Wrong disambiguation of enum values vs. subroutines

[moritz]

11:47 < moritz> perl6: enum A <b c>; sub b() { 'sub' }; say b(); say b
11:47 <+p6eval> ..niecza v13-291-gca7eb73: OUTPUT«Unhandled exception: No value
            for parameter $key in CommonEnum.postcircumfix:<( )>␤  at
            /home/p6eval/niecza/lib/CORE.setting line 0
            (CommonEnum.postcircumfix:<( )> @ 1) ␤  at /tmp/f4au61f2Nq line 1
            (mainline @ 2) ␤  at /home/p6eval/niecza/lib/CORE.setting…

Should call the function &b, not invoke the enum value, according to http://perlcabal.org/syn/S12.html#Miscellaneous_Rules