BUG #16222: [[:print:]] doesn't correctly handle Emoji skin tone modifiers on MacOS

From: PG Bug reporting form <noreply(at)postgresql(dot)org>
To: pgsql-bugs(at)lists(dot)postgresql(dot)org
Cc: mack(at)agilereasoning(dot)com
Subject: BUG #16222: [[:print:]] doesn't correctly handle Emoji skin tone modifiers on MacOS
Date: 2020-01-21 17:16:16
Message-ID: 16222-35e7eba712c52525@postgresql.org
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The following bug has been logged on the website:

Bug reference: 16222
Logged by: Mack Earnhardt
Email address: mack(at)agilereasoning(dot)com
PostgreSQL version: 11.6
Operating system: MacOS Catalina
Description:

On Linux heroku-18, these expressions both eval true:

select '✌'~'\A[[:print:]]*\Z';
select '✌🏻'~'\A[[:print:]]*\Z';

On MacOS Catalina, the 1st evals true but the 2nd evals false.

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