box_add.rb in vagrant-unbundled-1.8.5.1

- old
+ new

@@ -32,11 +32,11 @@
 
           url = Array(env[:box_url]).map do |u|
             u = u.gsub("\\", "/")
             if Util::Platform.windows? && u =~ /^[a-z]:/i
               # On Windows, we need to be careful about drive letters
-              u = "file://#{URI.escape(u)}"
+              u = "file:///#{URI.escape(u)}"
             end
 
             if u =~ /^[a-z0-9]+:.*$/i && !u.start_with?("file://")
               # This is not a file URL... carry on
               next u
@@ -470,9 +470,11 @@
           # by trying to parse JSON!
           uri = URI.parse(d.source)
           if uri.scheme == "file"
             url = uri.path
             url ||= uri.opaque
+            #7570 Strip leading slash left in front of drive letter by uri.path
+            Util::Platform.windows? && url.gsub!(/^\/([a-zA-Z]:)/, '\1')
 
             begin
               File.open(url, "r") do |f|
                 if f.size > METADATA_SIZE_LIMIT
                   # Quit early, don't try to parse the JSON of gigabytes