Is it that

Author: mgreter

src/environment.cpp

@@ -59,12 +59,8 @@ namespace Sass {
     // profiling only show a very minor increase (but keep anyway).
     if (a->vidx().isValid()) {
       assigne = &compiler.varRoot.getVariable(a->vidx());
-      ValueObj result = a->value()->accept(this);
-      compiler.varRoot.setVariable(
-        a->vidx(),
-        result,
-        false);
-      assigne = nullptr;
+      compiler.varRoot.setVariable(a->vidx(),
+        a->value()->accept(this), a->is_default());
       return nullptr;
     }