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From "Peter Burka (JIRA)" <j...@apache.org>
Subject [jira] [Created] (BCEL-290) Verifier reports 'Constant pool at index 0 is null' for invokedynamic
Date Fri, 09 Jun 2017 17:18:18 GMT
Peter Burka created BCEL-290:
--------------------------------

             Summary: Verifier reports 'Constant pool at index 0 is null' for invokedynamic
                 Key: BCEL-290
                 URL: https://issues.apache.org/jira/browse/BCEL-290
             Project: Commons BCEL
          Issue Type: Bug
    Affects Versions: 6.0
            Reporter: Peter Burka


When the BCEL Verifier encounters an invokedynamic bytecode (such as those generated by javac
for lambdas), it throws a org.apache.bcel.classfile.ClassFormatException in Pass3a reporting
that "Constant pool at index 0 is null."

Test case:
{noformat}
public class Bug3 {
    public Runnable foo() {
	return () -> {};
    }
}
{noformat}

Output:
{noformat}
JustIce by Enver Haase, (C) 2001-2002.
<http://bcel.sourceforge.net>
<http://commons.apache.org/bcel>

Now verifying: Bug3

Pass 1:
VERIFIED_OK
Passed verification.

Pass 2:
VERIFIED_OK
Passed verification.

Pass 3a, method number 0 ['public void <init>()']:
VERIFIED_OK
Passed verification.

Pass 3b, method number 0 ['public void <init>()']:
VERIFIED_OK
Passed verification.

Exception in thread "main" org.apache.bcel.classfile.ClassFormatException: Constant pool at
index 0 is null.
	at org.apache.bcel.classfile.ConstantPool.getConstant(ConstantPool.java:258)
	at org.apache.bcel.classfile.ConstantPool.getConstantString(ConstantPool.java:293)
	at org.apache.bcel.generic.FieldOrMethod.getReferenceType(FieldOrMethod.java:116)
	at org.apache.bcel.generic.FieldOrMethod.getLoadClassType(FieldOrMethod.java:133)
	at org.apache.bcel.verifier.statics.Pass3aVerifier$InstOperandConstraintVisitor.visitLoadClass(Pass3aVerifier.java:521)
	at org.apache.bcel.generic.INVOKEDYNAMIC.accept(INVOKEDYNAMIC.java:114)
	at org.apache.bcel.generic.InstructionHandle.accept(InstructionHandle.java:302)
	at org.apache.bcel.verifier.statics.Pass3aVerifier.pass3StaticInstructionOperandsChecks(Pass3aVerifier.java:443)
	at org.apache.bcel.verifier.statics.Pass3aVerifier.do_verify(Pass3aVerifier.java:208)
	at org.apache.bcel.verifier.PassVerifier.verify(PassVerifier.java:71)
	at org.apache.bcel.verifier.Verifier.doPass3a(Verifier.java:89)
	at org.apache.bcel.verifier.Verifier.main(Verifier.java:216)
{noformat}



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