sympy__sympy-13773

@ (__matmul__) should fail if one argument is not a matrix

Verdict: the issue points to the file or function that was changed (Tier B).

@ (__matmul__) should fail if one argument is not a matrix

The two checks disagreed (stated fix vs. points to it); the lower reading shown: “@ (__matmul__) should fail if one argument is not a matrix”

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