providers/virtualbox: interpolation added to error [GH-5308]

CHANGELOG.md

@@ -30,6 +30,7 @@ BUG FIXES:
   - providers/hyperv: allow users to configure memory, cpu count, and vmname [GH-5183]
   - providers/hyperv: import respects secure boot. [GH-5209]
   - providers/virtualbox: read netmask from dhcpservers [GH-5233]
+  - providers/virtualbox: Fix exception when VirtualBox version is empty. [GH-5308]
   - provisioners/ansible: fix SSH settings to support more than 5 ssh keys [GH-5017]
   - provisioners/ansible: increase ansible connection timeout to 30 seconds [GH-5018]
   - provisioners/docker: Only add docker user to group if exists. [GH-5315]

plugins/providers/virtualbox/driver/meta.rb

@@ -152,7 +152,8 @@ module VagrantPlugins
               # This seems to happen on Windows for uncertain reasons.
               # Raise an error otherwise the error is that they have an
               # incompatible version of VirtualBox which isn't true.
-              raise Vagrant::Errors::VirtualBoxVersionEmpty
+              raise Vagrant::Errors::VirtualBoxVersionEmpty,
+                vboxmanage: @vboxmanage_path.to_s
             end
           end