Android Studio3.0编译的时候遇到Build Config field cannot have a null parameter错误

buildConfigField "String", "FIR_TOKEN", hasLocalProperty("FIR_TOKEN_STRING") ? getLocalProperty("FIR_TOKEN_STRING") : System.getenv("FIR_TOKEN")
        buildConfigField "String", "FIR_ID", hasLocalProperty("FIR_ID_STRING") ? getLocalProperty("FIR_ID_STRING") : System.getenv("FIR_ID")

Bug提示在这里