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+ make test
make -C testsuite/tests CLEANUP=1 SUMMARY_FILE=../../testsuite_summary.txt
make[1]: Entering directory '/builddir/build/BUILD/ghc-8.2.0.20170404/testsuite/tests'
"/builddir/build/BUILD/ghc-8.2.0.20170404/inplace/bin/ghc-stage2" --make -o ../mk/ghc-config ../mk/ghc-config.hs
[1 of 1] Compiling Main             ( ../mk/ghc-config.hs, ../mk/ghc-config.o )
Linking ../mk/ghc-config ...
../mk/ghc-config "/builddir/build/BUILD/ghc-8.2.0.20170404/inplace/bin/ghc-stage2" >"../mk/ghcconfig_builddir_build_BUILD_ghc-8.2.0.20170404_inplace_bin_ghc-stage2.mk"; if [ $? != 0 ]; then rm -f "../mk/ghcconfig_builddir_build_BUILD_ghc-8.2.0.20170404_inplace_bin_ghc-stage2.mk"; exit 1; fi
Looks like you don't have timeout, building it first...
make -C ../timeout all
make[2]: Entering directory '/builddir/build/BUILD/ghc-8.2.0.20170404/testsuite/timeout'
rm -f -f TimeMe.o TimeMe.hi TimeMe TimeMe.exe
python3 calibrate '' > calibrate.out
Traceback (most recent call last):
  File "calibrate", line 20, in <module>
    compiler_name, 'TimeMe.hs', '-o', 'TimeMe', '-O2')
  File "/usr/lib64/python3.6/os.py", line 920, in spawnl
    return spawnv(mode, file, args)
  File "/usr/lib64/python3.6/os.py", line 871, in spawnv
    return _spawnvef(mode, file, args, None, execv)
  File "/usr/lib64/python3.6/os.py", line 838, in _spawnvef
    raise ValueError('argv first element cannot be empty')
ValueError: argv first element cannot be empty
make[2]: Leaving directory '/builddir/build/BUILD/ghc-8.2.0.20170404/testsuite/timeout'
make[2]: *** [Makefile:54: calibrate.out] Error 1
make[1]: Leaving directory '/builddir/build/BUILD/ghc-8.2.0.20170404/testsuite/tests'
make[1]: *** [../mk/test.mk:293: ../timeout/install-inplace/bin/timeout] Error 2
make: *** [Makefile:217: test] Error 2

Full buildlog at https://copr-be.cloud.fedoraproject.org/results/petersen/ghc-8.2.1/fedora-26-x86_64/00536407-ghc/build.log.gz (for a couple of weeks)