Issue #9716 has been reported by Mario Maia.

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Bug #9716: FileTest.exist? does not convert relative path to absolute path before testing existence
https://bugs.ruby-lang.org/issues/9716

* Author: Mario Maia
* Status: Open
* Priority: Normal
* Assignee: 
* Category: core
* Target version: 
* ruby -v: 2.1.1p76 (2014-02-24 revision 45161) [i686-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
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`FileTest.exist?(Pathname.new('~/derp').expand_path) => true`
`FileTest.exist?(Pathname.new('~/derp')) => false`



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