src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.virtual/src/org/graalvm/compiler/virtual/phases/ea/EffectList.java

@@ -169,13 +169,18 @@
     public boolean isEmpty() {
         return size == 0;
     }
 
     public void apply(StructuredGraph graph, ArrayList<Node> obsoleteNodes, boolean cfgKills) {
+        boolean message = false;
         for (int i = 0; i < size(); i++) {
             Effect effect = effects[i];
             if (effect.isCfgKill() == cfgKills) {
+                if (!message) {
+                    message = true;
+                    debug.log(cfgKills ? " ==== cfg kill effects" : " ==== effects");
+                }
                 try {
                     effect.apply(graph, obsoleteNodes);
                 } catch (Throwable t) {
                     StringBuilder str = new StringBuilder();
                     toString(str, i);

@@ -200,11 +205,11 @@
                 Object object = field.get(effect);
                 if (object == this) {
                     // Inner classes could capture the EffectList itself.
                     continue;
                 }
-                str.append(first ? "" : ", ").append(format(object));
+                str.append(first ? "" : ", ").append(field.getName()).append("=").append(format(object));
                 first = false;
             } catch (SecurityException | IllegalAccessException e) {
                 throw new RuntimeException(e);
             }
         }