Yes. a temporal string that is created by str(), should be released after putting in the ‘temp_string’. but it still crashes even when I use str() instead of str().c_str(). The string should be deep-copied, not referred in this time. it only happens on iPhone XS. I’m going to dig deeper.
Currently, I think working around this is not an option because I already found there are several potential crash points like this in a lot of the third party libraries. I can’t just fix them all.