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MiniZinc

/***
!Test
expected:
- !Result
solution: !Solution
objective: 0
x: !!set {}
y: 0
***/
% Prior to r9313, mzn2fzn would "improve" the bounds on y incorrectly.
% In particular the lower bound would be set to 1 rather than 0.
%
var set of 1..15: x;
var -100..100: y;
constraint y = card(x);
solve minimize y;
output ["y = ", show(y), ";\n"];