src/Error/FormattedError.php
public static function toSafeTrace($error)
    {
        $trace = $error->getTrace();

        if (isset($trace[0]['function']) && isset($trace[0]['class']) &&
            // Remove invariant entries as they don't provide much value:
            ($trace[0]['class'] . '::' . $trace[0]['function'] === 'GraphQL\Utils\Utils::invariant')) {
            array_shift($trace);
        } elseif (! isset($trace[0]['file'])) {
            // Remove root call as it's likely error handler trace:
            array_shift($trace);
        }

        return array_map(
            static function ($err) {
                $safeErr = array_intersect_key($err, ['file' => true, 'line' => true]);

                if (isset($err['function'])) {
                    $func    = $err['function'];
                    $args    = ! empty($err['args']) ? array_map([self::class, 'printVar'], $err['args']) : [];
                    $funcStr = $func . '(' . implode(', ', $args) . ')';

                    if (isset($err['class'])) {
                        $safeErr['call'] = $err['class'] . '::' . $funcStr;
                    } else {
                        $safeErr['function'] = $funcStr;
                    }
                }

                return $safeErr;
            },
            $trace
        );
    }
public static function toSafeTrace($error)
    {
        $trace = $error->getTrace();

        if (isset($trace[0]['function']) && isset($trace[0]['class']) &&
            // Remove invariant entries as they don't provide much value:
            ($trace[0]['class'] . '::' . $trace[0]['function'] === 'GraphQL\Utils\Utils::invariant')) {
            array_shift($trace);
        } elseif (! isset($trace[0]['file'])) {
            // Remove root call as it's likely error handler trace:
            array_shift($trace);
        }

        return array_map(
            static function ($err) {
                $safeErr = array_intersect_key($err, ['file' => true, 'line' => true]);

                if (isset($err['function'])) {
                    $func    = $err['function'];
                    $args    = ! empty($err['args']) ? array_map([self::class, 'printVar'], $err['args']) : [];
                    $funcStr = $func . '(' . implode(', ', $args) . ')';

                    if (isset($err['class'])) {
                        $safeErr['call'] = $err['class'] . '::' . $funcStr;
                    } else {
                        $safeErr['function'] = $funcStr;
                    }
                }

                return $safeErr;
            },
            $trace
        );
    }
Returns error trace as serializable array

@param Throwable $error

@return mixed[]

@api