Conflicting Sandwich clues cause infinite loop
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marknn3 commented
When a single row or column contains 2 conflicting Sandwich clues, the solver gets stuck in an infinite loop.
Here is an example f-puzzles link.
Interestingly, when the same 2 sandwich clues are places on row 1 (top row) then the solver finishes correctly with no solution.
Correct behaviour f-puzzles link.