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<?php function foo(?string $bar = null, $x) {}
Output for git.master_jit, git.master
Deprecated: foo(): Optional parameter $bar declared before required parameter $x is implicitly treated as a required parameter in /in/5jms6 on line 3
Output for rfc.property-hooks
Deprecated: Optional parameter $bar declared before required parameter $x is implicitly treated as a required parameter in /in/5jms6 on line 3

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