[ruby-core:66153] [ruby-trunk - Bug #10486] Crash running rspec let(:foo){undefinedhash['key']}

Issue #10486 has been updated by Nik Gregory.

File ruby-10486.tar added
File 10486-rvm-2.1.2.log added
File ruby_2014-11-08-234055_nik.crash added

I have a somewhat inconsistent steps to reproduce
1) in my existing terminal, I created the code that is in the attached tarball 

2)
tar xzvf ruby-10486.tar
cd rubybug
bundle install --path=vendor
bundle exec rake doc
and I get the crash above

in a different terminal in SAME directory
bundle exec rake doc
produces

~~~
 bundle exec rake doc
/Users/nik/.rvm/rubies/ruby-2.1.4/bin/ruby -I/Users/nik/sandbox/engineering/gardener/rubybug/vendor/ruby/2.1.0/gems/rspec-core-3.1.7/lib:/Users/nik/sandbox/engineering/gardener/rubybug/vendor/ruby/2.1.0/gems/rspec-support-3.1.2/lib /Users/nik/sandbox/engineering/gardener/rubybug/vendor/ruby/2.1.0/gems/rspec-core-3.1.7/exe/rspec --pattern spec/\*_spec.rb --format RspecApiDocumentation::ApiFormatter
Generating API Docs
  Site
  GET api/v1/sites/:site
----> Working...
    ! Get details about a specific site (FAILED)

Failures:

  1) Site GET api/v1/sites/:site Get details about a specific site
     Failure/Error: Unable to find matching line from backtrace
     SystemStackError:
       stack level too deep
     # /Users/nik/sandbox/engineering/gardener/rubybug/vendor/ruby/2.1.0/gems/rspec-core-3.1.7/lib/rspec/core/memoized_helpers.rb:242
     # 
     #   Showing full backtrace because every line was filtered out.
     #   See docs for RSpec::Configuration#backtrace_exclusion_patterns and
     #   RSpec::Configuration#backtrace_inclusion_patterns for more information.

Finished in 0.16372 seconds (files took 0.41338 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/test_spec.rb:18 # Site GET api/v1/sites/:site Get details about a specific site
/Users/nik/.rvm/rubies/ruby-2.1.4/bin/ruby -I/Users/nik/sandbox/engineering/gardener/rubybug/vendor/ruby/2.1.0/gems/rspec-core-3.1.7/lib:/Users/nik/sandbox/engineering/gardener/rubybug/vendor/ruby/2.1.0/gems/rspec-support-3.1.2/lib /Users/nik/sandbox/engineering/gardener/rubybug/vendor/ruby/2.1.0/gems/rspec-core-3.1.7/exe/rspec --pattern spec/\*_spec.rb --format RspecApiDocumentation::ApiFormatter failed

~~~

3) if I rvm use 2.1.2 I get a different stack trace but still a crash
see the 10486-rvm-2.1.2.log attached  
ruby -v
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-darwin13.0]


----------------------------------------
Bug #10486: Crash running rspec let(:foo){undefinedhash['key']}
https://bugs.ruby-lang.org/issues/10486#change-49855

* Author: Nik Gregory
* Status: Feedback
* Priority: Normal
* Assignee: 
* Category: 
* Target version: current: 2.2.0
* ruby -v: ruby 2.1.4p265 (2014-10-27 revision 48166) [x86_64-darwin14.0]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
----------------------------------------
    ! Get details about a specific site (FAILED)


---Files--------------------------------
ruby_2014-11-07-160619_nik.crash (17.8 KB)
bug-10486.log (56 KB)
ruby-10486.tar (15 KB)
10486-rvm-2.1.2.log (39.1 KB)
ruby_2014-11-08-234055_nik.crash (13.8 KB)


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