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gh-135241: Changed the opcode of _pickle module to look for 00 and 01 specifically #135242

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@Legoclones Legoclones commented Jun 8, 2025

The python pickle module looks for "00" and "01" but _pickle only looked for 2 characters that parsed to 0 or 1, meaning some payloads like "+0" or " 0" would lead to different results in different implementations. See more details in the linked issue.

This solution simply checks for the hard-coded chars ensuring no edge cases go by.

The python pickle module looks for "00" and "01" but _pickle only looked for 2 characters that parsed to 0 or 1, meaning some payloads like "+0" or " 0" would lead to different results in different implementations
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Please add tests.

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