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在执行反向传播的时候，报出来的错，不知道应该怎么解决。
[WARNING] DEVICE(191810,python):2021-03-09-09:02:28.661.196 [mindspore/ccsrc/runtime/device/ascend/ascend_kernel_runtime.cc:555] TaskFailCallback] Task fail infos task_id: 1, stream_id: 0, tid: 192364, device_id: 2, error msg: aicore exception
[WARNING] DEVICE(191810,python):2021-03-09-09:02:28.661.902 [mindspore/ccsrc/runtime/device/ascend/ascend_kernel_runtime.cc:555] TaskFailCallback] Task fail infos task_id: 30863, stream_id: 522, tid: 192364, device_id: 2, error msg: aicore exception
[ERROR] RUNTIME(192016)kernel task happen error, retCode=0x26, [aicore exception].
[ERROR] RUNTIME(192016)aicore kernel execute failed, device_id=2, stream_id=522, task_id=30863, fault kernel_name=UnsortedSegmentSum_15923191048774912737_2__kernel0, func_name=UnsortedSegmentSum_15923191048774912737_2__kernel0
[ERROR] DEVICE(191810,python):2021-03-09-09:02:28.842.662 [mindspore/ccsrc/runtime/device/ascend/ascend_kernel_runtime.cc:717] SyncStream] Call runtime rtStreamSynchronize error.
[ERROR] SESSION(191810,python):2021-03-09-09:02:28.842.711 [mindspore/ccsrc/backend/session/ascend_session.cc:1546] SyncStream] Sync stream error!