我混淆搞不定啊，求教

[2016-07-25 15:05:15 - Inspection] Proguard returned with error code 1. See console
[2016-07-25 15:05:15 - Inspection] Note: there were 2463 duplicate class definitions.
[2016-07-25 15:05:15 - Inspection] You should check if you need to specify additional program jars.
[2016-07-25 15:05:15 - Inspection] Unexpected error while evaluating instruction:
[2016-07-25 15:05:15 - Inspection] Class = [android/support/design/widget/Snackbar]
[2016-07-25 15:05:15 - Inspection] Method = [animateViewOut(I)V]
[2016-07-25 15:05:15 - Inspection] Instruction = [47] invokevirtual #91
[2016-07-25 15:05:15 - Inspection] Exception = java.lang.IllegalArgumentException)
[2016-07-25 15:05:15 - Inspection] Unexpected error while performing partial evaluation:
[2016-07-25 15:05:15 - Inspection] Class = [android/support/design/widget/Snackbar]
[2016-07-25 15:05:15 - Inspection] Method = [animateViewOut(I)V]
[2016-07-25 15:05:15 - Inspection] Exception = java.lang.IllegalArgumentException)
[2016-07-25 15:05:15 - Inspection] Error: Can't find any super classes of android/support/design/widget/Snackbar$7
以上是报的错误信息，但我根本没用到过Snackbar。

05:15 - Inspection] Note: there were 2463 duplicate class definitions.
[2016-07-25 15:05:15 - Inspection] You should check if you need to specify additional program jars.
[2016-07-25 15:05:15 - Inspection] Unexpected error while evaluating instruction:
[2016-07-25 15:05:15 - Inspection] Class = [android/support/design/widget/Snackbar]
[2016-07-25 15:05:15 - Inspection] Method = [animateViewOut(I)V]
[2016-07-25 15:05:15 - Inspection] Instruction = [47] invokevirtual #91
[2016-07-25 15:05:15 - Inspection] Exception = java.lang.IllegalArgumentException)
[2016-07-25 15:05:15 - Inspection] Unexpected error while performing partial evaluation:
[2016-07-25 15:05:15 - Inspection] Class = [android/support/design/widget/Snackbar]
[2016-07-25 15:05:15 - Inspection] Method = [animateViewOut(I)V]
[2016-07-25 15:05:15 - Inspection] Exception = java.lang.IllegalArgumentException)
[2016-07-25 15:05:15 - Inspection] Error: Can't find any super classes of android/support/design/widget/Snackbar$7