## Description I want to add an axis to an input, so I try to use Symbol.reshape with arg shape=(1, -2), but it fails with a cryptic message. Is there any workaround ?
## Environment info (Required) - Linux setup using https://raw.githubusercontent.com/apache/incubator-mxnet/1.2.1/ci/docker/install/ubuntu_core.sh (actually in a Docker) - MXNet 1.2.1, scala 2.11.11 ## Error Message: ``` [error] (run-main-0) org.apache.mxnet.MXNetError: Error in operator reshape0: [16:14:49] src/operator/tensor/./matrix_op-inl.h:187: Check failed: oshape.Size() == dshape.Size() (2 vs. 4) Target shape size is different to source. Target: [1,2] [error] Source: [2,2] [error] [error] Stack trace returned 10 entries: [error] [bt] (0) /tmp/mxnet2259072593884902973/mxnet-scala(dmlc::StackTrace[abi:cxx11]()+0x1bc) [0x7f705d82c4fc] [error] [bt] (1) /tmp/mxnet2259072593884902973/mxnet-scala(dmlc::LogMessageFatal::~LogMessageFatal()+0x28) [0x7f705d82d718] [error] [bt] (2) /tmp/mxnet2259072593884902973/mxnet-scala(mxnet::op::ReshapeShape(nnvm::NodeAttrs const&, std::vector<nnvm::TShape, std::allocator<nnvm::TShape> >*, std::vector<nnvm::TShape, std::allocator<nnvm::TShape> >*)+0xa1c) [0x7f705df3886c] [error] [bt] (3) /tmp/mxnet2259072593884902973/mxnet-scala(+0x20b0d61) [0x7f705f481d61] [error] [bt] (4) /tmp/mxnet2259072593884902973/mxnet-scala(mxnet::exec::InferShape(nnvm::Graph&&, std::vector<nnvm::TShape, std::allocator<nnvm::TShape> >&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)+0x1a7f) [0x7f705f483ebf] [error] [bt] (5) /tmp/mxnet2259072593884902973/mxnet-scala(mxnet::exec::GraphExecutor::Init(nnvm::Symbol, mxnet::Context const&, std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, mxnet::Context, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, mxnet::Context> > > const&, std::vector<mxnet::NDArray, std::allocator<mxnet::NDArray> > const&, std::vector<mxnet::NDArray, std::allocator<mxnet::NDArray> > const&, std::vector<mxnet::OpReqType, std::allocator<mxnet::OpReqType> > const&, std::vector<mxnet::NDArray, std::allocator<mxnet::NDArray> > const&, mxnet::Executor*, std::unordered_map<nnvm::NodeEntry, mxnet::NDArray, nnvm::NodeEntryHash, nnvm::NodeEntryEqual, std::allocator<std::pair<nnvm::NodeEntry const, mxnet::NDArray> > > const&)+0x10ed) [0x7f705f461f3d] [error] [bt] (6) /tmp/mxnet2259072593884902973/mxnet-scala(mxnet::Executor::Bind(nnvm::Symbol, mxnet::Context const&, std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, mxnet::Context, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, mxnet::Context> > > const&, std::vector<mxnet::NDArray, std::allocator<mxnet::NDArray> > const&, std::vector<mxnet::NDArray, std::allocator<mxnet::NDArray> > const&, std::vector<mxnet::OpReqType, std::allocator<mxnet::OpReqType> > const&, std::vector<mxnet::NDArray, std::allocator<mxnet::NDArray> > const&, mxnet::Executor*)+0xe0) [0x7f705f463510] (...) [error] at org.apache.mxnet.Base$.checkCall(Base.scala:131) [error] at org.apache.mxnet.Symbol.bindHelper(Symbol.scala:786) [error] at org.apache.mxnet.Symbol.bind(Symbol.scala:711) [error] at ReshapeTest$.delayedEndpoint$ReshapeTest$1(tt.scala:72) [error] at ReshapeTest$delayedInit$body.apply(tt.scala:67) [error] at scala.Function0$class.apply$mcV$sp(Function0.scala:34) [error] at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12) [error] at scala.App$$anonfun$main$1.apply(App.scala:76) [error] at scala.App$$anonfun$main$1.apply(App.scala:76) [error] at scala.collection.immutable.List.foreach(List.scala:392) [error] at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:35) [error] at scala.App$class.main(App.scala:76) [error] at ReshapeTest$.main(tt.scala:67) [error] at ReshapeTest.main(tt.scala) ``` ## Minimum reproducible example ```scala import org.apache.mxnet._ val a = Symbol.Variable("a") val r = Symbol.reshape()(a)(Map("shape" -> (1,-2))) val exec = r.bind(Context.defaultCtx, Map( "a" -> NDArray.array(Array(1, 2, 3, 4), Shape(2,2)) )) exec.forward() ``` [ Full content available at: https://github.com/apache/incubator-mxnet/issues/12425 ] This message was relayed via gitbox.apache.org for [email protected]
