8000 Check that vectors are not passed to matrix.block by user202729 · Pull Request #40277 · sagemath/sage · GitHub
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Check that vectors are not passed to matrix.block #40277

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Check that vectors are not passed to matrix.block #40277

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@user202729 user202729 commented Jun 21, 2025 •
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Currently if a vector is passed in, the following happens

sage: matrix.block([
....:     [matrix.zero(2), vector([0]*2)],
....:     ])
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
...
ValueError: insufficient information to determine dimensions.

sage: matrix.block([
....:     [matrix.zero(2), vector([0]*2)],
....:     [0, matrix.zero(2)],
....:     ])
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
...
TypeError: ring must be a ring

which is rather confusing. This gives a more descriptive error message.

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