Fix test failure in SMART mode.

Update test 082-inline-execute to avoid a verifier issue with quickening.

An invoke-virtual is quickened into an invoke-virtual-quick. However it is
made on a "null" instance. During verification, we can't infer the method
being invoked from the vtable index since we have no access to the class. This
leads to fail on a check and abort.

Bug: 11427954
Change-Id: I740d67c72abb617db67a2c35d9be8346358f78ce
diff --git a/test/082-inline-execute/src/Main.java b/test/082-inline-execute/src/Main.java
index f4d2dd1..b881b34 100644
--- a/test/082-inline-execute/src/Main.java
+++ b/test/082-inline-execute/src/Main.java
@@ -37,6 +37,10 @@
     test_String_length();
   }
 
+  private static String nullString() {
+    return null;
+  }
+
   public static void test_String_length() {
     String str0 = "";
     String str1 = "x";
@@ -46,7 +50,7 @@
     Assert.assertEquals(str1.length(), 1);
     Assert.assertEquals(str80.length(), 80);
 
-    String strNull = null;
+    String strNull = nullString();
     try {
       strNull.length();
       Assert.fail();
@@ -61,7 +65,7 @@
     Assert.assertTrue(str0.isEmpty());
     Assert.assertFalse(str1.isEmpty());
 
-    String strNull = null;
+    String strNull = nullString();
     try {
       strNull.isEmpty();
       Assert.fail();
@@ -88,7 +92,7 @@
     } catch (StringIndexOutOfBoundsException expected) {
     }
 
-    String strNull = null;
+    String strNull = nullString();
     try {
       strNull.charAt(0);
       Assert.fail();
@@ -133,7 +137,7 @@
     Assert.assertEquals(str40.indexOf('a',10), 10);
     Assert.assertEquals(str40.indexOf('b',40), -1);
 
-    String strNull = null;
+    String strNull = nullString();
     try {
       strNull.indexOf('a');
       Assert.fail();