OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=38001
Crash type: Heap-use-after-free READ 1 Crash state: i_zval_ptr_dtor concat_function zend_binary_op
{ "severity": "HIGH" }
"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/php/OSV-2021-1199.yaml"