Bug #6378: irb incorrectly considers line incomplete when parenthesis are excluded

• Status: Closed
• Assignee: keiju (Keiju Ishitsuka)
• Target version: -
• ruby -v: ruby 1.9.3p125 (2012-02-16 revision 34643) [x86_64-darwin11.2.0]

[devans (Daniel Evans)]

Steps to reproduce:

start irb
attempt to execute the following line:
[1,2,3].reduce :+

Expected:
a result of => 6 should be printed and a new line should be available

Actual:
The result is not printed and the shell indicates more lines are expected

irb(main):001:0> [1,2,3].reduce :+
irb(main):002:0*

Workaround:
add parenthesis to the method call:
[1,2,3].reduce(:+)

Notes:
The line is executed, as evidenced by changing the symbol to represent a message to which FixNum does not respond, such as :_ after which the error message will be printed immediately.

This is also reproducible in ruby 1.8.7 (2010-06-23 patchlevel 299) [x86_64-linux]

irb versions tested:
irb 0.9.6(09/06/30)
irb 0.9.5(05/04/13)

[mame (Yusuke Endoh)]

• Status changed from Open to Assigned
• Assignee set to keiju (Keiju Ishitsuka)

Thanks, assigning it to keiju who is a developer/maintainer of irb.

--
Yusuke Endoh [e-mail]

[devans (Daniel Evans)]

I noticed while working today that this only affects certain symbols, particularly :+ and :-

If you attempt the same code with :* it works perfectly.

irb(main):001:0> [1,2,3,4].reduce :-
irb(main):002:0* ^D
irb(main):002:0> [1,2,3,4].reduce :+
irb(main):003:0* ^D
irb(main):003:0> [1,2,3,4].reduce :*
=> 24
irb(main):004:0>

[keiju (Keiju Ishitsuka)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

This issue was solved with changeset r38632.
Daniel, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

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• lib/irb/ruby-lex.rb: make lex_state to EXPR_END when next token
  is an operator after SYMBEG [Bug #6378].