Fix mis-compilation of by-reference nullsafe operator

Fixes oss-fuzz #60011
Closes GH-11540

Co-authored-by: Dmitry Stogov <dmitry@zend.com>
Co-authored-by: Niels Dossche <77

Fix mis-compilation of by-reference nullsafe operator

Fixes oss-fuzz #60011
Closes GH-11540

Co-authored-by: Dmitry Stogov <dmitry@zend.com>
Co-authored-by: Niels Dossche <7771979+nielsdos@users.noreply.github.com>

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