Program: 8278
Project: 8278
Buggy source:
@NonNull @Override public OperationResult execute(RevokeKeyringParcel revokeKeyringParcel,CryptoInputParcel cryptoInputParcel){
  cryptoInputParcel.mCachePassphrase=false;
  long masterKeyId=revokeKeyringParcel.mMasterKeyId;
  OperationResult.OperationLog log=new OperationResult.OperationLog();
  log.add(OperationResult.LogType.MSG_REVOKE,0,KeyFormattingUtils.beautifyKeyId(masterKeyId));
  try {
    Uri secretUri=KeychainContract.KeyRings.buildUnifiedKeyRingUri(masterKeyId);
    CachedPublicKeyRing keyRing=mProviderHelper.getCachedPublicKeyRing(secretUri);
switch (keyRing.getSecretKeyType(masterKeyId)) {
case GNU_DUMMY:
      log.add(OperationResult.LogType.MSG_EK_ERROR_DUMMY,1);
    return new RevokeResult(RevokeResult.RESULT_ERROR,log,masterKeyId);
}
SaveKeyringParcel saveKeyringParcel=new SaveKeyringParcel(masterKeyId,keyRing.getFingerprint());
saveKeyringParcel.setUpdateOptions(revokeKeyringParcel.mUpload,true,revokeKeyringParcel.mKeyserver);
saveKeyringParcel.mRevokeSubKeys.add(masterKeyId);
InputPendingResult revokeAndUploadResult=new EditKeyOperation(mContext,mProviderHelper,mProgressable,mCancelled).execute(saveKeyringParcel,cryptoInputParcel);
if (revokeAndUploadResult.isPending()) {
  return revokeAndUploadResult;
}
log.add(revokeAndUploadResult,1);
if (revokeAndUploadResult.success()) {
  log.add(OperationResult.LogType.MSG_REVOKE_OK,1);
  return new RevokeResult(RevokeResult.RESULT_OK,log,masterKeyId);
}
 else {
  log.add(OperationResult.LogType.MSG_REVOKE_KEY_FAIL,1);
  return new RevokeResult(RevokeResult.RESULT_ERROR,log,masterKeyId);
}
}
 catch (PgpKeyNotFoundException|ProviderHelper.NotFoundException e) {
Log.e(Constants.TAG,"String_Node_Str",e);
log.add(OperationResult.LogType.MSG_REVOKE_KEY_FAIL,1);
return new RevokeResult(RevokeResult.RESULT_ERROR,log,masterKeyId);
}
}

Fixed version (ground truth):
@NonNull @Override public OperationResult execute(RevokeKeyringParcel revokeKeyringParcel,CryptoInputParcel cryptoInputParcel){
  cryptoInputParcel.mCachePassphrase=false;
  long masterKeyId=revokeKeyringParcel.mMasterKeyId;
  OperationResult.OperationLog log=new OperationResult.OperationLog();
  log.add(OperationResult.LogType.MSG_REVOKE,0,KeyFormattingUtils.beautifyKeyId(masterKeyId));
  try {
    Uri secretUri=KeychainContract.KeyRings.buildUnifiedKeyRingUri(masterKeyId);
    CachedPublicKeyRing keyRing=mProviderHelper.getCachedPublicKeyRing(secretUri);
switch (keyRing.getSecretKeyType(masterKeyId)) {
case GNU_DUMMY:
      log.add(OperationResult.LogType.MSG_EK_ERROR_DUMMY,1);
    return new RevokeResult(RevokeResult.RESULT_ERROR,log,masterKeyId);
}
SaveKeyringParcel saveKeyringParcel=new SaveKeyringParcel(masterKeyId,keyRing.getFingerprint());
saveKeyringParcel.setUpdateOptions(revokeKeyringParcel.mUpload,true,revokeKeyringParcel.mKeyserver);
saveKeyringParcel.mRevokeSubKeys.add(masterKeyId);
InputPendingResult revokeAndUploadResult=new EditKeyOperation(mContext,mProviderHelper,mProgressable,mCancelled).execute(saveKeyringParcel,cryptoInputParcel);
if (revokeAndUploadResult.isPending()) {
  return revokeAndUploadResult;
}
log.add(revokeAndUploadResult,1);
if (revokeAndUploadResult.success()) {
  log.add(OperationResult.LogType.MSG_REVOKE_OK,1);
  return new RevokeResult(RevokeResult.RESULT_OK,log,masterKeyId);
}
 else {
  log.add(OperationResult.LogType.MSG_REVOKE_ERROR_KEY_FAIL,1);
  return new RevokeResult(RevokeResult.RESULT_ERROR,log,masterKeyId);
}
}
 catch (PgpKeyNotFoundException|ProviderHelper.NotFoundException e) {
Log.e(Constants.TAG,"String_Node_Str",e);
log.add(OperationResult.LogType.MSG_REVOKE_ERROR_KEY_FAIL,1);
return new RevokeResult(RevokeResult.RESULT_ERROR,log,masterKeyId);
}
}