Package cannot be installed or updated

[Christophe Prud'homme]

when installing libpetsc-real3.11-dev, I get the following error

Setting up libpetsc3.11-dev-examples (3.11.3+dfsg1-2) ...
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/config/cmakegen.py'
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/config/example_template.py'
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/config/gmakegen.py'
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/config/gmakegentest.py'
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/config/report_tests.py'
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/config/testparse.py'
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/src/ksp/ksp/examples/tutorials/ex100.py'
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/src/ksp/ksp/examples/tutorials/example100.py'
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/src/ts/examples/tutorials/ex8.py'
[Errno 2] No such file or directory: '/usr/share/doc/libpetsc3.11-dev-examples/examples/src/ts/examples/tutorials/extchem.py'
dpkg: error processing package libpetsc3.11-dev-examples (--configure):
 installed libpetsc3.11-dev-examples package post-installation script subprocess returned error exit status 1

Note that this bug has been reported on Debian as an RC bug:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=945338

Currently PETSc is unusable in Ubuntu 19.10 (and Debian unstable and testing )

[Christophe Prud'homme (prudhomm-debian)]

Also note that both 19.10 and 20.04 are affected

to reproduce:

docker run -it --rm ubuntu:20.04
apt-get update
apt-get install petsc-dev

[Christophe Prud'homme (prudhomm-debian)]

Note that eoan is still broken