Program: 91332
Project: 91332
Buggy source:
/** 
 * Executes the   {@code Merge} command with all the options and parameterscollected by the setter methods (e.g.  {@link #include(Ref)}) of this class. Each instance of this class should only be used for one invocation of the command. Don't call this method twice on an instance.
 * @return the result of the merge
 */
public MergeResult call() throws NoHeadException, ConcurrentRefUpdateException, CheckoutConflictException, InvalidMergeHeadsException, WrongRepositoryStateException, NoMessageException {
  checkCallable();
  if (commits.size() != 1)   throw new InvalidMergeHeadsException(commits.isEmpty() ? JGitText.get().noMergeHeadSpecified : MessageFormat.format(JGitText.get().mergeStrategyDoesNotSupportHeads,mergeStrategy.getName(),Integer.valueOf(commits.size())));
  RevWalk revWalk=null;
  try {
    Ref head=repo.getRef(Constants.HEAD);
    if (head == null)     throw new NoHeadException(JGitText.get().commitOnRepoWithoutHEADCurrentlyNotSupported);
    StringBuilder refLogMessage=new StringBuilder("String_Node_Str");
    revWalk=new RevWalk(repo);
    RevCommit headCommit=revWalk.lookupCommit(head.getObjectId());
    Ref ref=commits.get(0);
    refLogMessage.append(ref.getName());
    ObjectId objectId=ref.getPeeledObjectId();
    if (objectId == null)     objectId=ref.getObjectId();
    RevCommit srcCommit=revWalk.lookupCommit(objectId);
    if (revWalk.isMergedInto(srcCommit,headCommit)) {
      setCallable(false);
      return new MergeResult(headCommit,srcCommit,new ObjectId[]{headCommit,srcCommit},MergeStatus.ALREADY_UP_TO_DATE,mergeStrategy,null,null);
    }
 else     if (revWalk.isMergedInto(headCommit,srcCommit)) {
      refLogMessage.append("String_Node_Str" + MergeStatus.FAST_FORWARD);
      DirCacheCheckout dco=new DirCacheCheckout(repo,headCommit.getTree(),repo.lockDirCache(),srcCommit.getTree());
      dco.setFailOnConflict(true);
      dco.checkout();
      updateHead(refLogMessage,srcCommit,head.getObjectId());
      setCallable(false);
      return new MergeResult(srcCommit,srcCommit,new ObjectId[]{headCommit,srcCommit},MergeStatus.FAST_FORWARD,mergeStrategy,null,null);
    }
 else {
      repo.writeMergeCommitMsg(new MergeMessageFormatter().format(commits,head));
      repo.writeMergeHeads(Arrays.asList(ref.getObjectId()));
      ThreeWayMerger merger=(ThreeWayMerger)mergeStrategy.newMerger(repo);
      boolean noProblems;
      Map<String,org.eclipse.jgit.merge.MergeResult<?>> lowLevelResults=null;
      Map<String,MergeFailureReason> failingPaths=null;
      if (merger instanceof ResolveMerger) {
        ResolveMerger resolveMerger=(ResolveMerger)merger;
        resolveMerger.setCommitNames(new String[]{"String_Node_Str","String_Node_Str",ref.getName()});
        resolveMerger.setWorkingTreeIterator(new FileTreeIterator(repo));
        noProblems=merger.merge(headCommit,srcCommit);
        lowLevelResults=resolveMerger.getMergeResults();
        failingPaths=resolveMerger.getFailingPathes();
      }
 else       noProblems=merger.merge(headCommit,srcCommit);
      if (noProblems) {
        DirCacheCheckout dco=new DirCacheCheckout(repo,headCommit.getTree(),repo.lockDirCache(),merger.getResultTreeId());
        dco.setFailOnConflict(true);
        dco.checkout();
        RevCommit newHead=new Git(getRepository()).commit().call();
        return new MergeResult(newHead.getId(),null,new ObjectId[]{headCommit.getId(),srcCommit.getId()},MergeStatus.MERGED,mergeStrategy,null,null);
      }
 else {
        if (failingPaths != null) {
          repo.writeMergeCommitMsg(null);
          repo.writeMergeHeads(null);
          return new MergeResult(null,merger.getBaseCommit(0,1),new ObjectId[]{headCommit.getId(),srcCommit.getId()},MergeStatus.FAILED,mergeStrategy,lowLevelResults,null);
        }
 else         return new MergeResult(null,merger.getBaseCommit(0,1),new ObjectId[]{headCommit.getId(),srcCommit.getId()},MergeStatus.CONFLICTING,mergeStrategy,lowLevelResults,null);
      }
    }
  }
 catch (  IOException e) {
    throw new JGitInternalException(MessageFormat.format(JGitText.get().exceptionCaughtDuringExecutionOfMergeCommand,e),e);
  }
 finally {
    if (revWalk != null)     revWalk.release();
  }
}

Fixed version (ground truth):
/** 
 * Executes the   {@code Merge} command with all the options and parameterscollected by the setter methods (e.g.  {@link #include(Ref)}) of this class. Each instance of this class should only be used for one invocation of the command. Don't call this method twice on an instance.
