Frequently gets stuck after create relax.BlockBuilder()

Troubleshooting
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GIT_COMMIT_HASH: 1c60502cfba5ca4ed948e07bf6c064426418187d built by clang&clang++ 20.1.6 Code:

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And I also found that python are trying to allocate memory thus allocated about 20G and even more memory when stuck there

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And I also found that if I put the code just in .py file rather than in jupyter file there would be no bug