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Re: Suspicious warning in W64 build

From: Paul Eggert
Subject: Re: Suspicious warning in W64 build
Date: Sat, 16 Sep 2017 23:42:49 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0

Eli Zaretskii wrote:
I don't see how this could be anything but a GCC bug.  Yes,
buffer_display_table can return NULL, but every place that calls it
makes sure the result is non-NULL before dereferencing it.  Did I miss

Older versions of GCC sometimes "forget" obvious things like that, if they are spilled into memory or something (sorry, don't know the details).

Perhaps we should insist on something newer than GCC 5.3 before enabling warnings by default, as there is a point of diminishing returns here.

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