Tamar Thank you! Yes, it's in c:/msys64 Since I wrote more odd things have happened. 1. I just left the machine for 10-15 mins and lo! the shell windows opened up. It just took a loooong time. At this point, starting a new shell no longer took a long time. It all seemed to be working. 2. I then ran pacman -Syuu as instructed on the installation page: https://sourceforge.net/p/msys2/wiki/MSYS2%20installation/ The log of what happened is below. There are numerous failures involving Cygwin, which I do not have installed, at least not so far as I know. I do not know if these failures matter. 3. After this step, starting a shell failed altogether with "c:/msys64/mingw64_shell.bat is not recognised as an internal or external command". And sure enough, there is no such file. Presumably it existed in step 1. So perhaps step 2 deleted it? 4. As you mention, I then tried msys2_shell.cmd. It worked -- with a noticeable delay of 5 seconds or so. So I'm less stuck than before but * should I worry about all those install errs * how can I debug what's happening with that long delay * Should I nuke the start menu shortcuts that the msys64 installer so carefully installed in favour of msys2_shell.cmd? Thanks Simon pacman -Syuu :: Synchronising package databases... mingw32 277.4 KiB 501K/s 00:01 [#####################] 100% mingw32.sig 96.0 B 0.00B/s 00:00 [#####################] 100% mingw64 277.0 KiB 481K/s 00:01 [#####################] 100% mingw64.sig 96.0 B 0.00B/s 00:00 [#####################] 100% msys 134.9 KiB 2014K/s 00:00 [#####################] 100% msys.sig 96.0 B 0.00B/s 00:00 [#####################] 100% :: Starting full system upgrade... :: Replace repman-git with msys/pactoys-git? [Y/n] y resolving dependencies... looking for conflicting packages... Packages (41) bash-completion-2.3-1 bsdcpio-3.2.0-1 bsdtar-3.2.0-1 coreutils-8.25-1 crypt-1.3-1 curl-7.49.1-1 file-5.25-1 filesystem-2016.05-3 gcc-libs-5.3.0-3 gettext-0.19.7-3 gmp-6.1.0-2 gnupg-1.4.20-1 grep-2.22-3 gzip-1.7-1 heimdal-libs-1.5.3-9 libarchive-3.2.0-1 libasprintf-0.19.7-3 libassuan-2.4.2-1 libcrypt-1.3-1 libcurl-7.49.1-1 libexpat-2.1.1-1 libgettextpo-0.19.7-3 libgpg-error-1.21-1 libgpgme-1.6.0-1 libintl-0.19.7-3 liblzma-5.2.2-1 libnettle-3.2-1 libopenssl-1.0.2.h-1 libssh2-1.7.0-1 mintty-1~2.2.3-1 mpfr-3.1.4-1 msys2-launcher-git-0.3.29.4028b6c-1 msys2-runtime-2.5.1-1 ncurses-6.0.20160220-1 openssl-1.0.2.h-1 pacman-5.0.1.6403.520736d-1 pactoys-git-r1.e58a7ac-1 rebase-4.4.2-1 repman-git-r23.87bf865-1 [removal] wget-1.17.1-3 xz-5.2.2-1 Total Download Size: 24.85 MiB Total Installed Size: 124.28 MiB Net Upgrade Size: 6.09 MiB :: Proceed with installation? [Y/n] y :: Retrieving packages ... msys2-runtime-2.5.1... 2.2 MiB 912K/s 00:03 [#####################] 100% bash-completion-2.3... 184.1 KiB 4.50M/s 00:00 [#####################] 100% gcc-libs-5.3.0-3-x86_64 783.6 KiB 1818K/s 00:00 [#####################] 100% libintl-0.19.7-3-x86_64 25.6 KiB 3.13M/s 00:00 [#####################] 100% libgettextpo-0.19.7... 110.7 KiB 3.60M/s 00:00 [#####################] 100% libasprintf-0.19.7-... 11.8 KiB 1686K/s 00:00 [#####################] 100% gettext-0.19.7-3-x86_64 1524.1 KiB 1774K/s 00:01 [#####################] 100% liblzma-5.2.2-1-x86_64 76.6 KiB 6.23M/s 00:00 [#####################] 100% gmp-6.1.0-2-x86_64 369.2 KiB 2.03M/s 00:00 [#####################] 100% libnettle-3.2-1-x86_64 101.1 KiB 5.20M/s 00:00 [#####################] 100% coreutils-8.25-1-x86_64 2.2 MiB 1794K/s 00:01 [#####################] 100% ncurses-6.0.2016022... 1147.2 KiB 1833K/s 00:01 [#####################] 100% bsdcpio-3.2.0-1-x86_64 747.1 KiB 2.08M/s 00:00 [#####################] 100% bsdtar-3.2.0-1-x86_64 785.4 KiB 1879K/s 00:00 [#####################] 100% libcrypt-1.3-1-x86_64 13.5 KiB 1692K/s 00:00 [#####################] 100% crypt-1.3-1-x86_64 13.9 KiB 1979K/s 00:00 [#####################] 100% libopenssl-1.0.2.h-... 