panic: index out of range

[yg7001]

func getONNXInputSize(onnxFilePath string) {
	backend:=simple.NewSimpleGraph()
	//backend:=gorgonnx.NewGraph()
	model  := onnx.NewModel(backend)	
	// read the onnx model
	b, err := utils.LoadFileBytes(onnxFilePath)
	if err!=nil{
		fmt.Println("read file error ",onnxFilePath,err)
		panic(err)
	}
	if len(b)==0{
		fmt.Println("onnf file error with lenght 0")
	}
	// Decode it into the model
	err = model.UnmarshalBinary(b)   // panic goes here!!!!!!!!!!!!!!!!!!!!!!!!
	if err!=nil{
		fmt.Println("parse onnx failure",err)
		panic(err)
	}
	inputs := model.GetInputTensors()
	if len(inputs) == 0 {
		fmt.Println("No inputs found in the ONNX model")
	}
	input := inputs[0]

	dims := input.Dims()
	fmt.Println("Input image dimensions:", dims)
}

output:
panic: runtime error: index out of range [0] with length 0

goroutine 1 [running]:
gorgonia.org/tensor.StdEng.makeArray({{}}, 0xc00015adb8, {{0x831c20?, 0x721f60?}}, 0x0)
D:/golangdev/work/pkg/mod/gorgonia.org/tensor@v0.9.3/defaultengine.go:22 +0xec
gorgonia.org/tensor.(*Dense).makeArray(0xc00015ad80, 0x0)
D:/golangdev/work/pkg/mod/gorgonia.org/tensor@v0.9.3/dense.go:87 +0xe2
gorgonia.org/tensor.(*Dense).fix(0xc00015ad80)
D:/golangdev/work/pkg/mod/gorgonia.org/tensor@v0.9.3/dense.go:292 +0x1c5
gorgonia.org/tensor.New({0xc001cb4920, 0x3, 0x1?})
D:/golangdev/work/pkg/mod/gorgonia.org/tensor@v0.9.3/tensor.go:93 +0xb8
github.com/owulveryck/onnx-go/internal/onnx/ir.(*TensorProto).Tensor(0xc000141e60)
D:/golangdev/work/pkg/mod/github.com/owulveryck/onnx-go@v0.5.0/internal/onnx/ir/tensor.go:51 +0x5e5
github.com/owulveryck/onnx-go.toOperationAttribute(0xc0000c6100)
D:/golangdev/work/pkg/mod/github.com/owulveryck/onnx-go@v0.5.0/attributes.go:30 +0x109
github.com/owulveryck/onnx-go.toOperationAttributes({0xc00000a710, 0x1, 0xc0000afbf0?})
D:/golangdev/work/pkg/mod/github.com/owulveryck/onnx-go@v0.5.0/attributes.go:10 +0x6c
github.com/owulveryck/onnx-go.(*Model).applyModelProtoGraphNodeOperations(0xc00010bce0, 0xc000100500?)
D:/golangdev/work/pkg/mod/github.com/owulveryck/onnx-go@v0.5.0/decoder.go:235 +0x10d
github.com/owulveryck/onnx-go.(*Model).applyModelProtoGraph(0xc00010bce0, 0xc000132210)
D:/golangdev/work/pkg/mod/github.com/owulveryck/onnx-go@v0.5.0/decoder.go:149 +0x299
github.com/owulveryck/onnx-go.(*Model).decodeProto(0xc000198000?, 0x1b0853b?)
D:/golangdev/work/pkg/mod/github.com/owulveryck/onnx-go@v0.5.0/decoder.go:112 +0x105
github.com/owulveryck/onnx-go.(*Model).UnmarshalBinary(0x7a3222?, {0xc000198000, 0x1b0853b, 0x1b0853c})
D:/golangdev/work/pkg/mod/github.com/owulveryck/onnx-go@v0.5.0/decoder.go:38 +0x75
main.getONNXInputSize({0x7a3222, 0x24})
D:/GolangDev/learnings/testGoCV/yolov3.go:256 +0x277
main.testYolo()
D:/GolangDev/learnings/testGoCV/yolov3.go:27 +0x3a
main.main()
D:/GolangDev/learnings/testGoCV/main.go:27 +0x17
exit status 2

[annatelegina]

Hello! I have the same error, have you found the solution? I can not identify where the problem is.

[BerndCzech]

I am running into the same issue - I guess 209 is just a copy of it.

[BerndCzech]

I found 184 also ran into the issue. As this is long ago with no solution i guess there is no known fix to it.

[BerndCzech]

It might help to know that s is of length 0 in /home/bernd/go/pkg/mod/gorgonia.org/tensor@v0.9.3/defaultengine.go:16:

func (e StdEng) makeArray(arr *array, t Dtype, size int) {
	memsize := calcMemSize(t, size)
	s := make([]byte, memsize)
	arr.t = t
	arr.L = size
	arr.C = size
	arr.Ptr = unsafe.Pointer(&s[0])
	arr.fix()
}

So this is why s[0] panics.

The depending project knows of the issue from tests but seems to regard this as an artifact. Thus I presume onnx-go should avoid calling their api with size = 0.