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Bug #13028

closed

Binding#irb upon exiting makes _ retain the value of the last expression and never change it

Bug #13028: Binding#irb upon exiting makes _ retain the value of the last expression and never change it

Added by dskecse (Dzianis Dashkevich) almost 9 years ago. Updated over 6 years ago.

Status:
Closed
Assignee:
-
Target version:
-
ruby -v:
ruby 2.4.0rc1 (2016-12-12 trunk 57064) [x86_64-darwin15]
Backport:
2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
[ruby-core:78627]

Description

Given an open irb session. After exiting from binding.irb the _, which is the last value of the current context, somehow retains the value of the last expression evaluated in the context of binding.irb and then doesn't change it. This never happens to the irb subshell in an open irb session.

Steps to reproduce:

  1. Fire up irb.
  2. Type binding.irb.
  3. Get out of the current context by pressing Ctrl-D.
  4. Type anything simple like 1+3.
  5. Type _ to see 4, receive nil instead.

Another example:

  1. Fire up irb.
  2. Type binding.irb.
  3. Type any expression to evaluate like 1+3.
  4. Get out of the current context by pressing Ctrl-D.
  5. Type anything simple like 1+4.
  6. Type _ to see 5, receive 4 instead.

Updated by jeremyevans0 (Jeremy Evans) over 6 years ago Actions
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 #1 [ruby-core:93347]

  • Status changed from Open to Closed

This appears to have been fixed between 2.5 and 2.6:

$ irb25 irb(main):001:0> binding.irb irb(main):001:0> 1+3 => 4 irb(main):002:0> exit => 0 irb(main):002:0> 1+4 => 5 irb(main):003:0> _ => 4 $ irb26 irb(main):001:0> binding.irb irb(main):001:0> 1+3 => 4 irb(main):002:0> exit => 0 irb(main):002:0> 1+4 => 5 irb(main):003:0> _ => 5
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