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Error4 reports

Fix AssertionError

in PyTorch

Solution

AssertionError in PyTorch Inductor often arises from stride mismatches during tensor layout optimization, particularly in convolutional operations. This happens when the predicted strides of a tensor after a series of operations don't align with the actual strides. To fix it, carefully inspect the stride calculations within Inductor's layout propagation rules, ensuring they accurately reflect the effects of operations like convolution, transpose, and reshaping; manually override the predicted layout if necessary using `Layout.set_stride` or disabling targeted layout optimizations with `torch._dynamo.config.force_layout_optimization = False`.

Timeline

First reported:May 16, 2026
Last reported:May 16, 2026

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Fix AssertionError in PyTorch | Change8