do not treat __halt_compiler() as an expression being executed

[pilif]

this fixes #6875

[orklah]

Thanks!

[pilif]

when reading this patch again, it occurred to me that the check for !($stmt instanceof PhpParser\Node\Stmt\InlineHTML) that's also being done is probably faulty:

<?php
exit(0);
?>
foo bar baz

I would expect this to be flagged as an issue because the text outside of the PHP tags is never emitted this way.

Would you agree? In that case, I'll create a followup issue and PR, though of course this might have some BC implications.

[weirdan]

@pilif yeah, please do.

[pilif]

See #6878