Bug 478832
| Summary: | Xchat ruby script crashes xchat with ruby*-1.8.6.287-2.fc9.i386 | ||||||||
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| Product: | [Fedora] Fedora | Reporter: | Roland Pallai <dap78> | ||||||
| Component: | ruby | Assignee: | Akira TAGOH <tagoh> | ||||||
| Status: | CLOSED NOTABUG | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | low | ||||||||
| Version: | 9 | CC: | tagoh | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | i386 | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2009-01-06 07:12:18 UTC | Type: | --- | ||||||
| Regression: | --- | Mount Type: | --- | ||||||
| Documentation: | --- | CRM: | |||||||
| Verified Versions: | Category: | --- | |||||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||||
| Embargoed: | |||||||||
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that might be a kind of side-effects from changes between 1.8.6.114 and 1.8.6.287 which possibly may spends more system stacks. There are nothing I can do in ruby package since your system configuration also affects this. what I can suggest you is: 1. consider to re-implement your script to reduce spending stacks by the recursive calls 2. change your resource configuration with ulimit to increase the process stack size. Created attachment 328278 [details]
simpler version of my xchat script
Now I made my script more simpler, only about 30 lines of code, and crashes too. How could I write simpler than this?!
Xchat stack usage is minimal and never grows:
[dap@dh .xchat2]$ grep VmStk /proc/`pidof xchat`/status
VmStk: 96 kB
[dap@dh .xchat2]$ ulimit -s
10240
I tried with a bigger stack:
[dap@dh ~]$ ulimit -s 20480
[dap@dh ~]$ ulimit -s
20480
[dap@dh ~]$ time xchat
(eval):171: stack level too deep (SystemStackError)
(eval):171: [BUG] Segmentation fault
ruby 1.8.6 (2008-08-11) [i386-linux]
Aborted
real 1m55.442s
user 0m4.264s
sys 0m1.137s
With the original stack size:
real 2m37.588s
user 0m4.539s
sys 0m1.124s
Runtime vary between 1-3 minutes, but bigger stack doesn't mean longer runtime.
I can't believe that this is not a bug in ruby or xchat-ruby (but the later's version didn't changed with the upgrade).
then try to gather more information like ruby's backtrace. you can see how it's deeply stacked. |
Created attachment 328199 [details] My Xchat-ruby script Description of problem: My Xchat ruby script crashes Xchat in every 8-10 minutes after I upgraded from ruby*-1.8.6.114-1.fc9 to ruby*-1.8.6.287-2.fc9. (ruby* = ruby, ruby-irb, ruby-libs, ruby-rdoc, ruby-ri) The script uses hook_timer(), I guess this triggers the bug. Everything works fine after I downgraded to ruby*-1.8.6.114-1.fc9. The script serves me for a long time, I used it on Fedora 7/8 before without problems. Version-Release number of selected component (if applicable): ruby*-1.8.6.287-2.fc9 xchat-ruby-1.2-6.fc9 xchat-2.8.4-16.fc9 How reproducible: Use my script with latest Fedora 9. Steps to Reproduce: 1. Install Fedora 9 with latest upgrades 2. Install Xchat, Xchat-ruby 3. Copy my script into ~/.xchat2/ 4. Start Xchat from a terminal and wait 8-10 minutes Actual results: [dap@dh ~]$ xchat (eval):171: stack level too deep (SystemStackError) (eval):171: [BUG] Segmentation fault ruby 1.8.6 (2008-08-11) [i386-linux] Aborted [dap@dh ~]$ Expected results: Additional info: