Dear maintainers, I don't think this is an adequate solution as that version does not get installed by default, even if buster-updates are enabled. The version in buster is just broken without this patch.
$ LANG=C apt policy emacs
emacs:
Installed: 1:26.1+1-3.2
Candidate: 1:26.1+1-3.2
Version table:
1:26.1+1-3.2+deb10u1 500
500 http://ftp2.de.debian.org/debian buster-updates/main amd64 Packages
500 http://ftp2.de.debian.org/debian buster-updates/main i386 Packages
*** 1:26.1+1-3.2 990
990 http://ftp2.de.debian.org/debian buster/main amd64 Packages
990 http://ftp2.de.debian.org/debian buster/main i386 Packages
100 /var/lib/dpkg/status
Bye
Michael
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