Hi @jeroen and @jimhester,
Since approx 12:45 (UTC+1) Travis builds for Bionic fail.
For example, from this Travis build log I read Xenial is used:
R session information
before_install.1
1.64s$ sudo add-apt-repository -y ppa:opencpu/imagemagick
6.94s$ sudo apt-get update
Hit:1 http://us-east-1.ec2.archive.ubuntu.com/ubuntu xenial InRelease
Hit:2 http://us-east-1.ec2.archive.ubuntu.com/ubuntu xenial-updates InRelease
Hit:3 http://us-east-1.ec2.archive.ubuntu.com/ubuntu xenial-backports InRelease
Get:4 http://apt.postgresql.org/pub/repos/apt xenial-pgdg InRelease [56.4 kB]
...
At the top of my .travis.yml
file it can be found I use bionic:
language: r
dist: bionic
cache: packages
Also when I re-build a package that built successfully, I get the same error.
For completeness I add the error that I predict follow naturally from this problem:
Ign:15 http://apt.postgresql.org/pub/repos/apt xenial-pgdg/main i386 Packages
Get:14 http://apt.postgresql.org/pub/repos/apt xenial-pgdg/main amd64 Packages [115 kB]
Err:14 http://apt.postgresql.org/pub/repos/apt xenial-pgdg/main amd64 Packages
Hash Sum mismatch
Fetched 149 kB in 0s (188 kB/s)
Reading package lists...
E: Failed to fetch http://apt.postgresql.org/pub/repos/apt/dists/xenial-pgdg/main/binary-amd64/Packages.bz2 Hash Sum mismatch
E: Failed to fetch http://apt.postgresql.org/pub/repos/apt/dists/xenial-pgdg/main/binary-i386/Packages.bz2 Writing more data than expected (209052 > 209044)
E: Some index files failed to download. They have been ignored, or old ones used instead.
Happy to help and good luck fixing this