Description of problem: mock build with epel7 root. mock should requires dnf-utils. Version-Release number of selected component: mock-1.4.13-1.fc28 Additional info: reporter: libreport-2.9.5 cmdline: /usr/bin/python3 -tt /usr/libexec/mock/mock --no-clean --no-cleanup-after -r epel-7-x86_64 --resultdir /run/media/cheese/cheesenotes/pkgdb/dpkg/results_dpkg/1.18.25/3.fc30 --rebuild /run/media/cheese/cheesenotes/pkgdb/dpkg/dpkg-1.18.25-3.fc30.src.rpm crash_function: _execute_child exception_type: FileNotFoundError executable: /usr/libexec/mock/mock interpreter: python3-3.6.6-1.fc28.x86_64 kernel: 4.17.14-202.fc28.x86_64 runlevel: N 5 type: Python3 uid: 0 Truncated backtrace: #1 _execute_child in /usr/lib64/python3.6/subprocess.py:1344 #2 __init__ in /usr/lib64/python3.6/subprocess.py:709 #3 do in /usr/lib/python3.6/site-packages/mockbuild/util.py:589 #4 trace in /usr/lib/python3.6/site-packages/mockbuild/trace_decorator.py:96 #5 execute in /usr/lib/python3.6/site-packages/mockbuild/package_manager.py:129 #6 trace in /usr/lib/python3.6/site-packages/mockbuild/trace_decorator.py:96 #7 builddep in /usr/lib/python3.6/site-packages/mockbuild/package_manager.py:159 #8 trace in /usr/lib/python3.6/site-packages/mockbuild/trace_decorator.py:96 #9 installSrpmDeps in /usr/lib/python3.6/site-packages/mockbuild/backend.py:203 #10 trace in /usr/lib/python3.6/site-packages/mockbuild/trace_decorator.py:96
Created attachment 1481952 [details] File: backtrace
Created attachment 1481953 [details] File: cgroup
Created attachment 1481954 [details] File: cpuinfo
Created attachment 1481955 [details] File: environ
Created attachment 1481956 [details] File: mountinfo
Created attachment 1481957 [details] File: namespaces
Created attachment 1481958 [details] File: open_fds
Note that dnf-utils is weak dependency as most operations can be done without dnf-utils. I will leave it open as Mock should not end with the traceback, instead it should print a nice error message.
Fixed in: https://github.com/rpm-software-management/mock/pull/221 Now mock print user-friendly error.
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