bugfix: resolve with macro with call after caller

https://github.com/askama-rs/askama/issues/467

Signed-off-by: Michael Pollind <mpollind@gmail.com>

askama_derive/src/generator/node.rs

@@ -779,7 +779,7 @@ impl<'a> Generator<'a, '_> {
         })?;
         self.prepare_ws(ws2);
         self.seen_callers.pop();
-        self.active_caller = None;
+        self.active_caller = self.seen_callers.last().map(|v| v.0);
         Ok(size_hint)
     }
 

testing/tests/macro.rs

@@ -254,6 +254,27 @@ fn test_caller_expr() {
     assert_eq!(MacroCallerExpr.render().unwrap(), "20 1 35\n");
 }
 
+#[test]
+fn test_caller_in_macro_call_before_caller() {
+    #[derive(Template)]
+    #[template(
+        source = r#"
+            {%- macro test2() -%}
+                a
+                {{- caller() -}}
+            {%- endmacro -%}
+            {%- macro test() -%}
+               {%- call test2() -%}b{%- endcall -%}
+               {{- caller() -}}
+            {%- endmacro -%}
+            {%- call test() -%}{%- call test2() -%}b{%- endcall -%}{%- endcall -%}
+        "#,
+        ext = "txt"
+    )]
+    struct CallerWithMacro;
+    assert_eq!(CallerWithMacro.render().unwrap(), "abab");
+}
+
 #[test]
 fn test_caller_in_caller() {
     #[derive(Template)]