Core:
    Fixed bug #8176 (Enum values in property initializers leak).
    Fixed freeing of internal attribute arguments.
    Fixed bug #8070 (memory leak of internal function attribute hash).
    Fixed bug #8160 (ZTS support on Alpine is broken).
Filter:
    Fixed signedness confusion in php_filter_validate_domain().
Intl:
    Fixed bug #8115 (Can't catch arg type deprecation when instantiating Intl classes).
    Fixed bug #8142 (Compilation error on cygwin).
    Fixed bug #7734 (Fix IntlPartsIterator key off-by-one error and first key).
MBString:
    Fixed bug #8208 (mb_encode_mimeheader: $indent functionality broken).
MySQLi:
    Fixed bug #8068 (mysqli_fetch_object creates inaccessible properties).
Pcntl:
    Fixed bug #8142 (Compilation error on cygwin).
PgSQL:
    Fixed result_type related stack corruption on LLP64 architectures.
    Fixed bug #8253 (pg_insert() fails for references).
Sockets:
    Fixed Solaris builds.
SPL:
    Fixed bug #8121 (SplFileObject - seek and key with csv file inconsistent).
    Fixed bug #8192 (Cannot override DirectoryIterator::current() without return typehint in 8.1).
Standard:
    Fixed bug #8048 (Force macOS to use statfs).