 * @return the result of the merge
 */
public MergeResult call() throws NoHeadException, ConcurrentRefUpdateException, CheckoutConflictException, InvalidMergeHeadsException, WrongRepositoryStateException, NoMessageException {
  checkCallable();
  if (commits.size() != 1)   throw new InvalidMergeHeadsException(commits.isEmpty() ? JGitText.get().noMergeHeadSpecified : MessageFormat.format(JGitText.get().mergeStrategyDoesNotSupportHeads,mergeStrategy.getName(),Integer.valueOf(commits.size())));
  RevWalk revWalk=null;
  try {
    Ref head=repo.getRef(Constants.HEAD);
    if (head == null)     throw new NoHeadException(JGitText.get().commitOnRepoWithoutHEADCurrentlyNotSupported);
    StringBuilder refLogMessage=new StringBuilder("String_Node_Str");
    revWalk=new RevWalk(repo);
    RevCommit headCommit=revWalk.lookupCommit(head.getObjectId());
    Ref ref=commits.get(0);
    refLogMessage.append(ref.getName());
    ObjectId objectId=ref.getPeeledObjectId();
    if (objectId == null)     objectId=ref.getObjectId();
    RevCommit srcCommit=revWalk.lookupCommit(objectId);
    if (revWalk.isMergedInto(srcCommit,headCommit)) {
      setCallable(false);
      return new MergeResult(headCommit,srcCommit,new ObjectId[]{headCommit,srcCommit},MergeStatus.ALREADY_UP_TO_DATE,mergeStrategy,null,null);
    }
 else     if (revWalk.isMergedInto(headCommit,srcCommit)) {
      refLogMessage.append("String_Node_Str" + MergeStatus.FAST_FORWARD);
      DirCacheCheckout dco=new DirCacheCheckout(repo,headCommit.getTree(),repo.lockDirCache(),srcCommit.getTree());
      dco.setFailOnConflict(true);
      dco.checkout();
      updateHead(refLogMessage,srcCommit,head.getObjectId());
      setCallable(false);
      return new MergeResult(srcCommit,srcCommit,new ObjectId[]{headCommit,srcCommit},MergeStatus.FAST_FORWARD,mergeStrategy,null,null);
    }
 else {
      repo.writeMergeCommitMsg(new MergeMessageFormatter().format(commits,head));
      repo.writeMergeHeads(Arrays.asList(ref.getObjectId()));
      ThreeWayMerger merger=(ThreeWayMerger)mergeStrategy.newMerger(repo);
      boolean noProblems;
      Map<String,org.eclipse.jgit.merge.MergeResult<?>> lowLevelResults=null;
      Map<String,MergeFailureReason> failingPaths=null;
      if (merger instanceof ResolveMerger) {
        ResolveMerger resolveMerger=(ResolveMerger)merger;
        resolveMerger.setCommitNames(new String[]{"String_Node_Str","String_Node_Str",ref.getName()});
        resolveMerger.setWorkingTreeIterator(new FileTreeIterator(repo));
        noProblems=merger.merge(headCommit,srcCommit);
        lowLevelResults=resolveMerger.getMergeResults();
        failingPaths=resolveMerger.getFailingPaths();
      }
 else       noProblems=merger.merge(headCommit,srcCommit);
      if (noProblems) {
        DirCacheCheckout dco=new DirCacheCheckout(repo,headCommit.getTree(),repo.lockDirCache(),merger.getResultTreeId());
        dco.setFailOnConflict(true);
        dco.checkout();
        RevCommit newHead=new Git(getRepository()).commit().call();
        return new MergeResult(newHead.getId(),null,new ObjectId[]{headCommit.getId(),srcCommit.getId()},MergeStatus.MERGED,mergeStrategy,null,null);
      }
 else {
        if (failingPaths != null) {
          repo.writeMergeCommitMsg(null);
          repo.writeMergeHeads(null);
          return new MergeResult(null,merger.getBaseCommit(0,1),new ObjectId[]{headCommit.getId(),srcCommit.getId()},MergeStatus.FAILED,mergeStrategy,lowLevelResults,null);
        }
 else         return new MergeResult(null,merger.getBaseCommit(0,1),new ObjectId[]{headCommit.getId(),srcCommit.getId()},MergeStatus.CONFLICTING,mergeStrategy,lowLevelResults,null);
      }
    }
  }
 catch (  IOException e) {
    throw new JGitInternalException(MessageFormat.format(JGitText.get().exceptionCaughtDuringExecutionOfMergeCommand,e),e);
  }
 finally {
    if (revWalk != null)     revWalk.release();
  }
}