Registrando o package Filp/Whoops no Laravel

Handler.php

<?php

namespace App\Exceptions;

use Exception;
use Illuminate\Auth\AuthenticationException;
use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;

class Handler extends ExceptionHandler
{
    /**
     * A list of the exception types that should not be reported.
     *
     * @var array
     */
    protected $dontReport = [
        \Illuminate\Auth\AuthenticationException::class,
        \Illuminate\Auth\Access\AuthorizationException::class,
        \Symfony\Component\HttpKernel\Exception\HttpException::class,
        \Illuminate\Database\Eloquent\ModelNotFoundException::class,
        \Illuminate\Session\TokenMismatchException::class,
        \Illuminate\Validation\ValidationException::class,
    ];

    /**
     * Report or log an exception.
     *
     * This is a great spot to send exceptions to Sentry, Bugsnag, etc.
     *
     * @param  \Exception  $exception
     * @return void
     */
    public function report(Exception $exception)
    {
        parent::report($exception);
    }

    /**
     * Render an exception into an HTTP response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Exception  $exception
     * @return \Illuminate\Http\Response
     */
    public function render($request, Exception $exception)
    {
         if (config('app.debug') && config('app.env') == 'local') {
            return $this->renderExceptionWithWhoops($request, $exception);
        }

        return parent::render($request, $exception);
    }

    /**
     * Convert an authentication exception into an unauthenticated response.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Illuminate\Auth\AuthenticationException  $exception
     * @return \Illuminate\Http\Response
     */
    protected function unauthenticated($request, AuthenticationException $exception)
    {
        if ($request->expectsJson()) {
            return response()->json(['error' => 'Unauthenticated.'], 401);
        }

        return redirect()->guest('login');
    }


    /**
     * Render an exception using Whoops.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Exception $e
     * @return \Illuminate\Http\Response
     */
    protected function renderExceptionWithWhoops($request, Exception $e)
    {
        $whoops = new \Whoops\Run;

        if ($request->ajax()) {
            $whoops->pushHandler(new \Whoops\Handler\JsonResponseHandler());
        } else {
            $whoops->pushHandler(new \Whoops\Handler\PrettyPageHandler());
        }

        return new \Illuminate\Http\Response(
            $whoops->handleException($e),
            $e->getStatusCode(),
            $e->getHeaders()
        );
    }
}