larroy commented on issue #17043: Segmentation fault: 11 URL: https://github.com/apache/incubator-mxnet/issues/17043#issuecomment-581729152 ``` Thread 58 "test_regress_la" received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7fff6ebff700 (LWP 20624)] 0x00007ffff43b284a in __kmp_fork_call () from /home/piotr/mxnet/build/3rdparty/openmp/runtime/src/libomp.so (gdb) bt #0 0x00007ffff43b284a in __kmp_fork_call () from /home/piotr/mxnet/build/3rdparty/openmp/runtime/src/libomp.so #1 0x00007ffff4407b5d in __kmp_GOMP_fork_call () from /home/piotr/mxnet/build/3rdparty/openmp/runtime/src/libomp.so #2 0x00007ffff440cb1c in __kmp_api_GOMP_parallel_40_alias () from /home/piotr/mxnet/build/3rdparty/openmp/runtime/src/libomp.so #3 0x0000555556f514d3 in void mxnet::op::normal_op<mshadow::cpu, mxnet::op::SampleNormalParam>(nnvm::NodeAttrs const&, mxnet::OpContext const&, mxnet::OpReqType const&, mxnet::TBlob*) [clo ne .isra.685] () #4 0x0000555556f6c6e1 in void mxnet::op::Sample_<mshadow::cpu, mxnet::op::SampleNormalParam>(nnvm::NodeAttrs const&, mxnet::OpContext const&, std::vector<mxnet::TBlob, std::allocator<mxnet ::TBlob> > const&, std::vector<mxnet::OpReqType, std::allocator<mxnet::OpReqType> > const&, std::vector<mxnet::TBlob, std::allocator<mxnet::TBlob> > const&) () #5 0x0000555555915ca7 in mxnet::imperative::PushFCompute(std::function<void (nnvm::NodeAttrs const&, mxnet::OpContext const&, std::vector<mxnet::TBlob, std::allocator<mxnet::TBlob> > const &, std::vector<mxnet::OpReqType, std::allocator<mxnet::OpReqType> > const&, std::vector<mxnet::TBlob, std::allocator<mxnet::TBlob> > const&)> const&, nnvm::Op const*, nnvm::NodeAttrs const& , mxnet::Context const&, std::vector<mxnet::engine::Var*, std::allocator<mxnet::engine::Var*> > const&, std::vector<mxnet::engine::Var*, std::allocator<mxnet::engine::Var*> > const&, std::v ector<mxnet::Resource, std::allocator<mxnet::Resource> > const&, std::vector<mxnet::NDArray*, std::allocator<mxnet::NDArray*> > const&, std::vector<mxnet::NDArray*, std::allocator<mxnet::ND Array*> > const&, std::vector<unsigned int, std::allocator<unsigned int> > const&, std::vector<mxnet::OpReqType, std::allocator<mxnet::OpReqType> > const&)::{lambda(mxnet::RunContext)#1}::o perator()(mxnet::RunContext) const () #6 0x0000555555916427 in std::_Function_handler<void (mxnet::RunContext), mxnet::imperative::PushFCompute(std::function<void (nnvm::NodeAttrs const&, mxnet::OpContext const&, std::vector<m xnet::TBlob, std::allocator<mxnet::TBlob> > const&, std::vector<mxnet::OpReqType, std::allocator<mxnet::OpReqType> > const&, std::vector<mxnet::TBlob, std::allocator<mxnet::TBlob> > const&) > const&, nnvm::Op const*, nnvm::NodeAttrs const&, mxnet::Context const&, std::vector<mxnet::engine::Var*, std::allocator<mxnet::engine::Var*> > const&, std::vector<mxnet::engine::Var*, std ::allocator<mxnet::engine::Var*> > const&, std::vector<mxnet::Resource, std::allocator<mxnet::Resource> > const&, std::vector<mxnet::NDArray*, std::allocator<mxnet::NDArray*> > const&, std: :vector<mxnet::NDArray*, std::allocator<mxnet::NDArray*> > const&, std::vector<unsigned int, std::allocator<unsigned int> > const&, std::vector<mxnet::OpReqType, std::allocator<mxnet::OpReq Type> > const&)::{lambda(mxnet::RunContext)#1}>::_M_invoke(std::_Any_data const&, mxnet::RunContext&&) () #7 0x0000555555856675 in std::_Function_handler<void (mxnet::RunContext, mxnet::engine::CallbackOnComplete), mxnet::engine::ThreadedEngine::PushSync(std::function<void (mxnet::RunContext)> , mxnet::Context, std::vector<mxnet::engine::Var*, std::allocator<mxnet::engine::Var*> > const&, std::vector<mxnet::engine::Var*, std::allocator<mxnet::engine::Var*> > const&, mxnet::FnProp erty, int, char const*)::{lambda(mxnet::RunContext, mxnet::engine::CallbackOnComplete)#1}>::_M_invoke(std::_Any_data const&, mxnet::RunContext&&, mxnet::engine::CallbackOnComplete&&) () #8 0x0000555555861ed6 in mxnet::engine::ThreadedEngine::ExecuteOprBlock(mxnet::RunContext, mxnet::engine::OprBlock*) () #9 0x0000555555862547 in std::_Function_handler<void (std::shared_ptr<dmlc::ManualEvent>), mxnet::engine::ThreadedEnginePerDevice::PushToExecute(mxnet::engine::OprBlock*, bool)::{lambda()# 1}::operator()() const::{lambda(std::shared_ptr<dmlc::ManualEvent>)#1}>::_M_invoke(std::_Any_data const&, std::shared_ptr<dmlc::ManualEvent>&&) () #10 0x0000555555860c5a in std::thread::_State_impl<std::thread::_Invoker<std::tuple<std::function<void (std::shared_ptr<dmlc::ManualEvent>)>, std::shared_ptr<dmlc::ManualEvent> > > >::_M_ru n() () #11 0x00007ffff30b866f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #12 0x00007ffff41546db in start_thread (arg=0x7fff6ebff700) at pthread_create.c:463 #13 0x00007ffff277588f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 (gdb) ```
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