Issue #9726 has been reported by Vladimir Smelyansky.

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Bug #9726: Incorrect Proc parsing
https://bugs.ruby-lang.org/issues/9726

* Author: Vladimir Smelyansky
* Status: Open
* Priority: Normal
* Assignee: Yukihiro Matsumoto
* Category: syntax
* Target version: 
* ruby -v: ruby 1.9.3p327 (2012-11-10 revision 37606) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
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There seems to be issue in parsing with white space:

The code below works:
proc_issue (Proc.new { |n|
  "Do something"
})

That code causing parsing error (removing white space makes it working proc_issue (Proc..)
proc_issue (Proc.new do |n|
  "Do something"
end)







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