# Self-calling method dumps core

**URL:** <https://www.ruby-forum.com/t/self-calling-method-dumps-core/122434>\
**Category:** Development\
**Created:** [December 7, 2007, 4:15pm UTC](https://www.ruby-forum.com/t/self-calling-method-dumps-core/122434 "2007-12-07T16:15:04Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [December 7, 2007, 4:15pm UTC](https://www.ruby-forum.com/t/self-calling-method-dumps-core/122434/1 "2007-12-07T16:15:04Z")

</div>

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## $ ruby-trunk -ve ‘def a; a; end; a’ ruby 1.9.0 (2007-12-07 patchlevel 0) [i686-linux] -e:1: – control frame ---------- c:7710 p:0007 s:23127 b:23126 l:003125 d:003125 METHOD -e:1 c:7709 p:0007 s:23123 b:23123 l:003122 d:003122 METHOD -e:1 c:7708 p:0007 s:23120 b:23120 l:003119 d:003119 METHOD -e:1 c:7707 p:0007 s:23117 b:23117 l:003116 d:003116 METHOD -e:1 c:7706 p:0007 s:23114 b:23114 l:003113 d:003113 METHOD -e:1 c:7705 p:0007 s:23111 b:23111 l:003110 d:003110 METHOD -e:1 (snip) c:0009 p:0007 s:0023 b:0023 l:000022 d:000022 METHOD -e:1 c:0008 p:0007 s:0020 b:0020 l:000019 d:000019 METHOD -e:1 c:0007 p:0007 s:0017 b:0017 l:000016 d:000016 METHOD -e:1 c:0006 p:0007 s:0014 b:0014 l:000013 d:000013 METHOD -e:1 c:0005 p:0007 s:0011 b:0011 l:000010 d:000010 METHOD -e:1 c:0004 p:0007 s:0008 b:0008 l:000007 d:000007 METHOD -e:1 c:0003 p:0012 s:0005 b:0005 l:000004 d:000004 TOP -e:1 c:0002 p:---- s:0003 b:0003 l:000002 d:000002 FINISH :inherited c:0001 p:---- s:0001 b:-001 l:000000 d:000000 ------

## DBG\> : “-e:1:in `a'" DBG> : "-e:1:in`a’” DBG\> : “-e:1:in `a'" (snip) DBG> : "-e:1:in`a’” DBG\> : “-e:1:in `a'" DBG> : "-e:1:in`'” – backtrace of native function call (Use addr2line) – 0xb7ece4f7 0xb7e17eb5 0xb7e17f99 0xb7e2ce2f 0xb7ec2e7d 0xb7e2ce3e 0xb7ec2dfd 0xb7e92d5f 0xb7ec31fd 0xb7e2ce3e 0xb7e2d720 0xb7e2e0c5 0xb7e98942 0xb7e989ed 0xb7e8f217 0xb7e90057 0xb7ec4162 0xb7e1a6b6 0xb7e1e107 0xb7e1e233 0xb7ec5ce9 0xb7ec8ee1 0xb7eccb91 0xb7eccf10 0xb7e1b80b 0xb7e2011a 0x80486ce 0xb7c41ea8 0x80485e1

[BUG] rb\_gc\_mark(): unknown data type 0x18(0xb7bc0968) non object  
ruby 1.9.0 (2007-12-07) [i686-linux]

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$ ruby-trunk -ve ‘$i=0; def a; p $i += 1; a; end; a’  
ruby 1.9.0 (2007-12-07 patchlevel 0) [i686-linux]  
1  
2  
3  
(snip)  
7704  
7705  
7706  
false  
-e:1: – control frame ----------  
c:7710 p:-33706527 s:302957567 b:23126 l:003125 d:003125 METHOD -e:1  
c:7709 p:0023 s:23123 b:23123 l:003122 d:003122 METHOD -e:1  
c:7708 p:0023 s:23120 b:23120 l:003119 d:003119 METHOD -e:1  
c:7707 p:0023 s:23117 b:23117 l:003116 d:003116 METHOD -e:1  
c:7706 p:0023 s:23114 b:23114 l:003113 d:003113 METHOD -e:1  
c:7705 p:0023 s:23111 b:23111 l:003110 d:003110 METHOD -e:1  
c:7704 p:0023 s:23108 b:23108 l:003107 d:003107 METHOD -e:1  
(snip)

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<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [December 9, 2007, 4:22am UTC](https://www.ruby-forum.com/t/self-calling-method-dumps-core/122434/2 "2007-12-09T04:22:55Z")

</div>

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At Sat, 8 Dec 2007 00:12:57 +0900,  
Tadashi S. wrote in [ruby-dev:32485]:

> e$B\<+J,\<+?H$NI\>2A7k2L$rJV$9%a%=%C%I$r8F$V$He(Bcoree$B$rEG$/$h$&$G$9!#e(B

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> e$B$J$\*e(B1.8e$B$G$O!"e(BSystemStackErrore$B$H$J$j$^$9!#e(B

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sigaltstack()e$B$r;H$($P%9%?%C%/%\*!\<%P!\<%U%m!\<$G$b%O%s%I%i$r8F$V$he(B  
e$B$&$K$O$G$-$k$N$G$9$,!"DL\>o$Ne(BSEGVe$B$H6hJL$9$k%]!\<%?%V%k$JJ}K!$,$J$$e(B  
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<div class="post-metadata">

**Author:** ![sugie](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/82dd89/32.png) [@sugie](https://www.ruby-forum.com/u/sugie)\
**Post date:** [December 9, 2007, 6:47am UTC](https://www.ruby-forum.com/t/self-calling-method-dumps-core/122434/3 "2007-12-09T06:47:52Z")

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Nobuyoshi N. wrote:

> e$B$3$l$O$:$C$H7|0F$J$N$G$9$,!“I,$:$7$bNc30$G;\_$a$i$l$k$o$1$G$O$”$je(B  
> e$B$^$;$s!#e(B1.8e$B$G$be(BSEGVe$B$K$J$k$3$H$b$"$l$P!“e(B1.9e$B$G$be(BSystemStackErrore$B$Ke(B  
> e$B$J$k$3$H$b$”$j$^$9!#e(B
> 
> sigaltstack()e$B$r;H$($P%9%?%C%/%\*!\<%P!\<%U%m!\<$G$b%O%s%I%i$r8F$V$he(B  
> e$B$&$K$O$G$-$k$N$G$9$,!"DL\>o$Ne(BSEGVe$B$H6hJL$9$k%]!\<%?%V%k$JJ}K!$,$J$$e(B  
> e$B$N$G$9!#e(B

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