From: Sakuro OZAWA <redmine@...>
Date: 2010-10-20T10:54:38+09:00
Subject: [ruby-core:32855] [Ruby 1.8-Bug#3969][Open] irb causes NameError when trapping SIGWINCH with string

Bug #3969: irb causes NameError when trapping SIGWINCH with string
http://redmine.ruby-lang.org/issues/show/3969

Author: Sakuro OZAWA
Status: Open, Priority: Normal
ruby -v: ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-darwin9]

Trapping SIGWINCH with a proc works.

 $ irb -f
 
 irb(main):001:0> Signal.trap('SIGWINCH', proc { puts 'hola! from proc' })
 => nil
 irb(main):002:0> hola! from proc # changing size of terminal window via GUI
 irb(main):002:0> hola! from proc
 irb(main):002:0> hola! from proc
 irb(main):002:0> hola! from proc
 puts
 
 => nil
 irb(main):003:0> 


But trapping SIGWINCH with a string (method name) causes error.

 $ irb -f

 irb(main):001:0> def hola; puts 'hola! from named method'; end
 => nil
 irb(main):002:0> Signal.trap('SIGWINCH', 'hola')
 => nil
 irb(main):003:0> hola! from named method # changing size of terminal window via GUI
 irb(main):003:0> hola! from named method
 irb(main):003:0> hola! from named method
 irb(main):003:0> hola! from named method
 puts
 /opt/local/lib/ruby/1.8/irb/input-method.rb:98:in `gets': uninitialized constant HISTORY (NameError)
 	from /opt/local/lib/ruby/1.8/irb.rb:140:in `eval_input'
 	from /opt/local/lib/ruby/1.8/irb.rb:271:in `signal_status'
 	from /opt/local/lib/ruby/1.8/irb.rb:139:in `eval_input'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:189:in `call'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:189:in `buf_input'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:104:in `getc'
 	from /opt/local/lib/ruby/1.8/irb/slex.rb:206:in `match_io'
 	from /opt/local/lib/ruby/1.8/irb/slex.rb:76:in `match'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:287:in `token'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:263:in `lex'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:234:in `each_top_level_statement'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:230:in `loop'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:230:in `each_top_level_statement'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:229:in `catch'
 	from /opt/local/lib/ruby/1.8/irb/ruby-lex.rb:229:in `each_top_level_statement'
 	from /opt/local/lib/ruby/1.8/irb.rb:154:in `eval_input'
 	from /opt/local/lib/ruby/1.8/irb.rb:71:in `start'
 	from /opt/local/lib/ruby/1.8/irb.rb:70:in `catch'
 	from /opt/local/lib/ruby/1.8/irb.rb:70:in `start'
 	from /opt/local/bin/irb:13


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