quote removal issues within character class

From	Oğuz <oguzismailuysal@gmail.com>
Newsgroups	gnu.bash.bug
Subject	quote removal issues within character class
Date	2019-11-09 00:50 +0300
Message-ID	<mailman.1040.1573249873.13325.bug-bash@gnu.org> (permalink)
References	<CAH7i3LrZFvJ1ELJzTdQzF1tTqhi9FDrA7xWWYWrd4RgWJs0Wtg@mail.gmail.com>

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v=foo
echo ${v#[[:"lower":]]}

should print oo, but it prints foo instead. This is reproducible on bash
>4.4

Plus

case foo in (*[![:"lower":]]*) echo bar; esac

prints bar, while

case foo in (*[![":lower":]]*) echo bar; esac

doesn't print anything. And this is only reproducible on bash >5.0

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quote removal issues within character class Oğuz <oguzismailuysal@gmail.com> - 2019-11-09 00:50 +0300

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