Symfony Issue Reproduction

This README outlines the steps to set up a Symfony project and reproduce the issue described in symfony/symfony#57902.

Setup

To create the project I took the following steps:

1. Create a new Symfony 6.4 project using the Symfony CLI
2. Install monolog (composer require monolog)
3. Applied the production monolog configuration to @dev
4. Created a controller that highlights the issue

Reproducing the Issue

Run the project

symfony serve

1. Go to http://127.0.0.1:8000/stream/no-issue, notice the logs

2. Go to http://127.0.0.1:8000/stream/issue, notice the logs

In the second request, the fingers_crossed handler did not include the 404 error from the logs.