meet "Unexpected branch" error in CacheOnePassInMemory

[gaoshan2006]

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[gaoshan2006]

After I compiled and installed, I run the demo "export PYTHONPATH=pwd ./train.sh". But the test case run some time, an error occurs as bellows:
.......................................................
I1209 17:43:14.912488 51984 TrainerInternal.cpp:205] _fc_layer_0.w0 avg_abs_val=0.0975923 max_val=0.270491 avg_abs_grad=1.54177 max_grad=2.47025
I1209 17:43:14.912603 51984 TrainerInternal.cpp:205] _fc_layer_0.wbias avg_abs_val=0.0126017 max_val=0.0126019 avg_abs_grad=2.51462 max_grad=2.51462

I1209 17:43:14.912660 51984 TrainerInternal.cpp:163] Batch=2000 samples=256000 AvgCost=0.202445 CurrentCost=0.167631 Eval: classification_error_evaluator=0.0825937 CurrentEval: classification_error_evaluator=0.0636719
I1209 17:43:14.912695 51984 DataProvider.h:351] the double-buffer is starting ...
F1209 17:43:14.912730 51984 PyDataProvider2.cpp:1009] Unexpected branch
*** Check failure stack trace: ***
@ 0x3fff9230cf8c (unknown)
@ 0x3fff9230fa0c (unknown)
@ 0x3fff9230c9b4 (unknown)
@ 0x3fff92310634 (unknown)
@ 0x102a9444 paddle::CacheOnePassInMemory::reset()
@ 0x102acb0c paddle::PyDataProvider2::resetImpl()
@ 0x102acde4 paddle::PyDataProvider2::reset()
@ 0x1033f098 paddle::Tester::testOnePeriod()
@ 0x10318ed4 paddle::Trainer::trainOnePass()
@ 0x1031cb40 paddle::Trainer::train()
@ 0x1013db50 main
@ 0x3fff91e64580 generic_start_main.isra.0
@ 0x3fff91e64774 __libc_start_main
@ (nil) (unknown)
/bin/paddle: line 81: 51984 Aborted ${DEBUGGER} $MYDIR/../opt/paddle/bin/paddle_trainer ${@:2}

I checked the source code, The error is from reset() in file "PyDataProvider2.cpp", It looks the code should not run into this branch normally. But why this error occurred ? Thanks

[gaoshan2006]

The error is from here:

virtual bool reset() {
if (objPool_->empty() && droppedPool_->empty()) {
return true;
} else if (objPool_->empty()) {
std::swap(objPool_, droppedPool_);
return false;
} else {
LOG(FATAL) << "Unexpected branch"; <--------why did code run into this branch ? }
}

[luotao1]

Too old to close this issue. If the problem is not resolved, please reopen the issue.