Fixed a very nasty deadlock

examples/hello-world/main.orc

@@ -1,5 +1,7 @@
-let user = "lorinc" + " " + "bethlenfalvy"
+let user = string::concat "lorinc" (string::concat " " "bethlenfalvy")
 let number = 1 + 2
 let interpolated = "Hello $user $number"
 
-let user = 
+let user = r[ "foo" 1, "bar" 3 ]
+let ffmain = user . "foo" |> option::expect "missing value"
+let main = 1