Use actual outer scope for function-bang calls.

tests/functions.rs

@@ -164,5 +164,22 @@ fn test_functions_bang() -> Result<(), Box<EvalAltResult>> {
         165
     );
 
+    assert_eq!(
+        engine.eval::<INT>(
+            "
+                fn foo() {
+                    hello = 0;
+                    hello + bar
+                }
+
+                let hello = 42;
+                let bar = 123;
+
+                foo!()
+            ",
+        )?,
+        123
+    );
+
     Ok(())
 }

tests/internal_fn.rs

@@ -204,8 +204,7 @@ fn test_function_pointers() -> Result<(), Box<EvalAltResult>> {
 }
 
 #[test]
-#[cfg(not(feature = "no_closure"))]
-fn test_internal_fn_captures() -> Result<(), Box<EvalAltResult>> {
+fn test_internal_fn_bang() -> Result<(), Box<EvalAltResult>> {
     let engine = Engine::new();
 
     assert_eq!(
@@ -219,7 +218,7 @@ fn test_internal_fn_captures() -> Result<(), Box<EvalAltResult>> {
                 foo!(1) + x
             "
         )?,
-        83
+        84
     );
 
     assert!(engine