perl-Moose has a buildreq of perl(Data::Visitor), which is used in
the test suite if available. However, Data::Visitor itself requires
Moose, so this creates a circular build dependency, which will be a
problem when we come to build everything for perl 5.16.
It also has a buildreq and req of perl(Devel::PartialDump) >= 0.14, which gives better runtime diagnostics of some errors. However, Devel::PartialDump also requires Moose and hence is a circular dependency. The functionality provided by Devel::PartialDump is not tested in the test suite so it can be dropped as a buildreq with no effects (in fact this had been done in the past in build 2.0002-2). It's OK to leave it as a req as Moose can be built first.
Suggested fixes are to not buildrequire Data::Visitor when bootstrapping and to drop Devel::PartialDump as a buildreq entirely:
diff --git a/perl-Moose.spec b/perl-Moose.spec
index c9d49d4..9d30544 100644
@@ -19,7 +19,9 @@ BuildRequires: perl(ExtUtils::MakeMaker) >= 6.30
BuildRequires: perl(DBM::Deep) >= 1.0003
@@ -69,14 +71,12 @@ BuildRequires: perl(Sub::Exporter) >= 0.980
BuildRequires: perl(Sub::Name) >= 0.05
BuildRequires: perl(Try::Tiny) >= 0.02
-BuildRequires: perl(Devel::PartialDump) >= 0.14
Requires: perl(Data::OptList) >= 0.107
Requires: perl(Dist::CheckConflicts) >= 0.02
+# recommended (note: this uses Moose itself)
Requires: perl(Devel::PartialDump) >= 0.14
# hidden from PAUSE
Patch applied and built in rawhide.