ffi-1.9.9 segfaults on windows #440 causes vagrant not to wo

Sorry for the trouble here - it looks like FFI [had a bad release on Friday]https://github.com/ffi/ffi/issues/440) that they're still figuring out. Unfortunately this interacts with a bug in Vagrant's version of Bundler which causes plugin installs to incorrectly pull down the latest versions of gems that are already bundled with vagrant.

If you run these commands in Powershell to remove the downloaded FFI gem, Vagrant will fall back to the built-in version:

rm -Recurse -Force ~\.vagrant.d\gems\gems\ffi-1.9.9-x86-mingw32
rm -Recurse -Force ~\.vagrant.d\gems\specifications\ffi-1.9.9-x86-mingw32.gemspec
Let me know if this takes care of the problem for you,

rm -Recurse -Force D:\HashiCorp\Vagrant\home\gems\gems\ffi-1.9.9-x86-mingw32
rm -Recurse -Force D:\HashiCorp\Vagrant\home\gems\specifications\ffi-1.9.9-x86-mingw32.gemspec