- auto jclassname = (jstring)env->CallObjectMethod(cls, tostr_id, nullptr);
- const char* classname = env->GetStringUTFChars(jclassname, nullptr);
+ auto jclassname = (jstring)env->CallObjectMethod(cls, tostr_id, nullptr);
+ jstring_wrapper classname(env, jclassname);
+ auto msg = std::string("Cannot find method") + name + "(" + signature + ") in " + classname.value;