803.0 KiB 1921K/s 00:00 [#####################] 100% heimdal-libs-1.5.3-... 592.7 KiB 1976K/s 00:00 [#####################] 100% openssl-1.0.2.h-1-x... 1354.4 KiB 1929K/s 00:01 [#####################] 100% gzip-1.7-1-x86_64 97.0 KiB 3.16M/s 00:00 [#####################] 100% libssh2-1.7.0-1-x86_64 170.7 KiB 2.69M/s 00:00 [#####################] 100% libexpat-2.1.1-1-x86_64 56.9 KiB 3.27M/s 00:00 [#####################] 100% libcurl-7.49.1-1-x86_64 191.1 KiB 1855K/s 00:00 [#####################] 100% curl-7.49.1-1-x86_64 608.4 KiB 627K/s 00:01 [#####################] 100% file-5.25-1-x86_64 396.5 KiB 352K/s 00:01 [#####################] 100% filesystem-2016.05-... 36.3 KiB 1297K/s 00:00 [#####################] 100% gnupg-1.4.20-1-x86_64 1026.9 KiB 1927K/s 00:01 [#####################] 100% grep-2.22-3-x86_64 230.3 KiB 2.29M/s 00:00 [#####################] 100% libarchive-3.2.0-1-... 743.4 KiB 2.09M/s 00:00 [#####################] 100% mintty-1~2.2.3-1-x86_64 147.2 KiB 4.64M/s 00:00 [#####################] 100% mpfr-3.1.4-1-x86_64 238.5 KiB 1099K/s 00:00 [#####################] 100% msys2-launcher-git-... 28.5 KiB 2037K/s 00:00 [#####################] 100% xz-5.2.2-1-x86_64 142.5 KiB 3.87M/s 00:00 [#####################] 100% pacman-5.0.1.6403.5... 6.8 MiB 1776K/s 00:04 [#####################] 100% rebase-4.4.2-1-x86_64 236.4 KiB 1487K/s 00:00 [#####################] 100% libgpg-error-1.21-1... 103.8 KiB 3.38M/s 00:00 [#####################] 100% libassuan-2.4.2-1-x... 91.7 KiB 4.71M/s 00:00 [#####################] 100% libgpgme-1.6.0-1-x86_64 175.7 KiB 4.09M/s 00:00 [#####################] 100% wget-1.17.1-3-x86_64 570.7 KiB 2.04M/s 00:00 [#####################] 100% pactoys-git-r1.e58a... 27.7 KiB 3.00M/s 00:00 [#####################] 100% (40/40) checking keys in keyring [#####################] 100% (40/40) checking package integrity [#####################] 100% (40/40) loading package files [#####################] 100% (40/40) checking for file conflicts [#####################] 100% (41/41) checking available disk space [#####################] 100% warning: could not get file information for mingw32/ warning: could not get file information for mingw32/bin/ warning: could not get file information for mingw32/etc/ warning: could not get file information for mingw32/include/ warning: could not get file information for mingw32/lib/ warning: could not get file information for mingw32/share/ warning: could not get file information for mingw64/ warning: could not get file information for mingw64/bin/ warning: could not get file information for mingw64/etc/ warning: could not get file information for mingw64/include/ warning: could not get file information for mingw64/lib/ warning: could not get file information for mingw64/share/ warning: could not get file information for opt/ warning: could not get file information for mingw32.exe warning: could not get file information for mingw32.ini warning: could not get file information for mingw64.exe warning: could not get file information for mingw64.ini warning: could not get file information for msys2.exe warning: could not get file information for msys2.ini warning: could not get file information for autorebasebase1st.bat :: Processing package changes... (1/1) removing repman-git [#####################] 100% ( 1/40) upgrading msys2-runtime [#####################] 100% ( 2/40) upgrading bash-completion [#####################] 100% ( 3/40) upgrading gcc-libs [#####################] 100% 3 [main] pacman (8492) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 