From @drforr

This should likely report the missing definition of C<LIB>, but instead
it throws 'Cannot invoke this object...' with no file or line number
attached. And, while I imagine REPR​: Null is referring to the fact that
native() isn't being passed an object, it's still a bit unclear.

Sample source​:

--cut here--
use v6;
use NativeCall;
sub rl_unbind_key( Int ) returns Int is native( LIB ) { * }
--cut here--

Error that I get​:

--cut here--
perl6-readline$ perl6 ./bug.t
===SORRY!===
Cannot invoke this object (REPR​: Null, cs = 0)
--cut here--

From @jnthn

On Thu May 21 06​:17​:37 2015, drforr@​pobox.com wrote​:

This should likely report the missing definition of C<LIB>, but instead
it throws 'Cannot invoke this object...' with no file or line number
attached. And, while I imagine REPR​: Null is referring to the fact that
native() isn't being passed an object, it's still a bit unclear.

Sample source​:

--cut here--
use v6;
use NativeCall;
sub rl_unbind_key( Int ) returns Int is native( LIB ) { * }
--cut here--

Error that I get​:

--cut here--
perl6-readline$ perl6 ./bug.t
===SORRY!===
Cannot invoke this object (REPR​: Null, cs = 0)
--cut here--

Now it reports​:

===SORRY!=== Error while compiling bug3.p6
Undeclared name​:
  LIB used at line 3

Which should be rather more helpful. Added a test to cover it in S32-exceptions/misc.t.

The RT System itself - Status changed from 'new' to 'open'

@jnthn - Status changed from 'open' to 'resolved'