JDK-6954300 : Annotation with generics causes javac to fail when annotation processor present
  • Type: Bug
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 6,6u10
  • Priority: P2
  • Status: Closed
  • Resolution: Duplicate
  • OS: linux,windows
  • CPU: x86
  • Submitted: 2010-05-20
  • Updated: 2012-03-20
  • Resolved: 2011-03-17
Related Reports
Duplicate :  
JDK-6512707 - "incompatible types" after (unrelated) annotation processing
Description
FULL PRODUCT VERSION :
java -version:
java version "1.6.0_20"
Java(TM) SE Runtime Environment (build 1.6.0_20-b02)
Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01, mixed mode)


javac version:
javac 1.6.0_20


ADDITIONAL OS VERSION INFORMATION :
Linux madams-desktop 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:28:05 UTC 2010 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
Note:  This bug is a related to bug #6951911 (http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6951911).  I failed to include another scenario that causes compiler failure.

  Description:  The following annotation definition causes the javac compiler to fail (error below) when an annotation processor is present:

@Target( { ElementType.METHOD, ElementType.CONSTRUCTOR })

@Retention(RetentionPolicy.RUNTIME)

public @interface RequiresMutability {

    boolean value() default true;


    Class<? extends RuntimeException> flings() default RuntimeException.class;

}


This is the annotation processor in use:

public class DummyProcessor extends AbstractProcessor {
    @Override
    public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
        return false;
    }
}


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Included the "Source code for an executable test case" section is a base64 encoded zip file with the reproducible test case.  Two projects each in their own folder:  annproc (compile it first using included compile script), and testcase (see two compile scripts -- the one with an annotation processor on the classpath reproduces the compilation error).

