# Segfault in timer.rb **URL:** \ **Category:** ruby-talk\ **Created:** [11 January 2005 17:51 UTC](https://rubytalk.org/t/segfault-in-timer-rb/15734 "2005-01-11T17:51:19Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Erlend\_Oye](https://avatars.discourse-cdn.com/v4/letter/e/4491bb/32.png) [@Erlend\_Oye](https://rubytalk.org/u/Erlend_Oye)\ **Post date:** [11 January 2005 17:51 UTC](https://rubytalk.org/t/segfault-in-timer-rb/15734/1 "2005-01-11T17:51:19Z")
Hi Florian, \> Florian Gross wrote: \>\> Erlend Oye wrote: \>\> /usr/local/lib/ruby/1.8/timeout.rb:40: [BUG] rb\_gc\_mark() called for \>\> broken object \>\> ruby 1.8.2 (2005-01-10) [i386-cygwin] \>\> [...] \>\> zsh: 22780 abort (core dumped) ruby scrape\_server.rb \>\> -------- \>\> /usr/local/lib/ruby/1.8/timeout.rb:40: [BUG] rb\_gc\_mark(): unknown data \>\> type 0x2e(0x1037d178) non object \>\> ruby 1.8.2 (2005-01-10) [i386-cygwin] \> \>Any other libraries that it's using? YAML used to do something similar. Here are the various requires and includes (not in order) require 'cgi' require 'net/http' require 'rexml/document' require 'uri/http' include WEBrick require 'webrick' I believe timeout is being used by Webrick internally and not RSSScraper directly. RSSScraper is at [http://rssscraper.rubyforge.org](http://rssscraper.rubyforge.org) Thanks Erlend Oye ---
**Author:** ![Erlend\_Oye](https://avatars.discourse-cdn.com/v4/letter/e/4491bb/32.png) [@Erlend\_Oye](https://rubytalk.org/u/Erlend_Oye)\ **Post date:** [13 January 2005 06:34 UTC](https://rubytalk.org/t/segfault-in-timer-rb/15734/2 "2005-01-13T06:34:36Z")
Erlend Oye wrote: > Hi Florian, > > \> Florian Gross wrote: > \>\> Erlend Oye wrote: > \>\> /usr/local/lib/ruby/1.8/timeout.rb:40: [BUG] rb\_gc\_mark() called for > \>\> broken object > \>\> ruby 1.8.2 (2005-01-10) [i386-cygwin] > > \>\> [...] > \>\> zsh: 22780 abort (core dumped) ruby scrape\_server.rb > \>\> -------- > \>\> /usr/local/lib/ruby/1.8/timeout.rb:40: [BUG] rb\_gc\_mark(): unknown data > \>\> type 0x2e(0x1037d178) non object > \>\> ruby 1.8.2 (2005-01-10) [i386-cygwin] > \> > > \>Any other libraries that it's using? YAML used to do something similar. > > Here are the various requires and includes (not in order) > > require 'cgi' > require 'net/http' > require 'rexml/document' > require 'uri/http' > include WEBrick > require 'webrick' > > I believe timeout is being used by Webrick internally and not RSSScraper > directly. > > RSSScraper is at > > [http://rssscraper.rubyforge.org](http://rssscraper.rubyforge.org) > > Thanks > Erlend Oye All of these segfaults seemed to be happening at Thread.start statements. This hinted some trouble with thread support so I recompiled using --disable-pthread and the troubles have disappeared. I wonder if this is an issue from Ruby's side or on Cygwin's side. I am noticing other segfaults being reported on other platforms (e.g linux) due to pthreads support also. Thanks Erlend Oye ---
**Author:** ![Erlend\_Oye](https://avatars.discourse-cdn.com/v4/letter/e/4491bb/32.png) [@Erlend\_Oye](https://rubytalk.org/u/Erlend_Oye)\ **Post date:** [13 January 2005 16:18 UTC](https://rubytalk.org/t/segfault-in-timer-rb/15734/3 "2005-01-13T16:18:29Z")
Erlend Oye wrote: > Erlend Oye wrote: > > > Hi Florian, > > > > > Florian Gross wrote: > > > > > > > Erlend Oye wrote: > > > > /usr/local/lib/ruby/1.8/timeout.rb:40: [BUG] rb\_gc\_mark() called for > > > > broken object > > > > ruby 1.8.2 (2005-01-10) [i386-cygwin] > > > > > > ## […] zsh: 