diff --git a/src/api/call_fn.rs b/src/api/call_fn.rs
index 3774be31c..01dcdf20d 100644
--- a/src/api/call_fn.rs
+++ b/src/api/call_fn.rs
@@ -174,13 +174,13 @@ impl Engine {
         args.parse(&mut arg_values);
 
         self._call_fn(
+            options,
             scope,
-            &mut self.new_global_runtime_state(),
-            &mut Caches::new(),
             ast,
             name.as_ref(),
             arg_values.as_mut(),
-            options,
+            &mut self.new_global_runtime_state(),
+            &mut Caches::new(),
         )
         .and_then(|result| {
             result.try_cast_result().map_err(|r| {
@@ -206,22 +206,24 @@ impl Engine {
     #[inline(always)]
     pub(crate) fn _call_fn(
         &self,
+        options: CallFnOptions,
         scope: &mut Scope,
-        global: &mut GlobalRuntimeState,
-        caches: &mut Caches,
         ast: &AST,
         name: &str,
         arg_values: &mut [Dynamic],
-        options: CallFnOptions,
+        global: &mut GlobalRuntimeState,
+        caches: &mut Caches,
     ) -> RhaiResult {
         let statements = ast.statements();
 
+        let orig_source = mem::replace(&mut global.source, ast.source_raw().cloned());
+
         let orig_lib_len = global.lib.len();
+        global.lib.push(ast.shared_lib().clone());
 
         let orig_tag = options.tag.map(|v| mem::replace(&mut global.tag, v));
-        let mut this_ptr = options.this_ptr;
 
-        global.lib.push(ast.shared_lib().clone());
+        let mut this_ptr = options.this_ptr;
 
         #[cfg(not(feature = "no_module"))]
         let orig_embedded_module_resolver =
@@ -229,6 +231,16 @@ impl Engine {
 
         let rewind_scope = options.rewind_scope;
 
+        defer! { global => move |g| {
+            #[cfg(not(feature = "no_module"))]
+            {
+                g.embedded_module_resolver = orig_embedded_module_resolver;
+            }
+            if let Some(orig_tag) = orig_tag { g.tag = orig_tag; }
+            g.lib.truncate(orig_lib_len);
+            g.source = orig_source;
+        }}
+
         let global_result = if options.eval_ast && !statements.is_empty() {
             defer! {
                 scope if rewind_scope => rewind;
@@ -278,17 +290,6 @@ impl Engine {
             self.dbg(global, caches, scope, this_ptr, node)?;
         }
 
-        #[cfg(not(feature = "no_module"))]
-        {
-            global.embedded_module_resolver = orig_embedded_module_resolver;
-        }
-
-        if let Some(value) = orig_tag {
-            global.tag = value;
-        }
-
-        global.lib.truncate(orig_lib_len);
-
         result.map_err(|err| match *err {
             ERR::ErrorInFunctionCall(fn_name, _, inner_err, _) if fn_name == name => inner_err,
             _ => err,
diff --git a/src/api/deprecated.rs b/src/api/deprecated.rs
index 98fc181aa..755560312 100644
--- a/src/api/deprecated.rs
+++ b/src/api/deprecated.rs
@@ -177,13 +177,13 @@ impl Engine {
         };
 
         self._call_fn(
+            options,
             scope,
-            &mut self.new_global_runtime_state(),
-            &mut crate::eval::Caches::new(),
             ast,
             name.as_ref(),
             arg_values.as_mut(),
-            options,
+            &mut self.new_global_runtime_state(),
+            &mut crate::eval::Caches::new(),
         )
     }
     /// Register a custom fallible function with the [`Engine`].
diff --git a/tests/print.rs b/tests/print.rs
index 21657ab31..feb43fa95 100644
--- a/tests/print.rs
+++ b/tests/print.rs
@@ -1,4 +1,4 @@
-use rhai::{Engine, Scope, INT};
+use rhai::{Dynamic, Engine, Scope, INT};
 use std::sync::{Arc, RwLock};
 
 #[cfg(not(feature = "only_i32"))]
@@ -36,9 +36,10 @@ fn test_print_debug() {
     engine.run("print(40 + 2)").unwrap();
     let mut ast = engine.compile(r#"let x = "hello!"; debug(x)"#).unwrap();
     ast.set_source("world");
-    engine.run_ast(&ast).unwrap();
+    let r = engine.eval_ast::<Dynamic>(&ast).unwrap();
 
     // 'logbook' captures all the 'print' and 'debug' output
+    assert!(r.is_unit());
     assert_eq!(logbook.read().unwrap().len(), 2);
     assert_eq!(logbook.read().unwrap()[0], "entry: 42");
     assert_eq!(logbook.read().unwrap()[1], if cfg!(not(feature = "no_position")) { r#"DEBUG of world at 1:19: "hello!""# } else { r#"DEBUG of world at none: "hello!""# });