unconditionally exit mixin scope

src/parse/mixin.rs

@@ -145,10 +145,10 @@ impl<'a> Parser<'a> {
         .parse()?;
 
         self.content.pop();
+        self.scopes.exit_scope();
+
         if declared_at_root {
             mem::swap(self.scopes, self.content_scopes);
-        } else {
-            self.scopes.exit_scope();
         }
 
         Ok(body)

tests/mixins.rs

@@ -426,3 +426,26 @@ test!(
     }",
     "a {\n  color: 1rem;\n}\n"
 );
+test!(
+    can_access_global_variables_set_after_other_include,
+    "$x: true;
+
+    @mixin foobar() {
+        @if $x {
+            $x: false !global;
+            color: foo;
+        }
+
+        @else {
+            $x: true !global;
+            color: bar;
+        }
+    }
+
+    a {
+        @include foobar();
+        $x: true !global;
+        @include foobar();
+    }",
+    "a {\n  color: foo;\n  color: foo;\n}\n"
+);