# SEGV with flatten and callcc

**URL:** <https://www.ruby-forum.com/t/segv-with-flatten-and-callcc/138335>\
**Category:** Development\
**Created:** [May 22, 2008, 4:39am UTC](https://www.ruby-forum.com/t/segv-with-flatten-and-callcc/138335 "2008-05-22T04:39:42Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [May 22, 2008, 4:39am UTC](https://www.ruby-forum.com/t/segv-with-flatten-and-callcc/138335/1 "2008-05-22T04:39:42Z")

</div>

e$B0J2\<$N$h$&$K$9$k$He(B SEGV e$B$7$^$9!#e(B

% ./ruby -rcontinuation -ve ’  
o = Object.new  
def o.to\_ary() callcc {|k| $k = k; [1,2,3]} end  
p [10,20,o,30,o,40].flatten  
$k.call  
’  
ruby 1.9.0 (2008-05-22 revision 16518) [i686-linux]  
[10, 20, 1, 2, 3, 30, 1, 2, 3, 40]  
-e:4: [BUG] Segmentation fault  
ruby 1.9.0 (2008-05-22 revision 16518) [i686-linux]

## – stack frame ------------ 0000 (0xb7acb008): 00000004 0001 (0xb7acb00c): 081aeb9c 0002 (0xb7acb010): 00000004 0003 (0xb7acb014): 00000001 0004 (0xb7acb018): 081aec64 0005 (0xb7acb01c): 00000004 0006 (0xb7acb020): 081aebb0 0007 (0xb7acb024): 00000004 0008 (0xb7acb028): 081aebd8 0009 (0xb7acb02c): 00000004 0010 (0xb7acb030): 00000001 0011 (0xb7acb034): 00000004 0012 (0xb7acb038): 00000001 \<- lfp \<- dfp – control frame ---------- c:0005 p:---- s:0013 b:0013 l:000012 d:000012 CFUNC :inspect c:0004 p:---- s:0011 b:0011 l:000010 d:000010 CFUNC 😛 c:0003 p:0048 s:0007 b:0007 l:0019a0 d:0019a0 TOP -e:4 c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH :private\_class\_method c:0001 p:0000 s:0002 b:0002 l:0019dc d:0019dc TOP :17

DBG\> : “-e:4:in `p'" DBG> : "-e:4:in`'”  
– backtrace of native function call (Use addr2line) –  
0x8117ed4  
0x813c9ef  
0x813ca27  
0x80daceb  
0xb7f66440  
0xb7e1a9ef  
0x8062b70  
0x8062c41  
0x8062c85  
0x8062cc6  
0x80e0014  
0x80e0044  
0x8066e45  
0x8066e70  
0x8067aa4  
0x811bc14  
0x811bdb9  
0x812375f  
0x810d8fe  
0x810d403  
0x805da8a  
0x805dad8  
0x805dd23  
0x8084626  
0x8072b20  
0x8072b7f  
0x810d8e8  
0x81156fb  
0x8115245  
0x8111744  
0x81158e2  
0x8115f33  
0x805bc06  
0x805bca9  
0x8058d28  
0xb7dc7ea8  
0x8058c31