Issue #11197 has been reported by Dan Lesser.

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Bug #11197: POSIX matchers broken in Regexp
https://bugs.ruby-lang.org/issues/11197

* Author: Dan Lesser
* Status: Open
* Priority: Low
* Assignee: 
* ruby -v: 2.1.5
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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The POSIX matchers [[:alnum:]] and [[:alpha:]] in the Regexp class seem to be broken, as they successfully match all characters in the (example) string "".



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