yosys/tests/verilog/param_no_default_unbound_5.ys

read_verilog -sv <<EOF
module Example #(
    parameter X, Y = 2
);
endmodule
module top;
    Example #(.Y(1)) e();
endmodule
EOF

logger -expect error "Parameter `\\X' has no default value and has not been overridden!" 1
hierarchy -top top