Redis [BUG]redis-check-rdb can't check rdb with functions in unstable branch

A short description of the bug.

Chens-MacBook-Pro:test leon$ ~/Workspace/redis/src/redis-check-rdb ./dumpV10.rdb
[offset 0] Checking RDB file ./dumpV10.rdb
[offset 32] AUX FIELD redis-ver = '255.255.255'
[offset 46] AUX FIELD redis-bits = '64'
[offset 58] AUX FIELD ctime = '1642516498'
[offset 73] AUX FIELD used-mem = '1733680'
[offset 91] AUX FIELD repl-stream-db = '0'
[offset 141] AUX FIELD repl-id = 'edc44ba1910aab71e20a847573a27454d3cd9880'
[offset 159] AUX FIELD repl-offset = '74954'
[offset 175] AUX FIELD aof-preamble = '0'
--- RDB ERROR DETECTED ---
[offset 176] Invalid object type: 246
[additional info] While doing: read-type
[additional info] Reading type 0 (string)
[info] 0 keys read
[info] 0 expires
[info] 0 already expired

To reproduce

see rdb in attachment

Steps to reproduce the behavior and/or a minimal code sample.

git revision number 99ab4236afb210dc118fad892210b9fbb369aa8e

Expected behavior

A description of what you expected to happen.

no error

Additional information

Any additional information that is relevant to the problem.