Build warnings - October 2023

[TabLand]

Bug report

Bug description:

Building python from source returns the following warnings:

./Include/internal/pycore_call.h:185:16: warning: ‘small_stack’ may be used uninitialized [-Wmaybe-uninitialized]
./Include/internal/pycore_call.h:187:11: warning: ‘small_stack’ may be used uninitialized [-Wmaybe-uninitialized]
./Modules/_decimal/libmpdec/context.c:56: warning: mpd_setminalloc: ignoring request to set MPD_MINALLOC a second time
./Modules/_decimal/libmpdec/io.c:348:40: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
./Modules/_xxinterpchannelsmodule.c:104:1: warning: ‘get_module_from_owned_type’ defined but not used [-Wunused-function]

commit 8c07137 (HEAD -> main, origin/main, origin/HEAD)
Date: Tue Oct 3 08:10:16 2023 +0200

Logs attached: build.log

I will aim to investigate these one by one this week

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux

Linked PRs

• gh-110266: Fix "get_module_from_owned_type is unused" warning #110269

[AlexWaygood]

./Modules/_decimal/libmpdec/context.c:56: warning: mpd_setminalloc: ignoring request to set MPD_MINALLOC a second time

This one dates from #107287: see #107287 (comment). It's possible that the other one from ./Modules/_decimal/libmpdec might stem from the same PR.

[TabLand]

Relates to #103186

[sobolevn]

This is strange:

» ag get_module_from_owned_type   
Modules/_xxinterpchannelsmodule.c
104:get_module_from_owned_type(PyTypeObject *cls)
2349:    PyObject *mod = get_module_from_owned_type(cls);
                                      

[AlexWaygood]

./Modules/_decimal/libmpdec/context.c:56: warning: mpd_setminalloc: ignoring request to set MPD_MINALLOC a second time

This one dates from #107287: see #107287 (comment). It's possible that the other one from ./Modules/_decimal/libmpdec might stem from the same PR.

Looks like #107524 has already been opened to suppress this warning (but it has not yet been reviewed by a core developer)

[iritkatriel]

Is there anything left to do here?

[TabLand]

Hi @iritkatriel,

Apologies for the radio silence...
I can no longer see these warnings in recent build logs.

Many thanks everyone!