Comment # 2 on bug 108 from Iain Buclaw

Looks like the frontend devs changed the behaviours of optimize/interpret,
again.  This'll need adding to the testsuite to catch any future changes.

*PATCH*
diff --git a/gcc/d/d-codegen.cc b/gcc/d/d-codegen.cc
index b0a50a4..a7acb92 100644
--- a/gcc/d/d-codegen.cc
+++ b/gcc/d/d-codegen.cc
@@ -830,8 +826,10 @@ build_attributes (Expressions *in_attrs)
   for (size_t i = 0; i < in_attrs->dim; i++)
     {
       Expression *attr = (*in_attrs)[i]->optimize (WANTexpand);
-      Dsymbol *sym = attr->type->toDsymbol (0);
+      if (attr->op == TOKcall)
+       attr = attr->ctfeInterpret();

+      Dsymbol *sym = attr->type->toDsymbol (0);
       if (!sym)
        continue;