0 [main] pacman 6424 fork: child -1 - forked process 8492 died unexpectedl y, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) ( 4/40) upgrading libintl [#####################] 100% ( 5/40) upgrading libgettextpo [#####################] 100% ( 6/40) upgrading libasprintf [#####################] 100% ( 7/40) upgrading gettext [#####################] 100% 1 [main] pacman (700) C:\msys64\usr\bin\pacman.exe: *** fatal error - cygh eap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 1793360 [main] pacman 6424 fork: child -1 - forked process 700 died unexpectedly , retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) ( 8/40) upgrading liblzma [#####################] 100% ( 9/40) upgrading gmp [#####################] 100% 1 [main] pacman (3128) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 1942064 [main] pacman 6424 fork: child -1 - forked process 3128 died unexpectedl y, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) (10/40) upgrading libnettle [#####################] 100% (11/40) upgrading coreutils [#####################] 100% 1 [main] pacman (3376) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 4846481 [main] pacman 6424 fork: child -1 - forked process 3376 died unexpectedl y, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) (12/40) upgrading ncurses [#####################] 100% (13/40) upgrading bsdcpio [#####################] 100% (14/40) upgrading bsdtar [#####################] 100% (15/40) upgrading libcrypt [#####################] 100% (16/40) upgrading crypt [#####################] 100% (17/40) upgrading libopenssl [#####################] 100% (18/40) upgrading heimdal-libs [#####################] 100% (19/40) upgrading openssl [#####################] 100% (20/40) upgrading gzip [#####################] 100% 1 [main] pacman (1752) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 24726165 [main] pacman 6424 fork: child -1 - forked process 1752 died unexpected ly, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) (21/40) upgrading libssh2 [#####################] 100% (22/40) upgrading libexpat [#####################] 100% (23/40) upgrading libcurl [#####################] 100% (24/40) upgrading curl [#####################] 100% (25/40) upgrading file [#####################] 100% (26/40) upgrading filesystem [#####################] 100% 1 [main] pacman (6260) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 27083623 [main] pacman 6424 fork: child -1 - forked process 6260 died unexpected ly, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) (27/40) upgrading gnupg [#####################] 100% 1 [main] pacman (852) C:\msys64\usr\bin\pacman.exe: *** fatal error - cygh eap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 27485279 [main] pacman 6424 fork: child -1 - forked process 852 died unexpectedl y, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) (28/40) upgrading grep [#####################] 100% 2 [main] pacman (3868) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 27800784 [main] pacman 6424 fork: child -1 - forked process 3868 died unexpected ly, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) (29/40) upgrading libarchive [#####################] 100% (30/40) upgrading mintty [#####################] 100% (31/40) upgrading mpfr [#####################] 100% 1 [main] pacman (4728) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 28144605 [main] pacman 6424 fork: child -1 - forked process 4728 died unexpected ly, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) (32/40) upgrading msys2-launcher-git [#####################] 100% (33/40) upgrading xz [#####################] 100% (34/40) upgrading pacman [#####################] 100% (35/40) upgrading rebase [#####################] 100% (36/40) installing libgpg-error [#####################] 100% (37/40) installing libassuan [#####################] 100% 1 [main] pacman (4672) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 31924467 [main] pacman 6424 fork: child -1 - forked process 4672 died unexpected ly, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) (38/40) installing libgpgme [#####################] 100% 1 [main] pacman (5432) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 32015724 [main] pacman 6424 fork: child -1 - forked process 5432 died unexpected ly, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) (39/40) installing wget [#####################] 100% 1 [main] pacman (9128) C:\msys64\usr\bin\pacman.exe: *** fatal error - cyg heap base mismatch detected - 0x180326400/0x18033A400. This problem is probably due to using incompatible versions of the cygwin DLL. Search for cygwin1.dll using the Windows Start->Find/Search facility and delete all but the most recent version. The most recent version *should* reside in x:\cygwin\bin, where 'x' is the drive on which you have installed the cygwin distribution. Rebooting is also suggested if you are unable to find another cygwin DLL. 32712616 [main] pacman 6424 fork: child -1 - forked process 9128 died unexpected ly, retry 0, exit code 0xC0000142, errno 11 error: could not fork a new process (Resource temporarily unavailable) Optional dependencies for wget ca-certificates: HTTPS downloads [installed] (40/40) installing pactoys-git [#####################] 100% -----Original Message----- From: Tamar Christina [mailto:tamar@zhox.com] Sent: 27 June 2016 09:19 To: Simon Peyton Jones Cc: ghc-devs@haskell.org Subject: Re: msys2 64 bit: help help! Hi Simon, Did you install it to the default location (C:\Msys64) or to a location with spaces in the path? The Msys2 stuff is quite particular about spaces in the path. If that's not the case, then in the install location of msys2 you should find 3 batch files (mingw32.bat, mingw64.bat and msys2_shell.bat) If you only have the msys2_shell.bat use that one instead of mingw64.bat (msys2 in an update will change the shortcuts so I am not sure if the update was done already on your install). Open a command-line window and run that batch file. It should then show you the error without closing the window. alternatively, you can try starting bash in cmd instead of mitty, using "set MSYSTEM=MINGW64 && E:\msys64 E:\msys64\usr\bin\bash --login" replacing the path with your install path. Let me know if these don't work. Kind Regards, Tamar 3 batch files ---- On Mon, 27 Jun 2016 10:01:28 +0200 Simon Peyton Jones wrote ----

Friends, esp Tamar,

I am in happy possession of a new Surface Book, running Windows 10, which is delightful – except that I can’t make the msys64 installation work, which is crucial for GHC. Can any of you help?

· I install it from here: https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fsourceforge.net%2fp%2fmsys2%2fwiki%2fMSYS2%2520installation%2f&data=01%7c01%7csimonpj%40064d.mgd.microsoft.com%7c2801115a7b2e43ebd2da08d39e63ba89%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata=qXzbQdt3AGrhl3oL48tbGsUgpz%2b6q9uCCMrlfn145Wg%3d, which seems to be the canonical place. The actual 64-bit exe seems to be msys2-x86_64-20160205.exe. · Installation goes fine · But when I launch the “MinGW-w54 Win64 shell” from the Start menu, the screen flashes as if it is briefly putting up a window, but then the window disappears. · Each time I do this the task manager shows that there is another running ‘mintty.exe’. But it has no visible window

Does anyone have any idea what I can do or how I can investigate? I can’t do any GHC development without this!

Thanks

Simon