From @salortiz

use NativeCall; class MV is repr('CStruct') { has uint64 $.start; method s { if $!start {} } } # Fails

use NativeCall; class MV is repr('CStruct') { has uint64 $.start; method s { if +$!start {} } } # This works :/

From IRC​:

<sortiz> And the error message is totally uninformative!
<Skarsnik> duh
<Skarsnik> I don't even get why it does not work x)
<sortiz> Toke me hours to find the point of the error!
<jnthn> Odd, that's a compile-time failure even
<jnthn> sortiz​: Yeah, it's a crash during code-gen, bizzarely

From @jnthn

On Mon Feb 15 15​:31​:50 2016, sortiz wrote​:

use NativeCall; class MV is repr('CStruct') { has uint64 $.start;
method s { if $!start {} } } # Fails

use NativeCall; class MV is repr('CStruct') { has uint64 $.start;
method s { if +$!start {} } } # This works :/

From IRC​:

<sortiz> And the error message is totally uninformative!
<Skarsnik> duh
<Skarsnik> I don't even get why it does not work x)
<sortiz> Toke me hours to find the point of the error!
<jnthn> Odd, that's a compile-time failure even
<jnthn> sortiz​: Yeah, it's a crash during code-gen, bizzarely

Fixed the code-gen crash, and added tests in S12-attributes/native.t.

/jnthn

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

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