diff --git a/services/core/java/com/android/server/wm/WindowContainer.java b/services/core/java/com/android/server/wm/WindowContainer.java
index f4a1765d46636..510e6756b8ef0 100644
--- a/services/core/java/com/android/server/wm/WindowContainer.java
+++ b/services/core/java/com/android/server/wm/WindowContainer.java
@@ -3839,7 +3839,8 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
             // This can still happen if WMCore starts a new transition when there is ongoing
             // sync transaction from Shell. Please file a bug if it happens.
             throw new IllegalStateException("Can't sync on 2 groups simultaneously"
-                    + " currentSyncId=" + mSyncGroup.mSyncId + " newSyncId=" + group.mSyncId);
+                    + " currentSyncId=" + mSyncGroup.mSyncId + " newSyncId=" + group.mSyncId
+                    + " wc=" + this);
         }
         mSyncGroup = group;
     }