[rubygems/rubygems] Detect circular dependency errors

https://github.com/rubygems/rubygems/commit/a8348d271d

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/bundler/vendor/pub_grub/lib/pub_grub/incompatibility.rb b/lib/bundler/vendor/pub_grub/lib/pub_grub/incompatibility.rb
index 51e1fc3cdd..dab58ecdf7 100644
--- a/lib/bundler/vendor/pub_grub/lib/pub_grub/incompatibility.rb
+++ b/lib/bundler/vendor/pub_grub/lib/pub_grub/incompatibility.rb
@@ -8,6 +8,9 @@ module Bundler::PubGrub
     InvalidDependency = Struct.new(:package, :constraint) do
     end
 
+    CircularDependency = Struct.new(:package, :constraint) do
+    end
+
     NoVersions = Struct.new(:constraint) do
     end
 
@@ -63,6 +66,8 @@ module Bundler::PubGrub
         "#{terms[0].to_s(allow_every: true)} depends on #{terms[1].invert}"
       when Bundler::PubGrub::Incompatibility::InvalidDependency
         "#{terms[0].to_s(allow_every: true)} depends on unknown package #{cause.package}"
+      when Bundler::PubGrub::Incompatibility::CircularDependency
+        "#{terms[0].to_s(allow_every: true)} depends on itself"
       when Bundler::PubGrub::Incompatibility::NoVersions
         "no versions satisfy #{cause.constraint}"
       when Bundler::PubGrub::Incompatibility::ConflictCause