Pointer is checked against null but then dereferenced anyway

Defect 105003 (STATIC_C)
Checker FORWARD_NULL (subcategory none)
File: /src/mongocxx/test/spec/change_stream.cpp
Function <unnamed>::____C_A_T_C_H____T_E_S_T____2()
/src/mongocxx/test/spec/change_stream.cpp, line: 165
Comparing "change_stream_tests_path" to null implies that "change_stream_tests_path" might be null.

        if (!change_stream_tests_path) {

/src/mongocxx/test/spec/change_stream.cpp, line: 169
Passing null pointer "change_stream_tests_path" to "basic_string", which dereferences it.

        std::string path = change_stream_tests_path;