Actions
Bug #14179
closedForwardable Segmentation fault ruby 2.2.8p477 (2017-09-14 revision 59906)
Status:
Closed
Assignee:
-
Target version:
-
ruby -v:
ruby 2.2.8p477 (2017-09-14 revision 59906)
Description
Hello,
Delegating backtrace
causes a segmentation fault on ruby 2.2.8.
Seems to be related to this change: https://github.com/ruby/ruby/commit/a14ba6e3d58d6f63f47c0549f60306c4989478ba
Looking at that change, seems like the $@
call on line 207 would cause an infinite loop (assuming $@
would execute something similar $!.backtrace
, but I'm not sure how $@
is implemented).
Example:
irb(main):052:0> class WrappedException < StandardError
irb(main):053:1> extend Forwardable
irb(main):054:1>
irb(main):055:1* def_delegators :@err, :backtrace
irb(main):056:1>
irb(main):057:1* def initialize(err)
irb(main):058:2> @err = err
irb(main):059:2> end
irb(main):060:1> end
=> :initialize
irb(main):061:0>
irb(main):062:0* begin
irb(main):063:1* raise WrappedException, StandardError.new('test')
irb(main):064:1> rescue => e
irb(main):065:1> e.backtrace
irb(main):066:1> end
Segmentation fault
irb(main):031:0> class WrappedException < StandardError
irb(main):032:1> extend Forwardable
irb(main):033:1>
irb(main):034:1* def_delegators :@err, :backtrace
irb(main):035:1>
irb(main):036:1* def initialize(err)
irb(main):037:2> @err = err
irb(main):038:2> end
irb(main):039:1> end
=> :initialize
irb(main):040:0>
irb(main):041:0* begin
irb(main):042:1* raise WrappedException, StandardError.new('test')
irb(main):043:1> rescue => e
irb(main):044:1> e.backtrace
irb(main):045:1> end
RuntimeError: can't modify frozen SystemStackError
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
... 5481 levels...
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from /opt/.rbenv/versions/2.2.8/lib/ruby/2.2.0/forwardable.rb:207:in `backtrace'
from (irb):44:in `rescue in irb_binding'
from (irb):41
from /opt/.rbenv/versions/2.2.8/bin/irb:11:in `<main>'
irb(main):046:0>
Actions
Like0
Like0Like0Like0Like0Like0