Reproduce env int key problem

Ref phpstan/phpstan#10833

Author: ondrejmirtes

.github/workflows/e2e-tests.yml

@@ -181,6 +181,9 @@ jobs:
               OUTPUT=$(../../bin/phpstan 2>&1)
               grep 'Result cache might not behave correctly' <<< "$OUTPUT"
               grep 'ResultCache8E2E\\CustomRule' <<< "$OUTPUT"
+          - script: |
+              cd e2e/env-int-key
+              env 1=1 ../../bin/phpstan analyse test.php
 
     steps:
       - name: "Checkout"

e2e/env-int-key/test.php

@@ -0,0 +1 @@
+<?php