Cannot pop operand off an empty stack
-------------------------------------
Key: SANDBOX-319
URL: https://issues.apache.org/jira/browse/SANDBOX-319
Project: Commons Sandbox
Issue Type: Bug
Components: Javaflow
Environment: Java 6
javaflow svn revision 892381
(http://svn.apache.org/repos/asf/commons/sandbox/javaflow/trunk)
Debian (mix of testing and unstable)
Reporter: Joshua Ball
Steps to reproduce:
Create the file Example.java:
--------------
import java.util.concurrent.*;
public class Example {
private Executor executor = Executors.newFixedThreadPool(8);
private ScheduledThreadPoolExecutor stpe = new
ScheduledThreadPoolExecutor(1);
public ScheduledFuture<?> schedule(final Runnable command, long delay,
TimeUnit unit) {
return stpe.schedule(new Runnable() {
public void run() {
executor.execute(command);
}
}, delay, unit);
}
}
--------------
and the file Rewriter.java:
---------------
import org.apache.commons.javaflow.utils.RewritingUtils;
import org.apache.commons.javaflow.bytecode.transformation.ResourceTransformer;
import
org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer;
import java.io.File;
public class Rewriter {
public static void main(String[] args) throws Exception {
ResourceTransformer transformer = new AsmClassTransformer();
RewritingUtils.rewriteClassFile(new File("Example.class"), transformer,
new File("ExampleRewritten.class"));
}
}
----------------
Compile:
javac -cp $JAVAFLOW *.java
Run:
java -cp $JAVAFLOW Rewriter
It produces the following error:
org.objectweb.asm.tree.analysis.AnalyzerException: Error at instruction 6:
Method owner: expected LExample$1;, but found
Ljava/util/concurrent/ScheduledThreadPoolExecutor;
at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
at
org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer$2.analyze(ContinuationMethodAnalyzer.java:124)
at
org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:135)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at
org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
at
org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
at
org.apache.commons.javaflow.utils.RewritingUtils.rewriteClassFile(RewritingUtils.java:60)
at Rewriter.main(Rewriter.java:10)
Caused by: org.objectweb.asm.tree.analysis.AnalyzerException: Method owner:
expected LExample$1;, but found
Ljava/util/concurrent/ScheduledThreadPoolExecutor;
at org.objectweb.asm.tree.analysis.BasicVerifier.naryOperation(Unknown
Source)
at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
at
org.apache.commons.javaflow.bytecode.transformation.asm.MonitoringFrame.execute(MonitoringFrame.java:70)
... 9 more
org.objectweb.asm.tree.analysis.AnalyzerException: Error at instruction 9:
Cannot pop operand off an empty stack.
at org.objectweb.asm.tree.analysis.Analyzer.analyze(Unknown Source)
at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown Source)
at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown Source)
at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
at
org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at
org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
at
org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
at
org.apache.commons.javaflow.utils.RewritingUtils.rewriteClassFile(RewritingUtils.java:60)
at Rewriter.main(Rewriter.java:10)
Caused by: java.lang.IndexOutOfBoundsException: Cannot pop operand off an empty
stack.
at org.objectweb.asm.tree.analysis.Frame.pop(Unknown Source)
at org.objectweb.asm.tree.analysis.Frame.execute(Unknown Source)
... 11 more
Exception in thread "main" java.lang.RuntimeException: Error at instruction 9:
Cannot pop operand off an empty stack.
schedule(Ljava/lang/Runnable;JLjava/util/concurrent/TimeUnit;)Ljava/util/concurrent/ScheduledFuture;
00000 R R J . R : : L0
00001 R R J . R : : LINENUMBER 7 L0
00002 R R J . R : : ALOAD 0
00003 R R J . R : R : GETFIELD Example.stpe :
Ljava/util/concurrent/ScheduledThreadPoolExecutor;
00004 R R J . R : R : ALOAD 0
00005 R R J . R : R R : ALOAD 1
00006 R R J . R : R R R : INVOKESPECIAL Example$1.<init>
(LExample;Ljava/lang/Runnable;)V
00007 R R J . R : : NEW Example$1
00008 R R J . R : R : DUP
00009 R R J . R : R R : DUP2_X2
00010 ? : POP2
00011 ? : LLOAD 2
00012 ? : ALOAD 4
00013 ? : L1
00014 ? : INVOKEVIRTUAL
java/util/concurrent/ScheduledThreadPoolExecutor.schedule
(Ljava/lang/Runnable;JLjava/util/concurrent/TimeUnit;)Ljava/util/concurrent/ScheduledFuture;
00015 ? : ARETURN
at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown Source)
at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown Source)
at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
at
org.apache.commons.javaflow.bytecode.transformation.asm.ContinuationMethodAnalyzer.visitEnd(ContinuationMethodAnalyzer.java:141)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at org.objectweb.asm.ClassReader.accept(Unknown Source)
at
org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:53)
at
org.apache.commons.javaflow.bytecode.transformation.asm.AsmClassTransformer.transform(AsmClassTransformer.java:40)
at
org.apache.commons.javaflow.utils.RewritingUtils.rewriteClassFile(RewritingUtils.java:60)
at Rewriter.main(Rewriter.java:10)
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