From: Tanaka Akira <akr@...>
Date: 2007-09-30T11:21:59+09:00
Subject: [ruby-dev:31911] eval("", TOPLEVEL_BINDING) and ObjectSpace._id2ref

以下のようにすると SEGV します。

% ./ruby -e '
eval("", TOPLEVEL_BINDING)
minobj = ObjectSpace.to_enum(:each_object).min {|a,b| a.object_id <=> b.object_id }
maxobj = ObjectSpace.to_enum(:each_object).max {|a,b| a.object_id <=> b.object_id }
minobj.object_id.upto(maxobj.object_id) {|id|
  begin
    o = ObjectSpace._id2ref(id)
  rescue RangeError
    next
  end
  o.inspect
}
'
-e:11: -- control frame ----------
c:0006 p:0031 s:0017 b:0016 l:000006 d:000015 BLOCK  -e:11
c:0005 p:---- s:0014 b:0013 l:000012 d:000012 FINISH :each
c:0004 p:---- s:0011 b:0011 l:000010 d:000010 CFUNC  :upto
c:0003 p:0085 s:0007 b:0007 l:000006 d:000006 TOP    -e:5
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:5:in `upto'"
DBG> : "-e:5:in `<main>'"
-- backtrace of native function call (Use addr2line) --
0x80e0fc5
0x80fcaf3
0x80fcbbb
0x80b3ad0
0xb7f4b420
0x8057df4
0x8057e43
0x8057f1c
0x80dece5
0x80df894
0x80d8a85
0x805a1de
0x80723cf
0x80d9576
0x80dc1bc
0x80df894
0x80dfbcb
0x8059b09
0x805d40d
0x80577b0
0xb7db5ea8
0x80576d1
-------------------------------------------------------
[BUG] Segmentation fault
ruby 1.9.0 (2007-09-30) [i686-linux]
-- 
[田中 哲][たなか あきら][Tanaka Akira]