Ian This is 'sh validate" on 64bit Windows. Rather a lot of failures. Might you look? The perf tests seem to fail because it's comparing with the *32* bit numbers, even though this is definitely a *64* bit laptop. Whether the entire build system thinks it's a 32 bit machine, or just the testsuite, I can't tell. Thanks Simon Unexpected failures: cabal/cabal01 cabal01 [bad exit code] (normal) cabal/cabal04 cabal04 [bad exit code] (normal) driver dynHelloWorld [exit code non-0] (dyn) driver/dynamicToo dynamicToo002 [bad stdout] (normal) driver/dynamicToo dynamicToo003 [bad exit code] (normal) dynlibs T4464 [bad exit code] (normal) dynlibs T5373 [bad exit code] (normal) ghc-api/T7478 T7478 [bad exit code] (normal) ghci.debugger/scripts break008 [bad exit code] (ghci) ghci.debugger/scripts dynbrk009 [bad exit code] (ghci) ghci/scripts T5975a [bad stderr] (ghci) llvm/should_compile T5486 [exit code non-0] (optllvm) llvm/should_compile T5681 [exit code non-0] (optllvm) llvm/should_compile T6158 [exit code non-0] (optllvm) llvm/should_compile T7571 [exit code non-0] (optllvm) llvm/should_compile T7575 [exit code non-0] (optllvm) perf/compiler T1969 [stat not good enough] (normal) perf/compiler T3294 [stat not good enough] (normal) perf/compiler T4801 [stat too good] (normal) perf/haddock haddock.Cabal [stat not good enough] (normal) perf/haddock haddock.base [stat not good enough] (normal) perf/haddock haddock.compiler [stat not good enough] (normal) perf/should_run T7797 [stat too good] (normal) rts T4850 [bad stdout] (normal) rts derefnull [bad exit code] (normal) rts divbyzero [bad exit code] (normal) runghc T7859 [bad stderr] (normal) safeHaskell/check/pkg01 ImpSafeOnly01 [exit code non-0] (normal) safeHaskell/check/pkg01 ImpSafeOnly02 [exit code non-0] (normal) safeHaskell/check/pkg01 ImpSafeOnly03 [stderr mismatch] (normal) safeHaskell/check/pkg01 ImpSafeOnly04 [exit code non-0] (normal) safeHaskell/check/pkg01 ImpSafeOnly05 [stderr mismatch] (normal) safeHaskell/check/pkg01 ImpSafeOnly06 [exit code non-0] (normal) safeHaskell/check/pkg01 ImpSafeOnly07 [stderr mismatch] (normal) safeHaskell/check/pkg01 ImpSafeOnly08 [stderr mismatch] (normal) safeHaskell/check/pkg01 ImpSafeOnly09 [stderr mismatch] (normal) safeHaskell/check/pkg01 ImpSafeOnly10 [exit code non-0] (normal) safeHaskell/check/pkg01 safePkg01 [bad exit code] (normal)