On 19.07.23 19:15, Tristan Partin wrote:
On Sun Jul 9, 2023 at 2:23 AM CDT, Peter Eisentraut wrote:
On 06.07.23 15:41, Tristan Partin wrote:
> On Thu Jul 6, 2023 at 3:21 AM CDT, Peter Eisentraut wrote:
>> On 05.07.23 23:06, Tristan Partin wrote:
>>> Thanks for following up. My system is Fedora 38. I can confirm this is
>>> still happening on master.
>>>
>>> $ gcc --version
>>> gcc (GCC) 13.1.1 20230614 (Red Hat 13.1.1-4)
>>> Copyright (C) 2023 Free Software Foundation, Inc.
>>> This is free software; see the source for copying conditions. There is NO >>> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>>> $ meson setup build --buildtype=release
>>
>> This buildtype turns on -O3 warnings.  We have usually opted against
>> chasing warnings in -O3 level because there are often some
>> false-positive uninitialized variable warnings with every new compiler.
>>
>> Note that we have set the default build type to debugoptimized, for that
>> reason.
> > Good to know, thanks.
> > Regarding the original patch, do you think it is good to be applied?

That patch looks reasonable.  But I can't actually reproduce the warning, even with gcc-13.  I do get the warning from plpgsql.  Can you show the warning you are seeing?

Here is the full warning that the original patch suppresses.

I was able to reproduce the warning now on Fedora.  I agree with the patch

-       PgBenchValue vargs[MAX_FARGS];
+       PgBenchValue vargs[MAX_FARGS] = { 0 };

I suggest to also do

 typedef enum
 {
-       PGBT_NO_VALUE,
+       PGBT_NO_VALUE = 0,

to make clear that the initialization value is meant to be invalid.

I also got the plpgsql warning that you showed earlier, but I couldn't think of a reasonable way to fix that.



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