Out of bound signals generated by yosys

Hi, I have this error message during the synthesis under yosys

select out of bounds on signal

Warning: Range [9:0] select out of bounds on signal `\lane_class_mask': Setting 9 LSB bits to undef.

And I checked on the code part

https://github.com/openhwgroup/cvfpu/blob/0ad2cd7ff265fe6c9852faa87d296931e2cf380d/src/fpnew_opgroup_fmt_slice.sv#L279

Could you please have a check?

Best, redpanda