[ruby-core:57257] [ruby-trunk - Bug #8920][Open] Exception when using a variable defined in end-of-line if statement

Issue #8920 has been reported by jfredett (Joe Fredette).

----------------------------------------
Bug #8920: Exception when using a variable defined in end-of-line if statement
https://bugs.ruby-lang.org/issues/8920

Author: jfredett (Joe Fredette)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0p247 
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN


The following code raises an exception on each MRI version (exact `ruby -v` output attached at the end of this post):

````
class Test
  def foo
    puts "No Exception!"
  end
end

begin
  t.foo if t = Test.new
rescue Exception => e
  STDERR.puts "Exception raised! ``#{e.class}: #{e}''"
  exit 1
end

exit 0
````

The exception raised is:

````

NameError: undefined local variable or method `t' for main:Object


````

The output I expected was "No Exception."

This script was run on the following system:

````

$ rvm --version
#=> rvm 1.21.17 (stable) by Wayne E. Seguin <[e-mail]>, Michal Papis <[e-mail]> [https://rvm.io/]

$ uname -a
#=> Darwin JGF.local 12.4.0 Darwin Kernel Version 12.4.0: Wed May  1 17:57:12 PDT 2013; root:xnu-2050.24.15~1/RELEASE_X86_64 x86_64 i386 MacBookPro8,2 Darwin

````

(For reference, this is a mid-2011 Macbook Pro)

and raises the unexpected exception on the following ruby versions:

````

ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin12.0]
ruby 1.9.3p448 (2013-06-27 revision 41675) [x86_64-darwin12.3.0]
ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin12.3.0]

````

It also appears to raise in JRuby, but not in Rubinius, though that may or may not be relevant for this bugtracker.

Please let me know if I need to provide any other details. I put 2.0.0 in the `ruby -v` field, but it is reproducible on each of the MRI versions I listed above.




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