===SORRY!=== Cannot assign to an immutable value (`perl6 -Ilib --ll-exception bin/zef --/test --depsonly install Inline::Perl5`) (rakudo 7250543)

Foo.pm6

class Foo is Bar {
    method hash {
        my %hash = callsame.append({ :$.api, :@!build-depends, :@!test-depends, :@!resources });
        %hash<license>  = $.license;
        %hash<support>  = %.support;

        # Problem starts here
        %hash<identity> = $.identity;
        # https://github.com/ugexe/zef/blob/master/lib/Zef/Distribution.pm6#L80
        # -> https://github.com/ugexe/zef/blob/master/lib/Zef/Distribution/DependencySpecification.pm6#L10
        #   -> https://github.com/ugexe/zef/blob/master/lib/Zef/Identity.pm6#L124
        #     -> https://github.com/ugexe/zef/blob/master/lib/Zef/Identity.pm6#L7
        #       -> https://github.com/ugexe/zef/blob/master/lib/Zef/Identity.pm6#L64
        #       -> https://github.com/ugexe/zef/blob/master/lib/Zef/Identity.pm6#L96

        %hash<id>       = $.id;
        %hash<Str>      = $.Str();

        %hash;
    }
}

# Started with: https://github.com/rakudo/rakudo/commit/725054360efa8e703367be8dc5d792769b19caed
# Larger context: https://github.com/ugexe/zef/blob/master/lib/Zef/Distribution.pm6#L73