What version of gRPC and what language are you using?

php 7.2.11
grpc 1.21.3

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

Ubuntu 18.04.1 LTS

What runtime / compiler are you using (e.g. python version or version of gcc)

gcc version 7.3.0

What did you do?

I installed the library google/cloud-firestore to use FireStore database

What did you expect to see?

Save and search documents in FireStore with PHP

What did you see instead?

When I running the command to instantiated class, I receive the error

php: /php-7.2.11/Zend/zend_hash.c:1164: zend_hash_str_del: Assertion `((ht)->gc.refcount == 1) || ((ht)->u.flags & (1<<6))' failed.

Aborted (core dumped)