y:554:  BUILDSTDERR:  Problem 9: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-nom+default-devel-4.2.3-3.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 10: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-once_cell+default-devel-0.2.4-1.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 11: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-proptest+default-devel-0.9.4-3.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 12: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-rand0.5+default-devel-0.5.6-5.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 13: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-regex+default-devel-1.2.1-1.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 14: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-tempfile+default-devel-3.1.0-2.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 15: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-unicode-segmentation+default-devel-1.3.0-3.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 16: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-unicode-width+default-devel-0.1.5-11.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 17: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-url+default-devel-1.7.2-5.fc31.noarch
DEBUG util.py:554:  BUILDSTDERR:  Problem 18: conflicting requests
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides cargo needed by rust-packaging-6-1.fc29.noarch
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides rust needed by rust-packaging-6-1.fc29.noarch
DEBUG util.py:554:  BUILDSTDERR:   - nothing provides rust-srpm-macros = 6 needed by rust-packaging-6-1.fc29.noarch
DEBUG util.py:698:  Child return code was: 1
DEBUG util.py:292:  kill orphans
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '/var/lib/mock/f31-build-107884-33708/root/proc/filesystems'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '-l', '/var/lib/mock/f31-build-107884-33708/root/dev/pts'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '-l', '/var/lib/mock/f31-build-107884-33708/root/dev/shm'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '-l', '/var/lib/mock/f31-build-107884-33708/root/sys'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0
DEBUG util.py:717:  child environment: None
DEBUG util.py:643:  Executing command: ['/bin/umount', '-n', '-l', '/var/lib/mock/f31-build-107884-33708/root/proc'] with env {'TERM': 'vt100', 'SHELL': '/bin/sh', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'LANG': 'en_US.UTF-8'} and shell False
DEBUG util.py:698:  Child return code was: 0