[Following this comment](https://github.com/esp8266/Arduino/commit/04fe8e8b58707147b751cc45b8b97adb7bacace5#r94540003) [Change would be there](https://github.com/esp8266/Arduino/blob/137d421fdd27fc612c8a63ec6dda02a14a28771f/cores/esp8266/WString.cpp#L250) Cc: @MacDada