[Debug vs DI][TestSuite] Use a class name that does not actually exist #30936
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Using "Foo", a class name that corresponds to no less than 22 fixture
classes, results in the first found "Foo" being loaded when one is
found by the ClassNotFoundFatalErrorHandler error handler, I am not sure
exactly why, but it is not really a big issue because this is a fatal
error handler and execution is not supposed to continue after that.
Except that is very much the case when running the whole test suite
sequentially with ./phpunit . Then we arrive to the DI component test
suite, and a failure happens because \foo was not supposed to be defined: