bug150.m:014: In `car'(in) = out:
bug150.m:014:   error: implicit determinism declaration not satisfied.
bug150.m:014:   Declared `det', inferred `semidet'.
bug150.m:014:   The reason for the difference is the following.
bug150.m:018:   In argument 1 of clause head:
bug150.m:018:   unification of `HeadVar__1' and `list.[H | _T]' can fail.