Program: 91331
Project: 91331
Buggy source:
/** 
 * Executes the   {@code commit} command with all the options and parameterscollected by the setter methods of this class. Each instance of this class should only be used for one invocation of the command (means: one call to  {@link #call()})
 * @return a {@link RevCommit} object representing the successful commit.
 * @throws NoHeadException when called on a git repo without a HEAD reference
 * @throws NoMessageException when called without specifying a commit message
 * @throws UnmergedPathException when the current index contained unmerged pathes (conflicts)
 * @throws WrongRepositoryStateException when repository is not in the right state for committing
 * @throws JGitInternalException a low-level exception of JGit has occurred. The original exception can be retrieved by calling {@link Exception#getCause()}. Expect only  {@code IOException's} to be wrapped. Subclasses of{@link IOException} (e.g. {@link UnmergedPathException}) are typically not wrapped here but thrown as original exception
 */
public RevCommit call() throws NoHeadException, NoMessageException, UnmergedPathException, ConcurrentRefUpdateException, JGitInternalException, WrongRepositoryStateException {
  checkCallable();
  RepositoryState state=repo.getRepositoryState();
  if (!state.canCommit())   throw new WrongRepositoryStateException(MessageFormat.format(JGitText.get().cannotCommitOnARepoWithState,state.name()));
  processOptions(state);
  try {
    if (all && !repo.isBare() && repo.getWorkTree() != null) {
      Git git=new Git(repo);
      try {
        git.add().addFilepattern("String_Node_Str").setUpdate(true).call();
      }
 catch (      NoFilepatternException e) {
        throw new JGitInternalException(e.getMessage(),e);
      }
    }
    Ref head=repo.getRef(Constants.HEAD);
    if (head == null)     throw new NoHeadException(JGitText.get().commitOnRepoWithoutHEADCurrentlyNotSupported);
    ObjectId headId=repo.resolve(Constants.HEAD + "String_Node_Str");
    if (headId != null)     parents.add(0,headId);
    DirCache index=repo.lockDirCache();
    try {
      ObjectInserter odi=repo.newObjectInserter();
      try {
        ObjectId indexTreeId=index.writeTree(odi);
        CommitBuilder commit=new CommitBuilder();
        commit.setCommitter(committer);
        commit.setAuthor(author);
        commit.setMessage(message);
        commit.setParentIds(parents);
        commit.setTreeId(indexTreeId);
        ObjectId commitId=odi.insert(commit);
        odi.flush();
        RevWalk revWalk=new RevWalk(repo);
        try {
          RevCommit revCommit=revWalk.parseCommit(commitId);
          RefUpdate ru=repo.updateRef(Constants.HEAD);
          ru.setNewObjectId(commitId);
          ru.setRefLogMessage("String_Node_Str" + revCommit.getShortMessage(),false);
          ru.setExpectedOldObjectId(headId);
          Result rc=ru.update();
switch (rc) {
case NEW:
case FAST_FORWARD:
{
              setCallable(false);
              if (state == RepositoryState.MERGING_RESOLVED) {
                repo.writeMergeCommitMsg(null);
                repo.writeMergeHeads(null);
              }
              return revCommit;
            }
case REJECTED:
case LOCK_FAILURE:
          throw new ConcurrentRefUpdateException(JGitText.get().couldNotLockHEAD,ru.getRef(),rc);
default :
        throw new JGitInternalException(MessageFormat.format(JGitText.get().updatingRefFailed,Constants.HEAD,commitId.toString(),rc));
    }
  }
  finally {
    revWalk.release();
  }
}
  finally {
  odi.release();
}
}
  finally {
index.unlock();
}
}
 catch (UnmergedPathException e) {
throw e;
}
catch (IOException e) {
throw new JGitInternalException(JGitText.get().exceptionCaughtDuringExecutionOfCommitCommand,e);
}
}

Fixed version (ground truth):
/** 
 * Executes the   {@code commit} command with all the options and parameterscollected by the setter methods of this class. Each instance of this class should only be used for one invocation of the command (means: one call to  {@link #call()})
 * @return a {@link RevCommit} object representing the successful commit.
 * @throws NoHeadException when called on a git repo without a HEAD reference
 * @throws NoMessageException when called without specifying a commit message
 * @throws UnmergedPathException when the current index contained unmerged paths (conflicts)
 * @throws WrongRepositoryStateException when repository is not in the right state for committing
 * @throws JGitInternalException a low-level exception of JGit has occurred. The original exception can be retrieved by calling {@link Exception#getCause()}. Expect only  {@code IOException's} to be wrapped. Subclasses of{@link IOException} (e.g. {@link UnmergedPathException}) are typically not wrapped here but thrown as original exception
 */
public RevCommit call() throws NoHeadException, NoMessageException, UnmergedPathException, ConcurrentRefUpdateException, JGitInternalException, WrongRepositoryStateException {
  checkCallable();
  RepositoryState state=repo.getRepositoryState();
  if (!state.canCommit())   throw new WrongRepositoryStateException(MessageFormat.format(JGitText.get().cannotCommitOnARepoWithState,state.name()));
  processOptions(state);
  try {
    if (all && !repo.isBare() && repo.getWorkTree() != null) {
      Git git=new Git(repo);
      try {
        git.add().addFilepattern("String_Node_Str").setUpdate(true).call();
      }
 catch (      NoFilepatternException e) {
        throw new JGitInternalException(e.getMessage(),e);
      }
    }
    Ref head=repo.getRef(Constants.HEAD);
    if (head == null)     throw new NoHeadException(JGitText.get().commitOnRepoWithoutHEADCurrentlyNotSupported);
    ObjectId headId=repo.resolve(Constants.HEAD + "String_Node_Str");
    if (headId != null)     parents.add(0,headId);
    DirCache index=repo.lockDirCache();
    try {
      ObjectInserter odi=repo.newObjectInserter();
      try {
        ObjectId indexTreeId=index.writeTree(odi);
        CommitBuilder commit=new CommitBuilder();
        commit.setCommitter(committer);
        commit.setAuthor(author);
        commit.setMessage(message);
        commit.setParentIds(parents);
        commit.setTreeId(indexTreeId);
        ObjectId commitId=odi.insert(commit);
        odi.flush();
        RevWalk revWalk=new RevWalk(repo);
        try {
          RevCommit revCommit=revWalk.parseCommit(commitId);
          RefUpdate ru=repo.updateRef(Constants.HEAD);
          ru.setNewObjectId(commitId);
          ru.setRefLogMessage("String_Node_Str" + revCommit.getShortMessage(),false);
          ru.setExpectedOldObjectId(headId);
          Result rc=ru.update();
switch (rc) {
case NEW:
case FAST_FORWARD:
{
              setCallable(false);
              if (state == RepositoryState.MERGING_RESOLVED) {
                repo.writeMergeCommitMsg(null);
                repo.writeMergeHeads(null);
              }
              return revCommit;
            }
case REJECTED:
case LOCK_FAILURE:
          throw new ConcurrentRefUpdateException(JGitText.get().couldNotLockHEAD,ru.getRef(),rc);
default :
        throw new JGitInternalException(MessageFormat.format(JGitText.get().updatingRefFailed,Constants.HEAD,commitId.toString(),rc));
    }
  }
  finally {
    revWalk.release();
  }
}
  finally {
  odi.release();
}
}
  finally {
index.unlock();
}
}
 catch (UnmergedPathException e) {
throw e;
}
catch (IOException e) {
throw new JGitInternalException(JGitText.get().exceptionCaughtDuringExecutionOfCommitCommand,e);
}
}