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Re: Ping: [PATCH] flask: fix gcov build with gcc14+
- To: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 21 Jan 2026 14:35:41 +0100
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 21 Jan 2026 13:35:53 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 21.01.2026 14:14, Daniel P. Smith wrote:
> Apologies, I've been on travel for the last two weeks and I wasn't
> comfortable acking this with just a read of the diff. The thing that bothers
> me that I want to understand better is why only after the else does it worry
> about null terminated. Additionally, stepping back, a casual reader of the
> code is going to wonder why only after some reads into the buffer does it
> need a null while others do not.
I'm curious to know of an example or two which you refer to here, as ...
> I think most people would find that as a red flag that an underlying issue is
> getting papers papered over. I will be back from travel this weekend and I
> will sit down and review with more context.
>
> V/r,
> DPS
>
> On January 19, 2026 8:50:02 AM CST, Jan Beulich <jbeulich@xxxxxxxx> wrote:
>> Daniel,
>>
>> On 08.01.2026 10:18, Jan Beulich wrote:
>>> Gcc's "threading" of conditionals can lead to undue warnings, as reported
>>> in e.g. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116519 (no matter
>>> that the overall situation is different there). While my gcc15 complains
>>> ("buf[2] may be used uninitialized in this function") about only two of
>>> the three instances (not about the one in type_read()), adjust all three
>>> to be on the safe side.
... I've already extended the change to cover all three similar patterns, no
matter that only two triggered a warning.
Jan
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