Symfony version(s) affected: 4.2.0-beta2

Description
Since uploaded files are displayed in the profiler, each time a Request with at least one UploadedFile is profiled, a FileNotFoundException is thrown. This happens because the UploadedFile method was called and was successful.

It's was probably introduced in #26946.

How to reproduce
Create a new Symfony 4.2 project with the profiler and setup file upload like explained in the documentation (https://symfony.com/doc/current/controller/upload_file.html).

Then choose a file, submit the form.

Additional context