duplicate_modes.m:001: Warning: interface for module `duplicate_modes' does not
duplicate_modes.m:001:   export anything.
duplicate_modes.m:001: To be useful, a module should export something. A file
duplicate_modes.m:001:   should contain at least one declaration other than
duplicate_modes.m:001:   `:- import_module' in its interface section(s). This
duplicate_modes.m:001:   would normally be a `:- pred', `:- func', `:- type',
duplicate_modes.m:001:   `:- inst' or `:- mode' declaration.
duplicate_modes.m:008: In mode declarations for predicate
duplicate_modes.m:008:   `duplicate_modes.q/2':
duplicate_modes.m:008:   error: duplicate mode declaration.
duplicate_modes.m:008:   Modes `q(in, out) is det' and
duplicate_modes.m:008:   `q((ground >> ground), (free >> ground)) is det' are
duplicate_modes.m:008:   indistinguishable.
duplicate_modes.m:009:   Here is the conflicting mode declaration.
duplicate_modes.m:008: In mode declarations for predicate
duplicate_modes.m:008:   `duplicate_modes.q/2':
duplicate_modes.m:008:   error: duplicate mode declaration.
duplicate_modes.m:008:   Modes `q(in, out) is det' and
duplicate_modes.m:008:   `q((ground >> ground), (free >> ground)) is det' are
duplicate_modes.m:008:   indistinguishable.
duplicate_modes.m:010:   Here is the conflicting mode declaration.
duplicate_modes.m:014: In mode declarations for predicate
duplicate_modes.m:014:   `duplicate_modes.r/2':
duplicate_modes.m:014:   error: duplicate mode declaration.
duplicate_modes.m:014:   Modes `r(in, in) is semidet' and `r(in, in) is det'
duplicate_modes.m:014:   are indistinguishable.
duplicate_modes.m:015:   Here is the conflicting mode declaration.