Bug #6302: irb で math-mode 中でも conf.math_mode に nil を代入すると math-mode を抜ける事ができる

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

[sho-h (Sho Hashimoto)]

irb では、一度 math-mode になった場合は抜ける事ができない仕様だと思いますが、conf.math_mode に nil を代入すると math-mode を抜ける事ができてしまうようです。(1.9.3-p125 で確認しましたが、trunk でも同様のようです)

conf.math_mode = true
=> true
conf.math_mode = nil
=> nil
conf.math_mode = false
=> false
conf.math_mode = true
=> true
conf.math_mode = false
IRB::CantReturnToNormalMode: Normalモードに戻れません.
from (irb):10
from /home/sho-h/.rvm/rubies/ruby-1.9.3-p125/bin/irb:16:in `'

false 以外でも抜ける事ができるように修正するのがよいのではないかと思いました。

--- lib/irb/ext/math-mode.rb (revision 35336)
+++ lib/irb/ext/math-mode.rb (working copy)
@@ -16,7 +16,7 @@
alias math? math_mode

 def math_mode=(opt)

•  if @math_mode == true && opt == false
  

•  if @math_mode == true && !opt
    IRB.fail CantReturnToNormalMode
    return
   end
  

[ayumin (Ayumu AIZAWA)]

• Category set to lib
• Assignee set to keiju (Keiju Ishitsuka)

[mame (Yusuke Endoh)]

• Status changed from Open to Assigned

[keiju (Keiju Ishitsuka)]

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

This issue was solved with changeset r38621.
Sho, thank you for reporting this issue.
Your contribution to Ruby is greatly appreciated.
May Ruby be with you.

---

• lib/irb/ext/math-mode.rb: make not able to change math-mode
  after irb starting [Bug #6302]. Patched by sho-h.