Clang-10 was recently broken on Linux: unmet dependencies for clang-10, clang-tidy-10, valgrind

Travis CI Discussions & Feedback
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Here’s my build from 2 days ago, when clang-10 worked:

https://travis-ci.com/github/acgetchell/CDT-plusplus/builds/224190069

And here’s today’s build, where clang-10 is broken:

https://travis-ci.com/github/acgetchell/CDT-plusplus/builds/224427821

Per this line:

https://travis-ci.com/github/acgetchell/CDT-plusplus/jobs/501795386#L185

It works on GitHub actions on Ubuntu 20.04, so it’s not my code:

Please fix!

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This is a 3rd-party problem. Ubuntu maintainers have called off the latest libc release for Focal, 2.31-0ubuntu9.3, which Travis builders have preinstalled.
So the packages you’re trying to install (in partucular, valgrind dependency libc6-dbg) now require an earlier version while the preinstalled libc6-dev requires the new one. Apt can’t resolve this situation automatically.

In your Github Action, you’re installing a different set of packages, from a different source – in particular, you’re not installing valgrind.

Comment out the addons: apt: section and add the following commands. The first one downgrades libc6 and libc6-dev, the 2nd one manually installs the packages that you were installing in your addons: apt: clause.

before_install:
  - sudo apt-get install -yq --allow-downgrades libc6=2.31-0ubuntu9.2 libc6-dev=2.31-0ubuntu9.2
  - sudo -E apt-get -yq --no-install-suggests --no-install-recommends --allow-downgrades --allow-remove-essential --allow-change-held-packages install build-essential automake autoconf autoconf-archive libtool-bin texinfo yasm gcc-10 g++-10 clang-10 clang-format-10 clang-tidy-10 ninja-build cppcheck valgrind doxygen graphviz lcov -o Debug::pkgProblemResolver=yes
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FYI, to specify multiline commands, use YAML blocks like you do in your script: clause.

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I can confirm this fixed the problem, thank you!

Now I’m probably going to go back and isolate this to just my valgrind runs.

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Can we expect this fixed any time soon or all the projects using this set of packages on Focal will have to apply this workaround?

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The workaround is only needed if you install libc6-dbg (or anything that depends on it).

I already notified the support that they need to downgrade libc in the images.

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Hey @acgetchell / @Jakuje,

Now, once you use dist: focal and language: cpp within your build will be using the default version that should be ldd (Ubuntu GLIBC 2.31-0ubuntu9.2) 2.31. I have also tested this [1] and it gets the version correctly.

@native-api again, thank you for the workaround.

Have a good one,

Best

[1] Travis CI - Test and Deploy with Confidence