phacility/phabricator · error · ConduitException

ERR-NO-PASTE

ERR-NO-PASTE

Error message

Paste may not be empty.

What it means

Conduit error ERR-NO-PASTE, the only error type paste.create defines, returned when the 'content' parameter is null or an empty string (checked with strlen, so '0' is accepted). A paste must contain at least one byte of body text; the check happens before any transaction or policy logic runs.

Source

Thrown at src/applications/paste/conduit/PasteCreateConduitAPIMethod.php:47

  }

  protected function defineReturnType() {
    return 'nonempty dict';
  }

  protected function defineErrorTypes() {
    return array(
      'ERR-NO-PASTE' => pht('Paste may not be empty.'),
    );
  }

  protected function execute(ConduitAPIRequest $request) {
    $content  = $request->getValue('content');
    $title    = $request->getValue('title');
    $language = $request->getValue('language');

    if ($content === null || !strlen($content)) {
      throw new ConduitException('ERR-NO-PASTE');
    }

    $title = nonempty($title, pht('Masterwork From Distant Lands'));
    $language = nonempty($language, '');

    $viewer = $request->getUser();

    $paste = PhabricatorPaste::initializeNewPaste($viewer);

    $xactions = array();

    $xactions[] = id(new PhabricatorPasteTransaction())
      ->setTransactionType(PhabricatorPasteContentTransaction::TRANSACTIONTYPE)
      ->setNewValue($content);

    $xactions[] = id(new PhabricatorPasteTransaction())
      ->setTransactionType(PhabricatorPasteTitleTransaction::TRANSACTIONTYPE)
      ->setNewValue($title);

View on GitHub (pinned to 5720a38cfe)

Solutions

1. Verify content is a non-empty string before calling paste.create.
2. If empty output is legitimate, skip the call or substitute a placeholder body such as '(empty output)'.
3. Fix the upstream source: check the file read or command execution that produced the content variable.

Example fix

// before
$result = $conduit->callMethod(
  'paste.create',
  array(
    'content' => $content, // $content is null
  ));

// after
if ($content === null || !strlen($content)) {
  throw new Exception('Refusing to create an empty paste.');
}
$result = $conduit->callMethod(
  'paste.create',
  array(
    'content' => $content,
  ));

if (!is_string($content) || !strlen($content)) {
  throw new Exception('Refusing to create an empty paste.');
}
$result = $conduit->callMethod(
  'paste.create',
  array(
    'content' => $content,
  ));

function is_nonempty_paste_content($content) {
  return is_string($content) && strlen($content) > 0;
}

try {
  $result = $conduit->callMethod('paste.create', $params);
} catch (ConduitException $ex) {
  if ($ex->getCode() === 'ERR-NO-PASTE') {
    // fix the upstream content source and retry with non-empty body
  }
}

When it happens

Trigger: Calling the conduit method paste.create with content omitted, set to '', or carried by a variable that evaluated to null (failed file read, wrong array key, upstream command that produced no output).

Common situations: CLI/arcanist snippets piping command output that happens to be empty; reading a missing file into $content; JSON payload typos like 'contents' or 'text' that leave content unset; CI jobs that paste logs which are occasionally empty.

Related errors

• Service "%s" is unrecognized, restricted, or you do not have
• Service type "%s" is unrecognized. Valid types are: %s.
• Transaction value when deleting Almanac properties must be a
• When deleting Almanac properties, each property name must be
• Transaction value when setting Almanac properties must be a

AI-assisted analysis of phacility/phabricator@5720a38cfe (2026-08-21). Data as JSON: /api/errors/ebdd9577a1a2e472. Report an issue: GitHub.