Internal change.

PiperOrigin-RevId: 516635646
2 years ago · 5d97d43863
parent 6e6d0bce4a
commit 5d97d43863
1 changed files with 3 additions and 1 deletions
--- a/java/core/src/main/java/com/google/protobuf/UnknownFieldSetLite.java
+++ b/java/core/src/main/java/com/google/protobuf/UnknownFieldSetLite.java
@ -113,7 +113,9 @@ public final class UnknownFieldSetLite {
   * <p>Future calls to methods that attempt to modify this object will throw.
   */
  public void makeImmutable() {
-    this.isMutable = false;
+    if (this.isMutable) {
+      this.isMutable = false;
+    }
  }

  /** Throws an {@link UnsupportedOperationException} if immutable. */