Bug #9167: Segmentation fault in cleanup

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 1.9.3p448 (2013-06-27 revision 41675) [i386-ruby 1.9.3p448 (2013-06-27 revision 41675) [i386-freebsd9]freebsd9]
• Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN

[BertramScharpf (Bertram Scharpf)]

I don't know whether it is the interpreters fault or mine.
This is what I do:

• Subclassing StandardError in C
• Encapsulating some data into it using Data_Make_Struct
• Raising this exception
• Not catching it by "rescue"

If I catch it by "rescue", everything is fine. If I don't, the
finalizer crashes with a segmentation fault.

I made a gem out of it containting the full example and a little
bit more description. See the attached file.

This gem contains a build dependency, so you probably prefer to
untar it and compile it on the command line by "cc". This is what
I have to do here:

$ cc -c -DHAVE_HEADER_RUBY_RUBY_H -I/usr/local/include/ruby-1.9 -I/usr/local/include/ruby-1.9/i386-freebsd9 -fPIC -o dataerr.o dataerr.c
$ cc --shared -o dataerr.so dataerr.o
$ ruby -r ./dataerr -e 'begin ; raise_it! ; rescue ; end'
-> Return code 0
$ ruby -r ./dataerr -e 'raise_it!'
-> Segmentation fault

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Feedback

Fundamentally, subclasses of Exception are not expected other than T_OBJECT.
And I couldn't reproduce it with the trunk, can't you show your backtrace?

[nobu (Nobuyoshi Nakada)]

• Status changed from Feedback to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r43930.
Bertram, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

eval.c: determine exit status and signal before finalization

• eval.c (ruby_cleanup): determine exit status and signal to terminate
  before finalization, to get rid of access destroyed T_DATA execption
  object. [ruby-core:58643] [Bug #9167]

[BertramScharpf (Bertram Scharpf)]

nobu (Nobuyoshi Nakada) wrote:

Bertram, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.

Thank you for fixing it.
I'll keep my eyes open.