Call to C++ JNI NewStringUTF crashes android app w

问题:

I am trying to solve a Cocos2d-x Keyboard input crash on Android 5.x when I create CCImage from the text with many emoji found on the keyboard (some work though, but most don't.) On Android 4.x several of the devices just display mangled text/extra characters. The source of the crash is the JNI's NewStringUTF() call. It simply does not support all of the 2, 3 and 4 byte utf-8 characters in Android 5/Lollipop.

This crash happens on cocos2d-x v2.2.6 (and confirmed on 3.x) using NDK 10e with Toolchain 4.8 (not sure if any of that makes too much of a difference, we were using 9d prior to moving to Android Studio and I am certain we had this issue, but there was much less usage to lollipop.)

If you never push any of non-modified utf-8 symbols (i.e. stick to ascii) you'll probably never see the issue.

Log Cat:
    12-11 01:02:17.460 10451-10959/com.appsomniacs.da2.debug A/art: sart/runtime/check_jni.cc:65]     string: '