--- old/src/java.desktop/unix/native/libawt_xawt/xawt/XlibWrapper.c	2018-11-26 16:07:36.872509181 +0530
+++ new/src/java.desktop/unix/native/libawt_xawt/xawt/XlibWrapper.c	2018-11-26 16:07:36.616637181 +0530
@@ -2183,7 +2183,7 @@
 JNIEXPORT jint JNICALL
 Java_sun_awt_X11_XlibWrapper_XSynchronize(JNIEnv *env, jclass clazz, jlong display, jboolean onoff)
 {
-    return (jint) XSynchronize((Display*)jlong_to_ptr(display), (onoff == JNI_TRUE ? True : False));
+    return (jint) ((intptr_t)XSynchronize((Display*)jlong_to_ptr(display), (onoff == JNI_TRUE ? True : False)));
 }
 
 JNIEXPORT jboolean JNICALL
@@ -2298,7 +2298,7 @@
         return;
     }
 
-    pRect = (RECT_T *)SAFE_SIZE_ARRAY_ALLOC(malloc, worstBufferSize, sizeof(RECT_T));
+    pRect = (RECT_T *)SAFE_SIZE_ARRAY_ALLOC(malloc, (jint)worstBufferSize, (int64_t)sizeof(RECT_T));
     if (!pRect) {
         return;
     }