Fix coverage of delayed nets

src/V3Scope.cpp

@@ -290,6 +290,7 @@ class ScopeVisitor final : public VNVisitor {
             m_varScopes.emplace(std::make_pair(nodep, m_scopep), varscp);
             m_scopep->addVarsp(varscp);
         }
+        iterateChildren(nodep);
     }
     void visit(AstVarRef* nodep) override {
         // VarRef needs to point to VarScope

test_regress/t/t_delay_var.v

@@ -17,8 +17,12 @@ module t;
    wire #PDLY d_param = in;
 
    initial begin
-      #2 in = 1'b0;
+      #2 in = 1'b1;
       #100;
+      if (d_const != 1) $stop;
+      if (d_int != 1) $stop;
+      if (d_real != 1) $stop;
+      if (d_param != 1) $stop;
       $write("*-* All Finished *-*\n");
       $finish;
    end