add a couple of test cases to NullPointer.java

test/NullPointer.java

@@ -2,10 +2,33 @@ public class NullPointer {
   private int x;
   private Object y;
 
+  private static void throw_(Object o) {
+    o.toString();
+  }
+
+  private static void throwAndCatch(Object o) {
+    try {
+      o.toString();
+      throw new RuntimeException();
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+  }
+
   public static void main(String[] args) {
+    try {
+      throw_(null);
+      throw new RuntimeException();
+    } catch (NullPointerException e) {
+      e.printStackTrace();
+    }
+
+    throwAndCatch(null);
+
     // invokeinterface
     try {
       ((Runnable) null).run();
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -13,6 +36,7 @@ public class NullPointer {
     // invokevirtual
     try {
       ((Object) null).toString();
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -20,6 +44,7 @@ public class NullPointer {
     // arraylength
     try {
       int a = ((byte[]) null).length;
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -27,6 +52,7 @@ public class NullPointer {
     // iaload
     try {
       int a = ((byte[]) null)[42];
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -34,6 +60,7 @@ public class NullPointer {
     // aaload
     try {
       Object a = ((Object[]) null)[42];
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -41,6 +68,7 @@ public class NullPointer {
     // getfield (int)
     try {
       int a = ((NullPointer) null).x;
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -48,6 +76,7 @@ public class NullPointer {
     // getfield (Object)
     try {
       Object a = ((NullPointer) null).y;
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -55,6 +84,7 @@ public class NullPointer {
     // iastore
     try {
       ((byte[]) null)[42] = 42;
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -62,6 +92,7 @@ public class NullPointer {
     // aastore
     try {
       ((Object[]) null)[42] = null;
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -69,6 +100,7 @@ public class NullPointer {
     // putfield (int)
     try {
       ((NullPointer) null).x = 42;
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -76,6 +108,7 @@ public class NullPointer {
     // putfield (Object)
     try {
       ((NullPointer) null).y = null;
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }
@@ -85,6 +118,7 @@ public class NullPointer {
       synchronized ((Object) null) {
         int a = 42;
       }
+      throw new RuntimeException();
     } catch (NullPointerException e) {
       e.printStackTrace();
     }