title: MSYS2/pacman can't run update-core or sync database "filename too long" error
body: <p>I'm attempting to install and use MSYS2 (just getting started with it). I used the installer msys2-x86_64-20150916.exe and that seemed to go fine. Following the <a href="http://sourceforge.net/p/msys2/wiki/MSYS2%20installation/" rel="nofollow">install</a> directions, I ran both the update-core script and package database sync. Both fail. I show some of the output of the update core script below. The database sync fails for same "filename too long" reasons.</p>
  
  <pre><code>==&gt; Update package databases...
  :: Synchronizing package databases...
  downloading mingw32.db...
  downloading mingw32.db...
  downloading mingw32.db...
  downloading mingw32.db...
  downloading mingw32.db...
  
  error: could not open file /var/lib/pacman/sync/process?a=-3-lqCLzXmOVMGhdCngyCV4_GayxZ9J_5BY5vi5g3cT8TnaVOyHNkP3i0c8d5C4blqAp5pNlE0ed_vEU-kPSDHKOg&amp;b=PPNTxJgmwuDT5DPf_2sovf-m6J5IoL2zxXU84ePhgAUcZBDyVD_v4wfG6xGP3FZCi8b3EStJPpKrKU8ykIp4uPYrbGFuUlsd-FOf5alMDNO2Olf-YFTsRpUe24Yfq_ATwekjooJm-B-XXCVQ1YAE-3RUWx6oUzFYRJU02LpZIsToFNPuxq-KAou5Jn0dv8rnnKahdjG5tC2rTNNj4gWmj4P_9EX4TcaNgFcSKXzudqLljMnXiamdT4NGmqOPl_cDHrPSnLGDHLWoQHEqx1lL22LYPuzY135OpobhnKym1KM1DLksJiU3U9CwbJ7-2dUD2k1mXjQYV6qGC0I6VRGIkmjkOUCiGsiLMlz-OnHKs_CgI0NyreR38yFPfW6pnW4skarOGfYj0p9pp2MMCMeXtQF6XDDZs3Hah8QoEBL8ZQjD9pArAbk34E9jUIgJXG4I&amp;blockedUrl=http%3A%2F%2Frepo.msys2.org%2Fmingw%2Fi686%2Fmingw32.db.sig.part: File name too long
  
  ...
  
  ==&gt; Checking if there are critical packages to upgrade.
  error: could not open file /var/lib/pacman/sync/mingw32.db: Unrecognized archive format
  
  ...
  </code></pre>
  
  <p>I am running on Windows 7 Enterprise. </p>