Passing object with no 'to_s' method to IO#<< causes SystemStackError
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Key: JRUBY-1081
URL: http://jira.codehaus.org/browse/JRUBY-1081
Project: JRuby
Issue Type: Bug
Affects Versions: JRuby 1.0.0RC2
Environment: Solaris 10, Java 1.5, JRuby 2007-05-31 rev 3672
Reporter: Daniel Berger
Assignee: Thomas E Enebo
The IO#<< method relies on the .to_s method of the arguments passed to it . If
that method is not defined, MRI simply raises a NoMethodError. JRuby, however,
raises a SystemStackError. Here's an irb session that demonstrates:
{noformat}
irb(main):001:0> class Foo; end
=> nil
irb(main):002:0> STDOUT << Foo.new
#<Foo:0x15f7107>=> #<IO:0xf593af> # ok, no problem
irb(main):003:0> class Foo; undef_method :to_s; end
=> Foo
irb(main):004:0> STDOUT << Foo.new # blam!
/export/home/djberge/jruby/lib/ruby/1.8/irb/workspace.rb:51:in `eval': stack
level too deep (SystemStackError)
from /export/home/djberge/jruby/lib/ruby/1.8/irb/workspace.rb:81:in
`evaluate'
from /export/home/djberge/jruby/lib/ruby/1.8/irb/context.rb:219:in
`evaluate'
from /export/home/djberge/jruby/lib/ruby/1.8/irb.rb:150:in `eval_input'
from /export/home/djberge/jruby/lib/ruby/1.8/irb.rb:70:in
`signal_status'
from /export/home/djberge/jruby/lib/ruby/1.8/irb.rb:189:in `eval_input'
from /export/home/djberge/jruby/lib/ruby/1.8/irb.rb:70:in
`each_top_level_statement'
from /export/home/djberge/jruby/lib/ruby/1.8/irb.rb:190:in `loop'
from /export/home/djberge/jruby/lib/ruby/1.8/irb/ruby-lex.rb:258:in
`each_top_level_statement'
from /export/home/djberge/jruby/lib/ruby/1.8/irb.rb:190:in `catch'
from /export/home/djberge/jruby/lib/ruby/1.8/irb/ruby-lex.rb:259:in
`each_top_level_statement'
from /export/home/djberge/jruby/lib/ruby/1.8/irb.rb:190:in `eval_input'
from /export/home/djberge/jruby/lib/ruby/1.8/irb.rb:70:in `start'
from :-1:in `catch'
from /export/home/djberge/jruby/lib/ruby/1.8/irb.rb:71:in `start'
from :-
{noformat}
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