I had checked out D5067 at https://phabricator.haskell.org/D5067?id=19263 with

arc patch D5067

Then I ran

env THREADS=9 ./validate

and got a few test failures.

When I then ran

env THREADS=9 ./validate --slow

I got the following error:

/usr/bin/install -c -m 755 -d  "/home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105/rts"
for i in  rts/dist/build/libHSrts.a rts/dist/build/libHSrts_p.a rts/dist/build/libHSrts-ghc8.7.20190105.so rts/dist/build/libHSrts_l.a rts/dist/build/libHSrts_debug.a rts/dist/build/libHSrts_thr.a rts/dist/build/libHSrts_thr_debug.a rts/dist/build/libHSrts_thr_l.a rts/dist/build/libHSrts_thr_p.a rts/dist/build/libHSrts_debug-ghc8.7.20190105.so rts/dist/build/libHSrts_thr-ghc8.7.20190105.so rts/dist/build/libHSrts_thr_debug-ghc8.7.20190105.so rts/dist/build/libHSrts_l-ghc8.7.20190105.so rts/dist/build/libHSrts_thr_l-ghc8.7.20190105.so rts/dist/build/libHSrts_thr_debug_p.a rts/dist/build/libHSrts_debug_p.a rts/dist/build/libffi.so.7.1.0 rts/dist/build/libffi.so.7 rts/dist/build/libffi.so rts/dist/build/libCffi.a rts/dist/build/libCffi_p.a rts/dist/build/libCffi_l.a rts/dist/build/libCffi_debug.a rts/dist/build/libCffi_thr.a rts/dist/build/libCffi_thr_debug.a rts/dist/build/libCffi_thr_l.a rts/dist/build/libCffi_thr_p.a rts/dist/build/libCffi_thr_debug_p.a rts/dist/build/libCffi_debug_p.a; do case $i in *.a) /usr/bin/install -c -m 644  $i  "/home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105/rts"; true  "/home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105/rts"/`basename $i` ;; *.dll) /usr/bin/install -c -m 755  $i  "/home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105/rts" ; strip  "/home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105/rts"/`basename $i` ;; *.so) /usr/bin/install -c -m 755  $i  "/home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105/rts" ;; *.dylib) /usr/bin/install -c -m 755  $i  "/home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105/rts";; *) /usr/bin/install -c -m 644  $i  "/home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105/rts"; esac; done
"utils/ghc-cabal/dist-install/build/tmp/ghc-cabal-bindist" copy libraries/ghc-prim dist-install "strip" '' '/home/simon/src/ghc-validate/bindisttest/install   dir' '/home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105' '/home/simon/src/ghc-validate/bindisttest/install   dir/share/doc/ghc-8.7.20190105/html/libraries' 'v p dyn'  
Installing library in /home/simon/src/ghc-validate/bindisttest/install   dir/lib/ghc-8.7.20190105/ghc-prim-0.5.3
dist-install/build/HSghc-prim-0.5.3.o: copyFile: does not exist (No such file or directory)
ghc.mk:986: recipe for target 'install_packages' failed
make[3]: *** [install_packages] Error 1
Makefile:51: recipe for target 'install' failed
make[2]: *** [install] Error 2
bindisttest/ghc.mk:21: recipe for target 'test_bindist' failed
make[1]: *** [test_bindist] Error 2
Makefile:123: recipe for target 'test_bindist' failed
make: *** [test_bindist] Error 2