22780 abort (core dumped) ruby scrape\_server.rb > > > > > > > > /usr/local/lib/ruby/1.8/timeout.rb:40: [BUG] rb\_gc\_mark(): unknown > > > > data > > > > type 0x2e(0x1037d178) non object > > > > ruby 1.8.2 (2005-01-10) [i386-cygwin] > > > > > Any other libraries that it’s using? YAML used to do something similar. > > > > Here are the various requires and includes (not in order) > > > > require ‘cgi’ > > require ‘net/http’ > > require ‘rexml/document’ > > require ‘uri/http’ > > include WEBrick > > require ‘webrick’ > > > > I believe timeout is being used by Webrick internally and not RSSScraper > > directly. > > > > RSSScraper is at > > > > [http://rssscraper.rubyforge.org](http://rssscraper.rubyforge.org) > > > > Thanks > > Erlend Oye > > All of these segfaults seemed to be happening at > > Thread.start > > statements. This hinted some trouble with thread support so I > recompiled using > > –disable-pthread > > and the troubles have disappeared. I wonder if this is an issue from > Ruby’s side > or on Cygwin’s side. I am noticing other segfaults being reported on > other platforms > (e.g linux) due to pthreads support also. > > Thanks > Erlend Oye (Cross posting to core) Spoke too soon. The segfault still happens at Thread.start -Erlend Oye ---
**Author:** ![Seg\_Fault](https://avatars.discourse-cdn.com/v4/letter/s/8c91f0/32.png) [@Seg\_Fault](https://rubytalk.org/u/Seg_Fault)\ **Post date:** [13 January 2005 18:08 UTC](https://rubytalk.org/t/segfault-in-timer-rb/15734/4 "2005-01-13T18:08:45Z")
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**Author:** ![Erlend\_Oye](https://avatars.discourse-cdn.com/v4/letter/e/4491bb/32.png) [@Erlend\_Oye](https://rubytalk.org/u/Erlend_Oye)\ **Post date:** [15 January 2005 17:51 UTC](https://rubytalk.org/t/segfault-in-timer-rb/15734/5 "2005-01-15T17:51:57Z")
> \> and previously without the CFLAGS and > \> --disable-pthread > \> but got the same segfaults. It always happens in > \> Thread.start 😕 > > Well, try to write a small script to reproduce the problem. Personnally I > don't have access to a cygwin system, and ruby just work fine. > > Guy Decoux Here's a sample script, which is basically the condensed version of what RSSScraper does > **···** > > --------------------------------- > #!/usr/local/bin/ruby > require 'webrick' > require 'open-uri' > include WEBrick > > class SegfaultServlet \< HTTPServlet::AbstractServlet >   def do\_GET(req, res) >     url = req.path.to\_s[/.\*?\/(.+)/, 1] >     res['Content-Type'] = "text/html" >     res['Url-You-Sent'] = "#{url}" >     STDERR.puts "http://#{url}" >     res.body = open("http://#{url}").read >   end > end > s= HTTPServer.new(:Port =\> 5363) > s.mount("/", SegfaultServlet) > trap("INT"){ s.shutdown } > s.start > ------------------------------- > > Run it and use it using some wgets > > wget '[http://localhost:5363/slashdot.org'](http://localhost:5363/slashdot.org'); & ; \ >   sleep 1 ; \ >   wget '[http://localhost:5363/slashdot.org'](http://localhost:5363/slashdot.org'); & ; \ >   sleep 1 ; \ >   wget '[http://localhost:5363/www.lambda-the-ultimate.org'](http://localhost:5363/www.lambda-the-ultimate.org'); & ; \ >   sleep 1 ; \ >   wget '[http://localhost:5363/www.ruby-lang.org'](http://localhost:5363/www.ruby-lang.org'); > > and sure enough it segfaults, here's another backtrace > > % gdb ruby > GNU gdb 6.3.50\_2004-12-28-cvs (cygwin-special) > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "i686-pc-cygwin"... > (gdb) run test.rb > Starting program: /usr/local/bin/ruby.exe test.rb > > Program received signal SIGSEGV, Segmentation fault. > 0x10023952 in cygruby19!Init\_load () from /usr/local/bin/cygruby19.dll > (gdb) bt > #0 0x10023952 in cygruby19!Init\_load () from /usr/local/bin/cygruby19.dll > #1 0x10023984 in cygruby19!Init\_load () from /usr/local/bin/cygruby19.dll > #2 0x10033d76 in rb\_gc\_force\_recycle () from /usr/local/bin/cygruby19.dll > #3 0x100338c4 in rb\_gc\_mark () from /usr/local/bin/cygruby19.dll > #4 0x10034130 in rb\_gc\_mark\_frame () from /usr/local/bin/cygruby19.dll > #5 0x100327c8 in ruby\_xmalloc () from /usr/local/bin/cygruby19.dll > #6 0x1002383d in cygruby19!Init\_load () from /usr/local/bin/cygruby19.dll > #7 0x1001f8b2 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #8 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #9 0x10019a5f in rb\_alias () from /usr/local/bin/cygruby19.dll > #10 0x10024fe5 in rb\_proc\_arity () from /usr/local/bin/cygruby19.dll > #11 0x100187df in rb\_alias () from /usr/local/bin/cygruby19.dll > #12 0x1001f7b1 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #13 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #14 0x10019ce2 in rb\_alias () from /usr/local/bin/cygruby19.dll > #15 0x100189bb in rb\_alias () from /usr/local/bin/cygruby19.dll > #16 0x10018e82 in rb\_alias () from /usr/local/bin/cygruby19.dll > #17 0x1001f7b1 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #18 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #19 0x10019ce2 in rb\_alias () from /usr/local/bin/cygruby19.dll > #20 0x1001f7b1 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #21 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #22 0x10019ce2 in rb\_alias () from /usr/local/bin/cygruby19.dll > #23 0x1001a975 in rb\_alias () from /usr/local/bin/cygruby19.dll > #24 0x100185ad in rb\_alias () from /usr/local/bin/cygruby19.dll > #25 0x1001f7b1 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #26 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #27 0x10019ce2 in rb\_alias () from /usr/local/bin/cygruby19.dll > #28 0x10017e32 in rb\_alias () from /usr/local/bin/cygruby19.dll > #29 0x1001f7b1 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #30 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #31 0x10019a5f in rb\_alias () from /usr/local/bin/cygruby19.dll > #32 0x10018e82 in rb\_alias () from /usr/local/bin/cygruby19.dll > #33 0x10019083 in rb\_alias () from /usr/local/bin/cygruby19.dll > #34 0x10018598 in rb\_alias () from /usr/local/bin/cygruby19.dll > #35 0x1001f7b1 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #36 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #37 0x10019ce2 in rb\_alias () from /usr/local/bin/cygruby19.dll > #38 0x10018e82 in rb\_alias () from /usr/local/bin/cygruby19.dll > #39 0x10019083 in rb\_alias () from /usr/local/bin/cygruby19.dll > #40 0x1001d623 in rb\_iterator\_p () from /usr/local/bin/cygruby19.dll > #41 0x1002a333 in rb\_thread\_create () from /usr/local/bin/cygruby19.dll > #42 0x1002a041 in rb\_thread\_group () from /usr/local/bin/cygruby19.dll > #43 0x1002a4a6 in rb\_thread\_create () from /usr/local/bin/cygruby19.dll > #44 0x1002c2cb in rb\_throw () from /usr/local/bin/cygruby19.dll > #45 0x1001f190 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #46 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #47 0x10019a5f in rb\_alias () from /usr/local/bin/cygruby19.dll > #48 0x100189bb in rb\_alias () from /usr/local/bin/cygruby19.dll > #49 0x1001f7b1 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #50 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #51 0x10019ce2 in rb\_alias () from /usr/local/bin/cygruby19.dll > #52 0x10024eaa in rb\_proc\_arity () from /usr/local/bin/cygruby19.dll > #53 0x100187df in rb\_alias () from /usr/local/bin/cygruby19.dll > #54 0x1001a9e0 in rb\_alias () from /usr/local/bin/cygruby19.dll > #55 0x1001d623 in rb\_iterator\_p () from /usr/local/bin/cygruby19.dll > #56 0x1001da03 in rb\_yield () from /usr/local/bin/cygruby19.dll > #57 0x10002aa6 in rb\_ary\_each () from /usr/local/bin/cygruby19.dll > #58 0x1002c2ff in rb\_throw () from /usr/local/bin/cygruby19.dll > #59 0x1001f190 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #60 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #61 0x10019a5f in rb\_alias () from /usr/local/bin/cygruby19.dll > #62 0x100189bb in rb\_alias () from /usr/local/bin/cygruby19.dll > #63 0x10018e82 in rb\_alias () from /usr/local/bin/cygruby19.dll > #64 0x10018598 in rb\_alias () from /usr/local/bin/cygruby19.dll > #65 0x1001d623 in rb\_iterator\_p () from /usr/local/bin/cygruby19.dll > #66 0x10018ddb in rb\_alias () from /usr/local/bin/cygruby19.dll > ---Type \ to continue, or q \ to quit--- > #67 0x1001f7b1 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #68 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #69 0x10019a5f in rb\_alias () from /usr/local/bin/cygruby19.dll > #70 0x100189bb in rb\_alias () from /usr/local/bin/cygruby19.dll > #71 0x1001f7b1 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #72 0x1001fcc9 in rb\_with\_disable\_interrupt () from /usr/local/bin/cygruby19.dll > #73 0x10019a5f in rb\_alias () from /usr/local/bin/cygruby19.dll > #74 0x100155a3 in ruby\_init () from /usr/local/bin/cygruby19.dll > #75 0x10015b34 in ruby\_cleanup () from /usr/local/bin/cygruby19.dll > #76 0x10015b6b in ruby\_exec () from /usr/local/bin/cygruby19.dll > #77 0x10015ba6 in ruby\_run () from /usr/local/bin/cygruby19.dll > #78 0x0040109a in main (argc=2, argv=0x100f2fc8, envp=0x100f00a8) at main.c:38 > (gdb) > > -Seg Fault/Erlend Oye/Cygwin Supported? ---
**Author:** ![ts1](https://avatars.discourse-cdn.com/v4/letter/t/a8b319/32.png) [@ts1](https://rubytalk.org/u/ts1)\ **Post date:** [13 January 2005 18:32 UTC](https://rubytalk.org/t/segfault-in-timer-rb/15734/6 "2005-01-13T18:32:41Z")
With such a name, ruby can only segfault and it do this just to be pleasant with you 🙂 > Here's a gdb stacktrace Well, probably it was not compiled with the right option. With a correct backtrace, probably you'll not see such calls > /usr/local/bin/cygruby19.dll > #40 0x10019a5f in rb\_alias () from > /usr/local/bin/cygruby19.dll > #41 0x100189bb in rb\_alias () from > /usr/local/bin/cygruby19.dll > #42 0x1001a975 in rb\_alias () from > /usr/local/bin/cygruby19.dll > #43 0x10019083 in rb\_alias () from > /usr/local/bin/cygruby19.dll this is probably rb\_call() rather than rb\_alias() : this means that gdb has problem to give the correct backtrace Guy Decoux ---
**Author:** ![ts1](https://avatars.discourse-cdn.com/v4/letter/t/a8b319/32.png) [@ts1](https://rubytalk.org/u/ts1)\ **Post date:** [16 January 2005 11:45 UTC](https://rubytalk.org/t/segfault-in-timer-rb/15734/7 "2005-01-16T11:45:41Z")
> Here's a sample script, which is basically the condensed version of what > RSSScraper does I was unable to reproduce the problem (linux, openbsd, solaris), someone with cygwin can try this example ? Guy Decoux