Issue #12234 has been reported by Vais Salikhov.

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Bug #12234: Kernel#exec with a command array broken on Windows as of Ruby 2.2.4
https://bugs.ruby-lang.org/issues/12234

* Author: Vais Salikhov
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.2.4p230 (2015-12-16 revision 53155) [i386-mingw32]
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
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On Ruby 2.0.0 this worked as expected:
```
C:\Users\Administrator\GitHub\spec>ruby -ve "exec(['cmd.exe', '/C'], 'echo', 'argv_zero')"
ruby 2.0.0p247 (2013-06-27) [i386-mingw32]
argv_zero
```
On Ruby 2.2.4 it is broken - it seems to be getting stuck somehow in the new shell and never returns:
```
C:\Users\Administrator>c:\Ruby\ruby-2.2.4-i386-mingw32\bin\ruby.exe -ve "exec(['cmd.exe', '/C'], 'echo', 'argv_zero')"
ruby 2.2.4p230 (2015-12-16 revision 53155) [i386-mingw32]
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.

C:\Users\Administrator>
```



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