Add classname to "Required class information is missing" error

[Vladimir Sitnikov]

See https://github.com/wildfly/jandex/blob/7f2c075ba9246e4b6cc8fe7f3e3678dc2b64891c/src/main/java/org/jboss/jandex/Indexer.java#L926

The error message is hard to understand, and the root cause is not clear.

What do you think if the error includes the class name or something else for making the exception actionable?

The current exception:

Caused by: java.lang.IllegalStateException: Required class information is missing
         at org.jboss.jandex.Indexer.rebuildNestedType(Indexer.java:926)
         at org.jboss.jandex.Indexer.resolveTypePath(Indexer.java:786)
         at org.jboss.jandex.Indexer.resolveTypeAnnotation(Indexer.java:705)
         at org.jboss.jandex.Indexer.resolveTypeAnnotations(Indexer.java:613)
         at org.jboss.jandex.Indexer.index(Indexer.java:1602)
         at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.toClassDescriptor(ClassFileArchiveEntryHandler.java:64)
         at org.hibernate.boot.archive.scan.spi.ClassFileArchiveEntryHandler.handleEntry(ClassFileArchiveEntryHandler.java:52)

Context: https://www.postgresql.org/message-id/AM0PR04MB652919E6F344C84DC3073D0D96140%40AM0PR04MB6529.eurprd04.prod.outlook.com

[Vladimir Sitnikov]

Another exception:

            Caused by: java.lang.IllegalStateException: Class extends type annotation appeared on a non class target
                at org.jboss.jandex.Indexer.processTypeAnnotation(Indexer.java:538)
                at org.jboss.jandex.Indexer.processTypeAnnotations(Indexer.java:515)
                at org.jboss.jandex.Indexer.processAttributes(Indexer.java:355)
                at org.jboss.jandex.Indexer.processMethodInfo(Indexer.java:306)
                at org.jboss.jandex.Indexer.index(Indexer.java:1602)

[Jason T. Greene]

thanks for the report

[Vladimir Sitnikov]

Reproducer:

    public static class IteratorSupplier implements Supplier<Consumer<@Nullable Object[]>> {
        @Override
        public Consumer<@Nullable Object[]> get() {
            return new Consumer<@Nullable Object[]>() {
                @Override
                public void accept(@Nullable Object[] objects) {
                }
            };
        }
    }

Then parse IteratorSupplier$1.class (==class file for the anonymous new Consumer)

Signature as compiled with javac 1.8u222:

Signature: #28                          // Ljava/lang/Object;Ljava/util/function/Consumer<[Ljava/lang/Object;>;
SourceFile: "BridgeMethodTest.java"
RuntimeVisibleTypeAnnotations:
  0: #25(): CLASS_EXTENDS, type_index=0, location=[INNER_TYPE, TYPE_ARGUMENT(0), ARRAY]
    org.checkerframework.checker.nullness.qual.Nullable

[Vladimir Sitnikov]

This might be relevant: https://bugs.openjdk.java.net/browse/JDK-8198945, so it might be yet another javac issue :-/