From 6aa5c1a008fc7ed2c47dba00b45ab82b66c53b3e Mon Sep 17 00:00:00 2001
From: Chris Roberts <croberts@hashicorp.com>
Date: Fri, 6 Jul 2018 14:29:32 -0700
Subject: [PATCH 1/2] Always force string type conversion of path

Fixes #9984
---
 lib/vagrant/util/platform.rb            | 5 +++--
 test/unit/vagrant/util/platform_test.rb | 4 ++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/vagrant/util/platform.rb b/lib/vagrant/util/platform.rb
index 789d61ece..20a389d3e 100644
--- a/lib/vagrant/util/platform.rb
+++ b/lib/vagrant/util/platform.rb
@@ -392,8 +392,9 @@ module Vagrant
         # @param [String, Pathname] path Path to convert
         # @return [String]
         def wsl_to_windows_path(path)
+          path = path.to_s
           if wsl? && wsl_windows_access? && !path.match(/^[a-zA-Z]:/)
-            path = File.expand_path(path.to_s)
+            path = File.expand_path(path)
             if wsl_path?(path)
               parts = path.split("/")
               parts.delete_if(&:empty?)
@@ -405,7 +406,7 @@ module Vagrant
               end
               path = [root_path, *parts].join("\\")
             else
-              path = path.to_s.sub("/mnt/", "")
+              path = path.sub("/mnt/", "")
               parts = path.split("/")
               parts.first << ":"
               path = parts.join("\\")
diff --git a/test/unit/vagrant/util/platform_test.rb b/test/unit/vagrant/util/platform_test.rb
index f43afd1d8..396148839 100644
--- a/test/unit/vagrant/util/platform_test.rb
+++ b/test/unit/vagrant/util/platform_test.rb
@@ -353,6 +353,10 @@ describe Vagrant::Util::Platform do
             it "should include rootfs when accessing non-home path" do
               expect(subject.wsl_to_windows_path("/tmp/test")).to include("rootfs")
             end
+
+            it "should properly handle Pathname" do
+              expect(subject.wsl_to_windows_path(Pathname.new("/tmp/test"))).to include("rootfs")
+            end
           end
         end
       end

From 6f81d16691543c544b7a44164b477a27ffafd650 Mon Sep 17 00:00:00 2001
From: Chris Roberts <croberts@hashicorp.com>
Date: Thu, 12 Jul 2018 16:49:22 -0700
Subject: [PATCH 2/2] Remove final #to_s on path

---
 lib/vagrant/util/platform.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vagrant/util/platform.rb b/lib/vagrant/util/platform.rb
index 20a389d3e..e1f2ea29c 100644
--- a/lib/vagrant/util/platform.rb
+++ b/lib/vagrant/util/platform.rb
@@ -412,7 +412,7 @@ module Vagrant
               path = parts.join("\\")
             end
           end
-          path.to_s
+          path
         end
 
         # Takes a windows path and formats it to the