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Re: gl_array_list.c:452:29: runtime error: applying zero offset to null


From: Paul Eggert
Subject: Re: gl_array_list.c:452:29: runtime error: applying zero offset to null pointer
Date: Mon, 1 Nov 2021 12:21:18 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.1.2

On 10/21/21 12:38, PaweĊ‚ Krawczyk wrote:

gl_array_list.c:452:29: runtime error: applying zero offset to null pointer
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior gl_array_list.c:452:29 
in

The Gnulib portability assumptions <https://www.gnu.org/software/gnulib/manual/html_node/Other-portability-assumptions.html> say it's OK to add 0 to a null pointer. If you have a real platform (i.e., not a pedantic testing framework) where this is an issue, please let us know. Otherwise you might look into some way to have clang not nag you about this non-problem.



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