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Re: How are regressions possible?

From: Jonathan Wakely <jwakely dot gcc at gmail dot com>
To: Jeff Donner <jeffrey dot donner at gmail dot com>
Cc: gcc-help <gcc-help at gcc dot gnu dot org>
Date: Sun, 2 Sep 2018 15:43:03 +0100
Subject: Re: How are regressions possible?
References: <1535895937.47212.1494144312.09565032@webmail.messagingengine.com>

On Sun, 2 Sep 2018, 14:46 Jeff Donner, <jeffrey.donner@gmail.com> wrote:

> Hi - I thought bugs were added to the test suite, and so, regressions
> should never occur. How is this understanding wrong and why isn't it this
> way?
>

Not all regressions are recurring bugs that have already been fixed.
Anything that used to work and then stops working is a regression. If the
thing that worked wasn't covered by any test in the testsuite the
regression goes unnoticed.

References:
- How are regressions possible?
  - From: Jeff Donner

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