build anchovy,find a bug when build utils.lib

[FrankLike]

Hi,MrSmith,
Compilation failed:
import\anchovy\utils\rect.d(110): Error: 
'dlib.math.utils.clampValue!uint.clamp' is not nothrow

import\anchovy\utils\rect.d(114): Error: 
'dlib.math.utils.clampValue!uint.clamp' is not nothrow

import\anchovy\utils\rect.d(119): Error: 
'dlib.math.utils.clampValue!uint.clamp' is not nothrow

import\anchovy\utils\rect.d(123): Error: 
'dlib.math.utils.clampValue!uint.clamp' is not nothrow

import\anchovy\utils\rect.d(106): Error: function 
'anchovy.utils.rect.Rect.clampSize' is nothrow yet may throw

lib\debug\utils.lib

  Warning 2: File Not Found lib\debug\utils.lib

bin\guidemo.obj(guidemo)

  Error 42: Symbol Undefined 
_D7anchovy5utils14flexib醥bject€姁access6bindToFC€煼6€垚property9IP€噴€换DFS3std7variant17__T8V€啀NVk20Z€墡Z€v
....
Thank you.