--- old/src/java.desktop/unix/classes/sun/awt/X11InputMethod.java	2018-12-04 10:44:21.006625854 +0900
+++ new/src/java.desktop/unix/classes/sun/awt/X11InputMethod.java	2018-12-04 10:44:20.596612775 +0900
@@ -55,7 +55,7 @@
      * 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. */