Error parsing JSON @1:9: No such field: @type

[darkdef]

What version of protobuf and what language are you using?
4.29.2
Language: PHP

What operating system (Linux, Windows, ...) and version? Linux Mint 22 Cinnamon

What runtime / compiler are you using (e.g., python version or gcc version) PHP 8.1.31 / PHP 8.0.30

What did you do?

I have generated class
class CreateSessionResult extends \Google\Protobuf\Internal\Message

// $jsonResult contain: {"@type":"type.googleapis.com/Ydb.Table.CreateSessionResult","sessionId":"my_string"}

$mess = new CreateSessionResult();
$mess->mergeFromJsonString($jsonResult);

What did you expect to see

working code without error

What did you see instead?

Error parsing JSON @1:9: No such field: @type

Anything else we should know about your project / environment

for Any this fixed in #4502

[darkdef]

with flag $ignore_unknown=true - all work
$mess->mergeFromJsonString($jsonResult, true);

But without ext-protobuf (use package google/protobuf) - flag not needed.