variables declared in mixins can be accessed after @content

src/parse/mixin.rs

@@ -190,7 +190,7 @@ impl<'a> Parser<'a> {
             }
         }
 
-        Ok(if let Some(content) = &self.content.pop() {
+        Ok(if let Some(content) = self.content.pop() {
             let stmts = if let Some(body) = content.content.clone() {
                 Parser {
                     toks: &mut body.into_iter().peekmore(),
@@ -212,8 +212,9 @@ impl<'a> Parser<'a> {
             } else {
                 Vec::new()
             };
-            self.content.push(content.clone());
-            self.scopes.exit_scope();
+
+            self.content.push(content);
+
             stmts
         } else {
             Vec::new()

src/scope.rs

@@ -105,7 +105,7 @@ impl Scopes {
         if let Some(scope) = self.0.last_mut() {
             scope.merge(other)
         } else {
-            panic!()
+            self.0.push(other)
         }
     }
 }

tests/mixins.rs

@@ -449,6 +449,22 @@ test!(
     }",
     "a {\n  color: foo;\n  color: foo;\n}\n"
 );
+test!(
+    can_access_variables_declared_before_content,
+    "@mixin foo {  
+        $a: red;
+
+        @content;
+
+        color: $a;
+    }
+
+
+    a {
+      @include foo;
+    }",
+    "a {\n  color: red;\n}\n"
+);
 error!(
     mixin_in_function,
     "@function foo() {