_transform.SimplifyInference() causes segmentation fault during quantization

I encountered segmentation fault when quantizing the following ssd models:

'ssd_512_resnet50_v1_voc',
'ssd_512_resnet50_v1_coco',
'ssd_512_resnet101_v2_voc',
'ssd_512_mobilenet1.0_voc',
'ssd_512_mobilenet1.0_coco',

I found the error occurs at

prerequisite_optimize(mod, params=None)

in

tvm/relay/quantize.quantize.py

More specifically, the error is caused by

_transform.SimplifyInference()

, which calls the C++ function

Expr SimplifyInference(const Expr& e) { return InferenceSimplifier().Mutate(e); }

in

src/relay/transforms/simplify_inference.cc

I’m not sure how to debug from here as I’m not very familiar with C++. Any help is appreciated.