[GitHub] [tvm] mbrookhart commented on pull request #7487: [Relay] Enforce static dim for non-concat axis if one or more tensors have static dim

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mbrookhart commented on pull request #7487:
URL: https://github.com/apache/tvm/pull/7487#issuecomment-785376392


   My main concern with this, and please correct me if I'm wrong, is concatenating something like shape [1, 3] and shape [1, ?] on axis 1. In that case, I believe this will return [2, 3], and we don't do any runtime checks on the second argument. If the model is wrong, and, say, the input comes in as [1, 2] instead of [1, 3], we'll end up with a runtime segfault in generated code, which is very difficult to debug.


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