こんにちは、なかむら(う)です。

irbを実行して抜けるだけでcoreを吐きます。
下記はNetBSDでの実行例ですが、mswin32でも同様なので、たぶんど
こでも再現するのでしょう。

[usa@zanzibar] % irb20
irb(main):001:0> exit
/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb.rb: -- stack frame ------------
0x81e6000 (0000): 00000001
0x81e6004 (0001): 00000004
0x81e6008 (0002): 081a7f20
0x81e600c (0003): 082bd4cc
0x81e6010 (0004): 08266528
0x81e6014 (0005): 082ac0c8
0x81e6018 (0006): 00000004
0x81e601c (0007): 0829de24
0x81e6020 (0008): 082bd4cc
0x81e6024 (0009): 002a5d0e
0x81e6028 (0010): 08265f75
0x81e602c (0011): 00000001
0x81e6030 (0012): 0837424d
0x81e6034 (0013): 082ac0c8
0x81e6038 (0014): 00000004
0x81e603c (0015): 0829dd34
0x81e6040 (0016): 082a7b18
0x81e6044 (0017): 00000004
0x81e6048 (0018): 08265ed5
0x81e604c (0019): 082a7b18
0x81e6050 (0020): 0036a50e
0x81e6054 (0021): 08265ead
0x81e6058 (0022): 00000001
0x81e605c (0023): 081e6049 (= 18)
0x81e6060 (0024): 082a7b18
0x81e6064 (0025): 08265e35
0x81e6068 (0026): 00000001
0x81e606c (0027): 0829be44
0x81e6070 (0028): 081e605d (= 23)
0x81e6074 (0029): 0829d488
0x81e6078 (0030): 00000003
0x81e607c (0031): 08374265
0x81e6080 (0032): 082ac0c8
0x81e6084 (0033): 002bb50e
0x81e6088 (0034): 002ac50e
0x81e608c (0035): 00000004
0x81e6090 (0036): 08265d95 <- lfp
0x81e6094 (0037): 00000004
0x81e6098 (0038): 002a5d0e
0x81e609c (0039): 081e6091 (= 36) <- dfp
-- control frame ----------
c:0018 p:0009 s:0040 b:0040 l:0036 d:0039 BLOCK  i:ensure in signal_status s:   
c:0017 p:0032 s:0038 b:0037 l:0036 d:0036 METHOD i:signal_status s:
c:0016 p:0009 s:0032 b:0032 l:0705 d:0031 BLOCK  i:block in eval_input s:       
c:0015 p:0102 s:0029 b:0029 l:0018 d:0028 BLOCK  i:block (2 levels) in each_top_level_statement s:
c:0014 p:-001 s:0027 b:0027 l:0026 d:0026 FINISH i:-        s:
c:0013 p:-001 s:0026 b:0026 l:0025 d:0025 CFUNC  i:loop     s:
c:0012 p:0007 s:0024 b:0024 l:0018 d:0023 BLOCK  i:block in each_top_level_statement s:
c:0011 p:-001 s:0023 b:0023 l:0022 d:0022 FINISH i:-        s:
c:0010 p:-001 s:0022 b:0022 l:0021 d:0021 CFUNC  i:catch    s:
c:0009 p:0017 s:0019 b:0019 l:0018 d:0018 METHOD i:each_top_level_statement s:  
c:0008 p:0034 s:0016 b:0016 l:0705 d:0705 METHOD i:eval_input s:
c:0007 p:0008 s:0013 b:0013 l:0699 d:0012 BLOCK  i:block in start s:
c:0006 p:-001 s:0012 b:0012 l:0011 d:0011 FINISH i:-        s:
c:0005 p:-001 s:0011 b:0011 l:0010 d:0010 CFUNC  i:catch    s:         -
c:0004 p:0172 s:0008 b:0008 l:0699 d:0699 METHOD i:start    s:
c:0003 p:0037 s:0003 b:0003 l:-599 d:-599 TOP    i:<main>   s:         -
c:0002 p:-001 s:0001 b:0001 l:0000 d:0000 FINISH i:-        s:         -
c:0001 p:-001 s:0000 b:-001 l:0000 d:0000 ------ i:-        s:         -
---------------------------
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb.rb:261:in `signal_status'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb.rb:147:in `block in eval_input'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb/ruby-lex.rb:244:in `block (2 levels) in each_top_level_statement'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb/ruby-lex.rb:230:in `loop'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb/ruby-lex.rb:230:in `block in each_top_level_statement'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb/ruby-lex.rb:229:in `catch'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb/ruby-lex.rb:229:in `each_top_level_statement'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb.rb:146:in `eval_input'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb.rb:70:in `block in start'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb.rb:69:in `catch'"
DBG> : "/home/usa/ruby/ruby-yarv/lib/ruby/2.0/irb.rb:69:in `start'"
DBG> : "/home/usa/bin/irb20:13:in `<main>'"
[BUG] Segmentation fault
ruby 2.0.0 (2006-02-14) [i386-netbsdelf3.99.7]

zsh: 9825 abort (core dumped)  irb20
(中略)
(gdb) bt
#0  0xbdb09f1b in kill () from /usr/lib/libc.so.12
#1  0xbdb8ee53 in abort () from /usr/lib/libc.so.12
#2  0x080c8890 in rb_bug (fmt=0x80f1ffc "Segmentation fault") at ../error.c:171
#3  0x0809e652 in sigsegv (sig=11) at ../signal.c:432
#4  <signal handler called>


それでは。
-- 
U.Nakamura <usa garbagecollect.jp>



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