Merge pull request #27 from Eliah-Lakhin/capturing-bug

Function names capturing as external variables bug

tests/closures.rs

@@ -38,7 +38,7 @@ fn test_fn_ptr_curry_call() -> Result<(), Box<EvalAltResult>> {
 #[cfg(not(feature = "no_closure"))]
 #[cfg(not(feature = "no_object"))]
 fn test_closures() -> Result<(), Box<EvalAltResult>> {
-    let engine = Engine::new();
+    let mut engine = Engine::new();
 
     assert_eq!(
         engine.eval::<INT>(
@@ -77,6 +77,23 @@ fn test_closures() -> Result<(), Box<EvalAltResult>> {
         "#
     )?);
 
+    let mut module = Module::new();
+
+    module.set_fn_1("plus_one", |x: INT| Ok(x + 1));
+
+    engine.load_package(module);
+
+    assert_eq!(
+        engine.eval::<INT>(
+            r#"
+                let a = 41;
+                let f = || plus_one(a);
+                f.call()
+            "#
+        )?,
+        42
+    );
+
     Ok(())
 }