Kernel.eval with yield behaves differently than MRI 1.8.6/1.8.7, causes some
libraries failures with JRuby
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Key: JRUBY-2605
URL: http://jira.codehaus.org/browse/JRUBY-2605
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.1.2
Environment: Latest JRuby 1.1.2
Reporter: Vladimir Sizikov
Priority: Critical
Attachments: eval-specs.rb
Kernel.eval in JRuby have the following issues that actually cause some
libraries (like Sinatra) to fail with JRuby:
1. ruby -ve "p eval('yield') { 'vvs' }"
ruby 1.8.6 (2007-09-24 patchlevel 111) [i486-linux]
"vvs"
jruby -ve "p eval('yield') { 'vvs' }"
ruby 1.8.6 (2008-06-02 rev 6586) [i386-jruby1.1.2]
: yield called out of block (LocalJumpError)
2.
{noformat}
def render
eval("yield", binding)
end
p render { "vvs" }
{noformat}
Again, JRuby raises LocalJumpError here.
I'm attaching the specs file (to be integrated into RubySpecs).
Here's the output:
{noformat}
mspec -f s -t /opt/ruby1.8-stable/bin/ruby eval-render.rb
Kernel.eval
- yields to the provided block when evaling 'yield'
- does not yield to the provided block when evaling 'yield' when scope argument
is present
- yields to the block captured by binding
- does not pass the block to the method being eval'ed
Finished in 0.002724 seconds
>mspec -f s -t j eval-render.rb
Kernel.eval
- yields to the provided block when evaling 'yield' (ERROR - 1)
- does not yield to the provided block when evaling 'yield' when scope argument
is present
- yields to the block captured by binding (ERROR - 2)
- does not pass the block to the method being eval'ed
1)
Kernel.eval yields to the provided block when evaling 'yield' ERROR
LocalJumpError: yield called out of block
2)
Kernel.eval yields to the block captured by binding ERROR
LocalJumpError: yield called out of block
{noformat}
See also JRUBY-2599 for the example where this problem is visible.
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