Problem compiling Mesa on CentOS 8.3

Hi,

I'm using x2go (remote x11 client/server system) on CentOS 7.9 and 8.3 
Docker containers.

On the CentOS 7.9 container, I've successfully compiled mesa 20.3.4 for 
use with Kivy ( https://kivy.org/ )
Kivy is used to create GUIs with python.

Here are the build steps I used:

yum -y install centos-release-scl
yum -y install devtoolset-7
source scl_source enable devtoolset-7 # enables use of gcc v7.3.1

tar -xf mesa-20.3.4.tar.xz
cd mesa-20.3.4
meson --buildtype=release \
--prefix=/opt/mesa/20.3.4 \
-D gbm=enabled \
-D gles1=enabled \
-D gles2=enabled \
-D opengl=true \
-D egl=disabled \
-D shared-glapi=enabled \
-D gallium-drivers=swrast,swr \
-D gbm=disabled \
-D glx=gallium-xlib \
-D osmesa=gallium \
-D gallium-nine=false \
-D gallium-xvmc=disabled \
-D platforms=x11 \
-D llvm=enabled \
-D shared-llvm=disabled \
-D dri3=disabled \
-D dri-drivers= \
-D dri-drivers-path= \
-D vulkan-drivers= \
-D lmsensors=disabled \
build/
ninja -j 1 -C build/ install

export LD_LIBRARY_PATH=/opt/mesa/20.3.4/lib64
export GALLIUM_DRIVER=swr
python3 
/sw/kivy/2.0.0/lib/python3.8/site-packages/Kivy-2.0.0-py3.8-linux-x86_64.egg/share/kivy-examples/demo/showcase/main.py

This starts a Kivy program successfully on a CentOS 7.9 container and it 
works without problems.

But on the CentOS 8.3 container this doesn't work. The compilation 
succeeds, but I get the following error message when starting 
showcase/main.py:

/usr/include/c++/8/bits/unique_ptr.h:323: typename 
std::add_lvalue_reference<_Tp>::type std::unique_ptr<_Tp, 
_Dp>::operator*() const [with _Tp = llvm::ProfileSummaryInfo; _Dp = 
std::default_delete<llvm::ProfileSummaryInfo>; typename 
std::add_lvalue_reference<_Tp>::type = llvm::ProfileSummaryInfo&]: 
Assertion 'get() != pointer()' failed.
Aborted (core dumped)

This happens also with glxgears.

If I export GALLIUM_DRIVER=llvmpipe the showcase/main.py program starts 
but there's this weird flickering going on in the program window.

Could this problem have something to do with the llvm version?

On CentOS 7.9 the llvm version is v7.0.1 and on CentOS 8.3 there's only 
llvm v10.0.1.

gcc is v7.3.1 (devtoolset-7) on CentOS 7.9 and v8.3.1 on CentOS 8.3.

Best regards,

Aki Ketolainen
Turku, Finland

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