Named captures cause crash when there is no match
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Key: JRUBY-5863
URL: http://jira.codehaus.org/browse/JRUBY-5863
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules, Ruby 1.9.2
Affects Versions: JRuby 1.6.1
Environment: Arch Linux, x86_64, 2.6.38
Reporter: Gabor Szarka
The below snippet explains everything.
[gabor@gabor-desktop-arch ~]$ rvm use jruby
Using /home/gabor/.rvm/gems/jruby-1.6.1
[gabor@gabor-desktop-arch ~]$ rvm --version
rvm 1.6.13 by Wayne E. Seguin (wayneeseg...@gmail.com)
[https://rvm.beginrescueend.com/]
[gabor@gabor-desktop-arch ~]$ jruby -v
jruby 1.6.1 (ruby-1.9.2-p136) (2011-04-12 85838f6) (OpenJDK 64-Bit Server VM
1.6.0_22) [linux-amd64-java]
[gabor@gabor-desktop-arch ~]$ ruby
/(?<a>.+)/ =~ ""
RuntimeHelpers.java:2241:in `updateScopeWithCaptures':
java.lang.ClassCastException: org.jruby.RubyNil cannot be cast to
org.jruby.RubyMatchData
from RuntimeHelpers.java:2228:in `match2AndUpdateScope'
from -:1:in `__file__'
from -:-1:in `load'
from Ruby.java:671:in `runScript'
from Ruby.java:575:in `runNormally'
from Ruby.java:424:in `runFromMain'
from Main.java:278:in `doRunFromMain'
from Main.java:198:in `internalRun'
from Main.java:164:in `run'
from Main.java:148:in `run'
from Main.java:128:in `main'
[gabor@gabor-desktop-arch ~]$ irb
jruby-1.6.1 :001 > /(?<a>.+)/ =~ ""
=> nil
jruby-1.6.1 :002 > exit
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