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List:       ruby-core
Subject:    [ruby-core:76608] [Ruby trunk Bug#12614] Segmentation Fault on Ruby 2.3.1
From:       nagachika00 () gmail ! com
Date:       2016-07-29 6:29:44
Message-ID: redmine.journal-59829.20160729062944.bfe127aa5f530ad0 () ruby-lang ! org
[Download RAW message or body]

Issue #12614 has been updated by Tomoyuki Chikanaga.

Backport changed from 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN to 2.1: UNKNOWN, 2.2: \
UNKNOWN, 2.3: REQUIRED

----------------------------------------
Bug #12614: Segmentation Fault on Ruby 2.3.1
https://bugs.ruby-lang.org/issues/12614#change-59829

* Author: Matthew Wear
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-linux]
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: REQUIRED
----------------------------------------
### Description

We have an extensive test matrix that tests many versions of Rails over many versions \
of Ruby. We notice frequent segfaults when running our Rails 3.1 suite with Ruby \
2.3.1p112. We run the same suite with Ruby 1.8 - Ruby 2.2 without issues. It appears \
that our test suite is exposing a subtle bug in Ruby that I suspect that it is \
related to garbage collection. The segfault does not occur everytime the test suite \
runs, but if I run the suite in a bash for loop for 100 iterations I usually see 5-10 \
segfaults. If I turn off garbage collection during the test cases the segfault does \
not occur over 100 iterations of the test suite.

### To Reproduce

I tried, but was unable to come up with a minimal reproduction case. Our code and \
test suite are publically available and I'll list the steps you can follow to \
reproduce the issue with some additional setup. 

1. Clone the newrelic rpm github repo from: https://github.com/newrelic/rpm
2. git checkout 3.16.0.318
3. bundle install
4. run the test suite a single time (you probably won't see a segfault): bundle exec \
rake test:multiverse[rails,env=6] 5. run the test suite in a bash for loop for 100 \
iterations: for i in \`seq 1 100\`; do bundle exec rake test:multiverse[rails,env=6]; \
done

### Segfault Output

[ruby_2_3_segfault.txt](../../attachments/6070/ruby_2_3_segfault.txt)

### Possibly Related:

https://bugs.ruby-lang.org/issues/11846


---Files--------------------------------
ruby_2_3_segfault.txt (160 KB)


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