qemu docs fails to build with Sphinx 3.0.x

We've just updated Sphinx to version 3.0.1 and qemu fails to build the docs with this version.

Here's the relevant section in the build log.

CONFDIR="/etc/qemu" /usr/bin/sphinx-build-3  -W -b html -D version=4.2.92 -D release="4.2.92 (qemu-5.0.0-0.rc2.0.1.mga8)" -d .doctrees/devel-html /home/iurt/rpmbuild/BUILD/qemu-5.0.0-rc2/docs/devel docs/devel 
Running Sphinx v3.0.1
making output directory... done
building [mo]: targets for 0 po files that are out of date
building [html]: targets for 14 source files that are out of date
updating environment: [new config] 14 added, 0 changed, 0 removed
reading sources... [  7%] bitops
reading sources... [ 14%] decodetree
reading sources... [ 21%] index
reading sources... [ 28%] kconfig
reading sources... [ 35%] loads-stores
reading sources... [ 42%] memory
reading sources... [ 50%] migration
reading sources... [ 57%] reset
reading sources... [ 64%] s390-dasd-ipl
reading sources... [ 71%] secure-coding-practices
reading sources... [ 78%] stable-process
reading sources... [ 85%] tcg
reading sources... [ 92%] tcg-plugins
reading sources... [100%] testing


Warning, treated as error:
/home/iurt/rpmbuild/BUILD/qemu-5.0.0-rc2/docs/../include/exec/memory.h:3:Type must be either just a name or a typedef-like declaration.
If just a name:
  Error in declarator or parameters
  Invalid C declaration: Expected identifier in nested name, got keyword: struct [error at 6]
    struct MemoryListener
    ------^
If typedef-like declaration:
  Error in declarator or parameters
  Invalid C declaration: Expected identifier in nested name. [error at 21]
    struct MemoryListener
    ---------------------^

make: *** [Makefile:1095: docs/devel/index.html] Error 2
make: *** Waiting for unfinished jobs....

I found this commit for memory.h that includes the section that faults.
https://github.com/qemu/qemu/commit/5d248213180749e674fbccbacc6ee9c38499abb3#diff-d892cbf314945b44699534cc1de4ebbd

You can see the whol build log here.
https://pkgsubmit.mageia.org/uploads/failure/cauldron/core/release/20200410161120.tv.duvel.699/log/qemu-5.0.0-0.rc2.0.1.mga8/build.0.20200410161338.log

System: Mageia Cauldron