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Successful compilation with or without an annotation processor present.
ACTUAL -
Compiler failure with annotation processor present.  Successful compilation without.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Compiler error:
madams@madams-desktop:~/dev/testcase$ ./compile-with-dummy-processor
[parsing started src/main/java/ann/RequiresMutability.java]
[parsing completed 16ms]
[parsing started src/main/java/ann/ValidatedTime.java]
[parsing completed 0ms]
[search path for source files: ../annproc/target/classes]
[search path for class files: /home/madams/programs/java/jdk1.6.0_20/jre/lib/resources.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/rt.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/sunrsasign.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/jsse.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/jce.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/charsets.jar,/home/madams/programs/java/jdk1.6.0_20/jre/classes,/home/madams/programs/java/jdk1.6.0_20/jre/lib/ext/localedata.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/ext/dnsns.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/ext/sunjce_provider.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/ext/sunpkcs11.jar,../annproc/target/classes]
[loading java/lang/annotation/ElementType.class(java/lang/annotation:ElementType.class)]
[loading java/lang/annotation/Retention.class(java/lang/annotation:Retention.class)]
[loading java/lang/annotation/RetentionPolicy.class(java/lang/annotation:RetentionPolicy.class)]
[loading java/lang/annotation/Target.class(java/lang/annotation:Target.class)]
[loading java/lang/annotation/Annotation.class(java/lang/annotation:Annotation.class)]
[loading java/lang/Object.class(java/lang:Object.class)]
[loading java/lang/Class.class(java/lang:Class.class)]
[loading java/lang/RuntimeException.class(java/lang:RuntimeException.class)]
[loading java/lang/Enum.class(java/lang:Enum.class)]
[loading java/lang/Comparable.class(java/lang:Comparable.class)]
[loading java/io/Serializable.class(java/io:Serializable.class)]
[loading java/lang/String.class(java/lang:String.class)]
Round 1:
	input files: {ann.RequiresMutability, ann.ValidatedTime}
	annotations: [java.lang.annotation.Target, java.lang.annotation.Retention]
	last round: false
Round 2:
	input files: {}
	annotations: []
	last round: true
[search path for source files: ../annproc/target/classes]
[search path for class files: /home/madams/programs/java/jdk1.6.0_20/jre/lib/resources.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/rt.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/sunrsasign.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/jsse.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/jce.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/charsets.jar,/home/madams/programs/java/jdk1.6.0_20/jre/classes,/home/madams/programs/java/jdk1.6.0_20/jre/lib/ext/localedata.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/ext/dnsns.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/ext/sunjce_provider.jar,/home/madams/programs/java/jdk1.6.0_20/jre/lib/ext/sunpkcs11.jar,../annproc/target/classes]
[loading java/lang/annotation/ElementType.class(java/lang/annotation:ElementType.class)]
[loading java/lang/annotation/Retention.class(java/lang/annotation:Retention.class)]
[loading java/lang/annotation/RetentionPolicy.class(java/lang/annotation:RetentionPolicy.class)]
[loading java/lang/annotation/Target.class(java/lang/annotation:Target.class)]
[loading java/lang/annotation/Annotation.class(java/lang/annotation:Annotation.class)]
[loading java/lang/Object.class(java/lang:Object.class)]
[loading java/lang/Class.class(java/lang:Class.class)]
[loading java/lang/RuntimeException.class(java/lang:RuntimeException.class)]
[loading java/lang/Enum.class(java/lang:Enum.class)]
[loading java/lang/Comparable.class(java/lang:Comparable.class)]
[loading java/io/Serializable.class(java/io:Serializable.class)]
[loading java/lang/String.class(java/lang:String.class)]
[loading java/lang/Exception.class(java/lang:Exception.class)]
[loading java/lang/Throwable.class(java/lang:Throwable.class)]
src/main/java/ann/RequiresMutability.java:13: incompatible types
found   : java.lang.Class<java.lang.RuntimeException>
required: java.lang.Class<? extends java.lang.RuntimeException>
    Class<? extends RuntimeException> flings() default RuntimeException.class;
                                                                       ^
src/main/java/ann/ValidatedTime.java:11: incompatible types
found   : ann.ValidatedTime.Precision
required: ann.ValidatedTime.Precision
    Precision precision() default Precision.SECOND;
                                           ^
[checking ann.RequiresMutability]
[loading java/lang/Exception.class(java/lang:Exception.class)]
[loading java/lang/Throwable.class(java/lang:Throwable.class)]
[checking ann.ValidatedTime]
[loading java/lang/CloneNotSupportedException.class(java/lang:CloneNotSupportedException.class)]
[total 397ms]
2 errors


REPRODUCIBILITY :
This bug can be reproduced always.

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UPDATED DESCRIPTION:

Testcase provided by Licensee and uploaded to attachment.
Testcase is Not reproducible using JDK 7 b44 and higher.

See Comments for additional detail that is Licensee specific.
Comments
SUGGESTED FIX See patch for CR 6512707. Testcase provided by Licensee passes on 6u24 + patch.
17-03-2011
EVALUATION This is a dup of 6512707. The relevant fix, to backport to 6, is as follows diff -r e2f8f6daee9d -r 7a595d92e252 src/share/classes/com/sun/tools/javac/tree/TreeScanner.java --- a/src/share/classes/com/sun/tools/javac/tree/TreeScanner.java Fri Dec 19 10:39:02 2008 -0800 +++ b/src/share/classes/com/sun/tools/javac/tree/TreeScanner.java Wed Jan 07 14:48:29 2009 -0800 @@ -86,6 +86,7 @@ scan(tree.typarams); scan(tree.params); scan(tree.thrown); + scan(tree.defaultValue); scan(tree.body); } The OpenJDK changeset in jdk7/jdk7/langtools is 7a595d92e252. changeset: 180:7a595d92e252 parent: 178:e2f8f6daee9d user: jjg date: Wed Jan 07 14:48:29 2009 -0800 summary: 6512707: "incompatible types" after (unrelated) annotation processing
17-03-2011
EVALUATION Suspect a problem cleaning trees between processing rounds -- specifically, the default value for an annotation.
17-03-2011