sympy__sympy-20442

convert_to seems to combine orthogonal units

Verdict: the fix is stated in the issue (Tier A).

`solve_least_squares` finds the solution to the matrix equation. In case no solution is found (like in `convert_to(joule*second, joule)`), it approximates to an inexact solution to the matrix system instead of raising an exception.

The text states the fix: “`solve_least_squares` finds the solution to the matrix equation. In case no solution is found (like in `convert_to(joule*second, joule)`), it approximates to an inexact…”

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