[COMPRESS-29] Closing an CBZip2OutputStream when no data has been written fails with an java.lang.ArithmeticException: / by zero

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 1.0
• Assignee: Torsten Curdt
• Reporter: Stefan Liebig
• Created: 19/Jun/07 13:02
• Updated: 02/May/23 17:11
• Resolved: 08/Jan/09 11:14

Description

The following test case reproduces the error:

public class CBZip2OutputStreamTest extends TestCase {

/**

• @throws IOException
  */
  public void testEmtpyOutput() throws IOException { CBZip2OutputStream outputStream = new CBZip2OutputStream( new ByteArrayOutputStream() ); outputStream.close(); }

  }

fails with:

java.lang.ArithmeticException: / by zero
at org.apache.tools.bzip2.CBZip2OutputStream.mainSort(CBZip2OutputStream.java:1174)
at org.apache.tools.bzip2.CBZip2OutputStream.doReversibleTransformation(CBZip2OutputStream.java:1386)
at org.apache.tools.bzip2.CBZip2OutputStream.endBlock(CBZip2OutputStream.java:476)
at org.apache.tools.bzip2.CBZip2OutputStream.close(CBZip2OutputStream.java:427)
at CBZip2OutputStreamTest.testEmtpyOutput(CBZip2OutputStreamTest.java:23)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:128)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)