NPE in RubyRegexp.java with --1.9
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Key: JRUBY-3858
URL: http://jira.codehaus.org/browse/JRUBY-3858
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules, Ruby 1.9
Affects Versions: JRuby 1.3.1
Environment: trunk - ae08daf
Reporter: Jari Bakken
$ bin/jruby --1.9 -e '/#{Regexp.union("foo", "bar")}/'
RubyRegexp.java:1583:in `to_s': java.lang.NullPointerException
from org/jruby/RubyRegexp$i_method_0_0$RUBYINVOKER$to_s.gen:-1:in `call'
from RubyClass.java:530:in `finvoke'
from RuntimeHelpers.java:406:in `invoke'
from RubyBasicObject.java:608:in `asString'
from -e:1:in `__file__'
from -e:-1:in `load'
from Ruby.java:592:in `runScript'
from Ruby.java:514:in `runNormally'
from Ruby.java:360:in `runFromMain'
from Main.java:272:in `run'
from Main.java:117:in `run'
from Main.java:97:in `main'
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