cannot be empty

report error if dynamics are used if dynamics are not enabled,
to prevent crashes while compiling

and is explicitly imported

fix checking of kind * for type synonyms,
check if * occurs on the left of an algebraic type definition if * is used
in a constructor (for all constructors, not just the first one)

of arity>0 (prevents compiler crash), rename some functions that
check instances

instead of using ++ to concatenate the lists for each call

instead of using ++ to concatenate the lists for each call

compare module number and symbol number as well, instead of just the name of the ident

components_importing_module_a

2 tuples, instead build both lists immediately

a list of not exported symbols

component once, instead of doing this for every symbol