Fix loss of V3Simulate on expression statements.

src/V3Simulate.h

@@ -863,6 +863,12 @@ private:
 
     void visit(AstComment*) override {}
 
+    void visit(AstStmtExpr* nodep) override {
+        if (jumpingOver(nodep)) return;
+        checkNodeInfo(nodep);
+        iterateChildren(nodep);
+    }
+
     void visit(AstJumpBlock* nodep) override {
         if (jumpingOver(nodep)) return;
         iterateChildren(nodep);

test_regress/t/t_assert_disable_bad.out

@@ -2,4 +2,6 @@
                                       : ... In instance t
    27 |    assert property (disable iff (val == 0) check(1, 1));
       |                                      ^~
-%Error: Exiting due to
+%Error: Internal Error: t/t_assert_disable_bad.v:21:7: ../V3Ast.cpp:#: Adding to non-empty, non-list op2
+   21 |       @(posedge clk)
+      |       ^