Segmentation Fault when running all specs with RSpec

[georgeu2000]

The following causes a segmentation fault, but only when simplecov is in Gemfile:

c.run_all_when_everything_filtered = true

When set to false, there is no seg fault.

More RSpec config:

RSpec.configure do |c|
  c.filter_run :focus => true
  c.filter_run_excluding :slow  => true
  c.run_all_when_everything_filtered = true
  c.include FactoryGirl::Syntax::Methods
end

simplecov (0.7.1)
guard (1.6.2)
guard-rspec (2.4.1)
Ruby 1.9.3p125 and 1.9.3p374

ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-darwin11.4.2]

* Loaded features
0 enumerator.so
1 /Users/george/.rbenv/versions/1.9.3-p125/lib/ruby/1.9.1/x86_64-darwin11.4.2/enc/encdb.bundle
....
525 /Users/george/.rbenv/versions/1.9.3-p125/gemsets/ruby-bitcoin/gems/rspec-expectations-2.12.1/lib/rspec/expectations/differ.rb
526 /Users/george/.rbenv/versions/1.9.3-p125/gemsets/ruby-bitcoin/gems/rspec-expectations-2.12.1/lib/rspec/expectations.rb

[colszowka]

You're 7 patch-level releases of Ruby 1.9.3 behind - could you please update to the latest 1.9.3-p392 and try again?

[georgeu2000]

I saw the same symptom on 1.9.3p374, but I no longer think it is coming from simplecov.

It seems to happen when I change the Gemfile. Not only with simplecov. Have never seen this before...perhaps because I am working with threads.

[colszowka]

Alright, good luck figuring your problems out then! Maybe you can separate your specs into unit tests that test your individual components thread-less and a separate integration-style suite that puts it all together - I think that'd make it easier for you to find bugs in your threading implementation. I'd also strongly recommend checking out the celluloid gem when working with threads, it makes structuring and maintaining things a lot easier through things like supervision groups, though it surely is not applicable to everything. It's what the popular sidekiq gem uses under the hood, too.

[garysweaver]

Getting same problem, also using rspec 2.12.0, Rails 3.2.x, OS X 10.7.5:

(erb):35: [BUG] Segmentation fault
ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin11.4.2]

-- Control frame information -----------------------------------------------
c:0024 p:---- s:0087 b:0087 l:000086 d:000086 CFUNC  :round
c:0023 p:0132 s:0083 b:0082 l:0012e0 d:000081 BLOCK  (erb):35
c:0022 p:---- s:0079 b:0079 l:000078 d:000078 FINISH
c:0021 p:---- s:0077 b:0077 l:000076 d:000076 CFUNC  :each
c:0020 p:0501 s:0074 b:0074 l:0012e0 d:001280 EVAL   (erb):32
c:0019 p:---- s:0071 b:0071 l:000070 d:000070 FINISH
c:0018 p:---- s:0069 b:0069 l:000068 d:000068 CFUNC  :eval
c:0017 p:0062 s:0062 b:0062 l:000061 d:000061 METHOD /path/to/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/erb.rb:838
c:0016 p:0052 s:0058 b:0058 l:0012e0 d:0012e0 METHOD /path/to/gems/simplecov-html-0.7.1/lib/simplecov-html.rb:58
c:0015 p:0387 s:0052 b:0051 l:001e50 d:001e80 EVAL   (erb):21
c:0014 p:---- s:0048 b:0048 l:000047 d:000047 FINISH
c:0013 p:---- s:0046 b:0046 l:000045 d:000045 CFUNC  :eval
c:0012 p:0062 s:0039 b:0039 l:000038 d:000038 METHOD /path/to/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/erb.rb:838
c:0011 p:0027 s:0035 b:0034 l:001e50 d:000050 BLOCK  /path/to/gems/simplecov-html-0.7.1/lib/simplecov-html.rb:19
c:0010 p:---- s:0031 b:0031 l:000030 d:000030 FINISH
c:0009 p:---- s:0029 b:0029 l:000028 d:000028 CFUNC  :open
c:0008 p:0089 s:0024 b:0024 l:001e50 d:001e50 METHOD /path/to/gems/simplecov-html-0.7.1/lib/simplecov-html.rb:18
c:0007 p:0030 s:0020 b:0020 l:000019 d:000019 METHOD /path/to/gems/simplecov-0.7.1/lib/simplecov/result.rb:91
c:0006 p:0021 s:0017 b:0017 l:001dd0 d:000016 BLOCK  /path/to/gems/simplecov-0.7.1/lib/simplecov/configuration.rb:133
c:0005 p:---- s:0015 b:0015 l:000014 d:000014 FINISH
c:0004 p:---- s:0013 b:0013 l:000012 d:000012 CFUNC  :call
c:0003 p:0070 s:0010 b:0010 l:000760 d:000009 BLOCK  /path/to/gems/simplecov-0.7.1/lib/simplecov/defaults.rb:52
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:001828 d:001828 TOP   

-- Ruby level backtrace information ----------------------------------------
/path/to/gems/simplecov-0.7.1/lib/simplecov/defaults.rb:52:in `block in <top (required)>'
/path/to/gems/simplecov-0.7.1/lib/simplecov/defaults.rb:52:in `call'
/path/to/gems/simplecov-0.7.1/lib/simplecov/configuration.rb:133:in `block in at_exit'
/path/to/gems/simplecov-0.7.1/lib/simplecov/result.rb:91:in `format!'
/path/to/gems/simplecov-html-0.7.1/lib/simplecov-html.rb:18:in `format'
/path/to/gems/simplecov-html-0.7.1/lib/simplecov-html.rb:18:in `open'
/path/to/gems/simplecov-html-0.7.1/lib/simplecov-html.rb:19:in `block in format'
/path/to/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/erb.rb:838:in `result'
/path/to/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/erb.rb:838:in `eval'
(erb):21:in `block in format'
/path/to/gems/simplecov-html-0.7.1/lib/simplecov-html.rb:58:in `formatted_file_list'
/path/to/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/erb.rb:838:in `result'
/path/to/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/erb.rb:838:in `eval'
(erb):32:in `formatted_file_list'
(erb):32:in `each'
(erb):35:in `block in formatted_file_list'
(erb):35:in `round'

Fails when a require was pointing at something that was missing and immediately after reporting test results after running a set of tests. Fails every time.

Simplecov works great for coverage in a gem I test with rspec, though, so I don't think is rspec. Trying to track down what is causing the problem.

[garysweaver]

Now works great! Removed ruby-prof 0.11.2 (which was probably the problem) and switched to requiring/starting in initializer per this comment.

[alexperto]

guys, do you have any update about this? I have the same problem in jenkins

[MaicolBen]

I have the same issue on ruby 2.4.2 and simplecov 0.13, 0.14 and 0.15

[PragTob]

Most likely it's a ruby bug. We don't usually segfault but the Coverage library we use underneath.

You can check that out by just doing:

require "coverage"
Coverage.start
# your test suite
p Coverage.result

http://ruby-doc.org/stdlib-2.3.0/libdoc/coverage/rdoc/Coverage.html

Without a sample application there's probably also not much that ruby core can do.