Compilation error: exit status 1

[AbianTang]

/Users/xingmu/Documents/Arduino/libraries/DS18B20/src/DS18B20.cpp: In member function 'uint8_t DS18B20::getResolution()':
/Users/xingmu/Documents/Arduino/libraries/DS18B20/src/DS18B20.cpp:101:1: error: control reaches end of non-void function [-Werror=return-type]
101 | }
| ^
cc1plus: some warnings being treated as errors

exit status 1

Compilation error: exit status 1