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trunk/b7930e431f5b3a5d138bf9209b5c6decff9e7050: Fix SymBool equality handling in symbolic shapes (#186461)

发生了什么

I reviewed the implementation and confirm that the following AI-assisted summary accurately describes the change: SymBool equality can produce a SymPy relation whose operands are themselves boolean relations, such as Eq(Eq(u0, 1), Eq(u1, 1)) . Boolean-expression canonicalization and try_solve assumed relational operands were arithmetic expressions and subtracted them, causing expect_true to raise TypeError . This ch…

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