[Bug]: -Wmaybe-uninitialized warnings in InlinedVector

[Vedingrot]

Describe the issue

When build oneline program absl::InlinedVector<int, 16> vec; with -Wall -O2 there
are multiple -Wmaybe-uninitalized warnings.

build_log.txt
It also reproduces in s2geometry when it builds with -Wall -O2
s2geometry_build_log

Steps to reproduce the problem

Create uninitialized.cc:

#include "absl/container/inlined_vector.h"

int main()
{
    absl::InlinedVector<int, 16> vec;
    return 0;
}

Create CMakeLists.txt:

cmake_minimum_required(VERSION 3.10)

project(my_project)

set(CMAKE_CXX_STANDARD 17)

add_subdirectory(abseil-cpp)

add_executable(uninitialized uninitialized.cc)

target_link_libraries(uninitialized absl::inlined_vector)

Build:

mkdir build/ && cd build/
cmake '-DCMAKE_CXX_FLAGS=-Wall -O2' ..
make -j 10 VERBOSE=1

What version of Abseil are you using?

6bf3c73

What operating system and version are you using?

ALT Linux Regular Sisyphus

What compiler and version are you using?

gcc -v
Using built-in specs.
COLLECT_GCC=x86_64-alt-linux-gcc
COLLECT_LTO_WRAPPER=/usr/lib64/gcc/x86_64-alt-linux/13/lto-wrapper
Target: x86_64-alt-linux
Configured with: ../configure --host=x86_64-alt-linux --build=x86_64-alt-linux --target=x86_64-alt-linux --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var/lib --sharedstatedir=/var/lib --mandir=/usr/share/man --infodir=/usr/share/info --disable-dependency-tracking --disable-silent-rules --without-included-gettext --enable-shared --program-suffix=-13 --with-slibdir=/lib64 --libexecdir=/usr/lib64 --with-bugurl=http://bugzilla.altlinux.org --enable-__cxa_atexit --enable-threads=posix --enable-checking=release --with-system-zlib --with-zstd --without-included-gettext --enable-multilib --enable-default-pie --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --with-arch_32=i586 --with-tune_32=generic --with-multilib-list=m64,m32,mx32 --with-gcc-major-version-only --enable-vtable-verify --enable-bootstrap --with-build-config=bootstrap-lto --enable-link-serialization=1 --enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,lto --enable-plugin
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.2.1 20240128 (ALT Sisyphus 13.2.1-alt3) (GCC) 

What build system are you using?

cmake version 3.28.3

Additional context

No response