27  * @compile ../common/Foo.java
  28  *          I.java
  29  *          ../common/J.java
  30  *          ../common/C.jasm
  31  *          Task.java
  32  *          ../common/PreemptingClassLoader.java
  33  * @run main/othervm Test
  34  */
  35 
  36 public class Test {
  37 
  38     // Test that LinkageError exceptions are not thrown during itable creation,
  39     // for loader constraint errors, if the target method is an overpass method.
  40     //
  41     // In this test, during itable creation for class C, method "m()LFoo;" for
  42     // C's super interface I has a different class Foo than the selected method's
  43     // type J.  But, the selected method is an overpass method (that throws an
  44     // ICCE). So, no LinkageError exception should be thrown because the loader
  45     // constraint check that would cause the LinkageError should not be done.
  46     public static void main(String... args) throws Exception {
  47         Class<?> c = Foo.class; // forces standard class loader to load Foo
  48         ClassLoader l = new PreemptingClassLoader("Task", "Foo", "C", "I");
  49         Runnable r = (Runnable) l.loadClass("Task").newInstance();
  50         try {
  51             r.run(); // Cause an ICCE because both I and J define m()LFoo;
  52             throw new RuntimeException("Expected ICCE exception not thrown");
  53         } catch (IncompatibleClassChangeError e) {
  54             if (!e.getMessage().contains("Conflicting default methods: I.m J.m")) {
  55                 throw new RuntimeException("Wrong ICCE exception thrown: " + e.getMessage());
  56             }
  57         }
  58     }
  59 }

  27  * @compile ../common/Foo.java
  28  *          I.java
  29  *          ../common/J.java
  30  *          ../common/C.jasm
  31  *          Task.java
  32  *          ../common/PreemptingClassLoader.java
  33  * @run main/othervm Test
  34  */
  35 
  36 public class Test {
  37 
  38     // Test that LinkageError exceptions are not thrown during itable creation,
  39     // for loader constraint errors, if the target method is an overpass method.
  40     //
  41     // In this test, during itable creation for class C, method "m()LFoo;" for
  42     // C's super interface I has a different class Foo than the selected method's
  43     // type J.  But, the selected method is an overpass method (that throws an
  44     // ICCE). So, no LinkageError exception should be thrown because the loader
  45     // constraint check that would cause the LinkageError should not be done.
  46     public static void main(String... args) throws Exception {
  47         Class<?> c = test.Foo.class; // forces standard class loader to load Foo
  48         ClassLoader l = new PreemptingClassLoader("test.Task", "test.Foo", "test.C", "test.I");
  49         Runnable r = (Runnable) l.loadClass("test.Task").newInstance();
  50         try {
  51             r.run(); // Cause an ICCE because both I and J define m()LFoo;
  52             throw new RuntimeException("Expected ICCE exception not thrown");
  53         } catch (IncompatibleClassChangeError e) {
  54             if (!e.getMessage().contains("Conflicting default methods: test/I.m test/J.m")) {
  55                 throw new RuntimeException("Wrong ICCE exception thrown: " + e.getMessage());
  56             }
  57         }
  58     }
  59 }