problems with GC.. again

Hi.

Again, I ran into some kind of wrongly garbage collected object, but  
can't determine exactly which one.

Sources is at:
http://files.whitequark.ru/rlua.tgz

Try:
ruby1.9 extconf.rb
make
ruby1.9 test.rb

A segfault!
----%<----
test.rb:21: [BUG] Segmentation fault
ruby 1.9.0 (2008-06-20 revision 17482) [i486-linux]

-- control frame ----------
c:0004 p:---- s:0013 b:0013 l:000012 d:000012 CFUNC  :method_missing
c:0003 p:0099 s:0011 b:0009 l:001d58 d:001d58 TOP    test.rb:21
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH :private_class_method
c:0001 p:0000 s:0002 b:0002 l:000001 d:000001 TOP    <dummy toplevel>:16
---------------------------
DBG> : "test.rb:21:in `method_missing'"
DBG> : "test.rb:21:in `<main>'"
-- backtrace of native function call (Use addr2line) --
0xb7eefc46
0xb7e193a9
0xb7e1941a
0xb7ea0a56
0xb7f6340c
0xb7eda91e
0xb7eda980
0xb7ee7b07
0xb7eead9d
0xb7f5d300
0xb79b5912
0xb79b5d66
0xb79be502
0xb79b1a2e
0xb7f5cde6
0xb7f5d14f
0xb7edbc30
0xb7ee7dbd
0xb7ee848e
0xb7ee8546
0xb7eded81
0xb7ee08b4
0xb7ee6a84
0xb7ee6cad
0xb7e1bbd7
0xb7e1d156
0x8048794
0xb7c0c775
0x8048681
----%<----

   WBR, Peter Zotov

P. S. Can someone show me how does addr2line work? It doesn't show  
anything other than "??" with /usr/bin/ruby1.9,  
/usr/lib/libruby1.9.so, ./rlua.so... May this be because Debian  
binaries are stripped?