[10.x] Fix in appendExceptionToException method exception type check

[t1nkl]

While testing, there can be an error, with some 3d party requests/code (RabbitMQ connect, wss conect, gRPC connect, etc.), that doesn't hande correctly.

Without this fix, any errors related to such tests, showing in console like - Error: Call to a member function getMessage() on string on vendor/laravel/framework/src/Illuminate/Testing/TestResponse.php:1654

[dennisprudlo]

The doc states a Throwable must be passed here and throwables have always a getMessage method. Is this something that was changed recently? Otherwise the method is called incorrectly by those third party packages.

[t1nkl]

The doc states a Throwable must be passed here and throwables have always a getMessage method. Is this something that was changed recently? Otherwise the method is called incorrectly by those third party packages.

No, the problem happens, when you using php sockets
https://www.php.net/manual/en/book.sockets.php

Some connection errors not a Exception or Throwable - just string

Using official libraries:

• https://github.com/php-amqplib/php-amqplib
• https://github.com/grpc/grpc-php