Catch :undefined_variable thrown when Future Parser is enabled with 3.7.x

lib/puppet/parser/functions/has_interface_with.rb

@@ -35,7 +35,13 @@ has_interface_with("lo")                        => true
 
     kind, value = args
 
-    if lookupvar(kind) == value
+    # Bug with 3.7.1 - 3.7.3  when using future parser throws :undefined_variable
+    # https://tickets.puppetlabs.com/browse/PUP-3597
+    factval = nil
+    catch :undefined_variable do
+      factval = lookupvar(kind)
+    end
+    if factval == value
       return true
     end
 
@@ -44,15 +50,17 @@ has_interface_with("lo")                        => true
       iface.downcase!
       factval = nil
       begin
+        # Bug with 3.7.1 - 3.7.3 when using future parser throws :undefined_variable
+        # https://tickets.puppetlabs.com/browse/PUP-3597
+        catch :undefined_variable do
           factval = lookupvar("#{kind}_#{iface}")
-      rescue Puppet::ParseError # Eat the exception if strict_variables = true is set
         end
         if value == factval
           result = true
-        break
+        end
+      rescue Puppet::ParseError # Eat the exception if strict_variables = true is set
       end
     end
-
     result
   end
 end