This only stopped working recently. I cannot install clang-5.0 from llvm-toolchain-trusty-5.0. The error I get is:
The following packages have unmet dependencies: clang-5.0 : Depends: libjsoncpp0 (>= 0.6.0~rc2) but it is not installable E: Unable to correct problems, you have held broken packages.
The full command and error can be found here: https://travis-ci.org/ericniebler/range-v3/jobs/526944526
Did something change recently? Any workarounds?