Description:
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Similar to bug #77359, the function spl_find_ce_by_name has use-after-free of a zend_string and causes segfault. This affects functions class_parents, class_implements and class_uses. This bug is caused by commit 084c17fe0b68d391467fd48a14433443d4fcba81.

Test script:
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<?php
$a = md5(""); # Create a non-interned string.
@class_uses($a, false); # Invalid free.
@class_uses($a, false); # Use after free.
echo "{$a} + foo\n"; # Use after free.
# Notice how "foo" is not printed even if the code does not crash.
# Run it a few times to get a crash.
?>

Expected result:
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No crash and full output.

Actual result:
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Crash or truncated output.