backport r33013 from trunk.
iseq.c (iseq_s_disasm): fix a bug that may cause SEGV.
test/ruby/test_method.rb (test_body): add a test for the above change.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@33014 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
backport r33013 from trunk.
iseq.c (iseq_s_disasm): fix a bug that may cause SEGV.
test/ruby/test_method.rb (test_body): add a test for the above change.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@33014 b2dd03c8-39d4-4d8f-98ff-823fe69b080e