reject non-toplevel import/export (#2128)

fixes #2124
2017-06-21 03:18:48 +08:00
parent 62d1fbf645
commit 11923e3ae8
5 changed files with 45 additions and 28 deletions
--- a/lib/scope.js
+++ b/lib/scope.js
@@ -223,6 +223,15 @@ AST_Toplevel.DEFMETHOD("figure_out_scope", function(options){
            }));
            node.thedef = sym;
        }
+        if (!(scope instanceof AST_Toplevel) && (node instanceof AST_Export || node instanceof AST_Import)) {
+            js_error(
+                node.TYPE + " statement may only appear at top level",
+                node.start.file,
+                node.start.line,
+                node.start.col,
+                node.start.pos
+            );
+        }

        function mark_export(def, level) {
            var node = tw.parent(level);