The merge was fine but running tests failed.

[trusty] starting container
[trusty] (timing) 0.00user 0.00system 0:00.25elapsed 3%CPU (0avgtext+0avgdata 4904maxresident)k
[trusty] (timing) 0inputs+72outputs (0major+1093minor)pagefaults 0swaps
[trusty] provisioning container
[trusty] (timing) 62.36user 184.13system 8:31.31elapsed 48%CPU (0avgtext+0avgdata 68324maxresident)k
[trusty] (timing) 504inputs+1537800outputs (18major+1186169minor)pagefaults 0swaps
[trusty-testing] Starting tests...
Found a test script: ./requirements/container-tests-checkbox-support
[trusty-testing] container-tests-checkbox-support: FAIL
[trusty-testing] stdout: https://paste.ubuntu.com/p/TTyDXCWkH7/
[trusty-testing] stderr: https://paste.ubuntu.com/p/bVpm5cmbGq/
[trusty-testing] (timing) Command exited with non-zero status 1
[trusty-testing] (timing) 13.57user 0.17system 0:13.95elapsed 98%CPU (0avgtext+0avgdata 129288maxresident)k
[trusty-testing] (timing) 328inputs+904outputs (1major+125867minor)pagefaults 0swaps
[trusty-testing] Fixing file permissions in source directory
[trusty-testing] Destroying container
Name:           trusty-testing
State:          STOPPED
[xenial] starting container
[xenial] (timing) 0.00user 0.00system 0:00.31elapsed 2%CPU (0avgtext+0avgdata 4992maxresident)k
[xenial] (timing) 0inputs+72outputs (0major+1087minor)pagefaults 0swaps
[xenial] provisioning container
[xenial] (timing) 25.56user 15.31system 3:49.77elapsed 17%CPU (0avgtext+0avgdata 82272maxresident)k
[xenial] (timing) 72inputs+1444464outputs (0major+1171608minor)pagefaults 0swaps
[xenial-testing] Starting tests...
Found a test script: ./requirements/container-tests-checkbox-support
[xenial-testing] container-tests-checkbox-support: FAIL
[xenial-testing] stdout: https://paste.ubuntu.com/p/bxFgR63fzt/
[xenial-testing] stderr: https://paste.ubuntu.com/p/3QB39Cr4Mw/
[xenial-testing] (timing) Command exited with non-zero status 1
[xenial-testing] (timing) 15.19user 0.20system 0:16.88elapsed 91%CPU (0avgtext+0avgdata 144708maxresident)k
[xenial-testing] (timing) 3784inputs+2840outputs (14major+133507minor)pagefaults 0swaps
[xenial-testing] Fixing file permissions in source directory
[xenial-testing] Destroying container
Name:           xenial-testing
State:          STOPPED
[bionic] starting container
[bionic] (timing) 0.00user 0.00system 0:00.25elapsed 3%CPU (0avgtext+0avgdata 4976maxresident)k
[bionic] (timing) 0inputs+72outputs (0major+1099minor)pagefaults 0swaps
[bionic] provisioning container
[bionic] (timing) 25.30user 17.40system 3:54.45elapsed 18%CPU (0avgtext+0avgdata 87128maxresident)k
[bionic] (timing) 10776inputs+1371880outputs (0major+1249767minor)pagefaults 0swaps
[bionic-testing] Starting tests...
Found a test script: ./requirements/container-tests-checkbox-support
[bionic-testing] container-tests-checkbox-support: FAIL
[bionic-testing] stdout: https://paste.ubuntu.com/p/mRBJ8psvJg/
[bionic-testing] stderr: https://paste.ubuntu.com/p/2tJXrcv2FB/
[bionic-testing] (timing) Command exited with non-zero status 1
[bionic-testing] (timing) 13.91user 0.19system 0:15.00elapsed 93%CPU (0avgtext+0avgdata 130892maxresident)k
[bionic-testing] (timing) 248inputs+2792outputs (0major+131523minor)pagefaults 0swaps
[bionic-testing] Fixing file permissions in source directory
[bionic-testing] Destroying container
Name:           bionic-testing
State:          STOPPED