1 files changed, 20 insertions, 1 deletions
diff --git a/lib/rubygems/dependency_resolver/installer_set.rb b/lib/rubygems/dependency_resolver/installer_set.rb
index c39f77a005..e19fcd76e4 100644
--- a/lib/rubygems/dependency_resolver/installer_set.rb
+++ b/lib/rubygems/dependency_resolver/installer_set.rb
@@ -87,7 +87,11 @@ class Gem::DependencyResolver::InstallerSet
   end
 
   def inspect # :nodoc:
-    '#<%s domain: %s specs: %p>' % [ self.class, @domain, @specs.keys ]
+    always_install = @always_install.map { |s| s.full_name }
+
+    '#<%s domain: %s specs: %p always install: %p>' % [
+      self.class, @domain, @specs.keys, always_install,
+    ]
   end
 
   ##
@@ -131,5 +135,20 @@ class Gem::DependencyResolver::InstallerSet
   def prefetch(reqs)
   end
 
+  def pretty_print q # :nodoc:
+    q.group 2, '[InstallerSet', ']' do
+      q.breakable
+      q.text "domain: #{@domain}"
+
+      q.breakable
+      q.text 'specs: '
+      q.pp @specs.keys
+
+      q.breakable
+      q.text 'always install: '
+      q.pp @always_install
+    end
+  end
+
 end