Running Vagrant 1.1.0 - adding a line like the following (pulled from the docs) in my Vagrantfile:
myinstance.vm.synced_folder = "/home/vagrant/myfiles", "~/git/myfiles"
Throws this error:
Vagrantfile:125:in `block (2 levels) in <top (required)>': undefined method `synced_folder=' for #<VagrantPlugins::Kernel_V1::VMConfig:0x00000103368e00> (NoMethodError)
Reverting the line to the old share_folder method works:
myinstance.vm.share_folder("myfiles", "/home/vagrant/myfiles", "~/git/myfiles")
The = is a typo :) Don't use that.