Cursor name can duplicate parameter and variable names in procedures and functions

[asfernandes]

We do not allow duplicate names of cursor, variable and parameter names in execute block.

But we're allowing cursor names to use same names as procedure/function parameters and variables:

create function f1 (x integer) returns integer
as
    declare x cursor for (select 1 n from rdb$database);
    declare y integer;
    declare y cursor for (select 1 n from rdb$database);
begin
end!

create procedure p1 (x integer)
as
    declare x cursor for (select 1 n from rdb$database);
    declare y integer;
    declare y cursor for (select 1 n from rdb$database);
begin
end!