src/java.desktop/unix/classes/sun/awt/X11InputMethod.java

@@ -53,11 +53,11 @@
 
     /**
      * Reset the composition state to the current composition state.
      */
     protected void resetCompositionState() {
-        if (compositionEnableSupported) {
+        if (compositionEnableSupported && haveActiveClient()) {
             try {
                 /* Restore the composition mode to the last saved composition
                    mode. */
                 setCompositionEnabled(savedCompositionState);
             } catch (UnsupportedOperationException e) {