IndexOutOfRangeException: Index was outside the bounds of the array.

FairyGUI.TextField 当前需要存储比较多的文本内容，报错了，FairyGUI.TextField是不是有大小的限制呢？
 03-22 07:57:01.008   945  1021 I chatty  : uid=1000(system) AALMain identical 3 lines
03-22 07:57:01.024   945  1021 D AAL     : DRECurveCalculation: BLKNUM = 16 8
03-22 07:57:01.025 25204 25227 E Unity   : IndexOutOfRangeException: Index was outside the bounds of the array.
03-22 07:57:01.025 25204 25227 E Unity   :   at System.String.get_Chars (System.Int32 index) [0x00000] in <00000000000000000000000000000000>:0
03-22 07:57:01.025 25204 25227 E Unity   :   at FairyGUI.TextField.BuildMesh () [0x00000] in <00000000000000000000000000000000>:0
03-22 07:57:01.025 25204 25227 E Unity   :   at FairyGUI.TextField.Redraw () [0x00000] in <00000000000000000000000000000000>:0
03-22 07:57:01.025 25204 25227 E Unity   :   at FairyGUI.RichTextField.Update (FairyGUI.UpdateContext context) [0x00000] in <00000000000000000000000000000000>:0
03-22 07:57:01.025 25204 25227 E Unity   :   at FairyGUI.Container.Update (FairyGUI.UpdateContext context) [0x00000] in <00000000000000000000000000000000>:0
03-22 07:57:01.025 25204 25227 E Unity   :   at FairyGUI.Container.Update (FairyGUI.UpdateContext context) [0x00000] in <00000000000000000000000000000000>:0
03-22 07:57:01.025 25204 25227 E Unity   :   at FairyGUI.Container.Update (FairyGUI.UpdateContext context) [0x00000] in <00000000000000000000000000000000>:0
03-22 07:57:01.025 25204 25227 E Unity   :   at FairyGUI.Container.Update (FairyGUI.UpdateContext context) [0x00000] in <00000000000000000000000000000000>:0
03-22 07:57:01.025 25204 25227 E Unity   :   at FairyGUI.Container.Update (FairyGUI.UpdateContext context) [0x00000] in <00000000000000000000000