Lunny Xiao ef9a0370ca Fix panic when diff (#9187) ... * fix panic when diff * improve code		2019-11-28 17:05:57 +08:00
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refs	Fix panic when diff (#9187)	2019-11-28 17:05:57 +08:00
HEAD	Fix panic when diff (#9187)	2019-11-28 17:05:57 +08:00