[Git] Avoid loading full gemspecs in -rbundler/setup when stubs are available

1 files changed, 10 insertions, 1 deletions

diff --git a/lib/bundler/stub_specification.rb b/lib/bundler/stub_specification.rb
index 9e43f06364..2e8938e12d 100644
--- a/lib/bundler/stub_specification.rb
+++ b/lib/bundler/stub_specification.rb
@@ -36,8 +36,17 @@ module Bundler
       stub.default_gem
     end
 
+    # This is what we do in bundler/rubygems_ext
     def full_gem_path
-      stub.full_gem_path
+      # this cannot check source.is_a?(Bundler::Plugin::API::Source)
+      # because that _could_ trip the autoload, and if there are unresolved
+      # gems at that time, this method could be called inside another require,
+      # thus raising with that constant being undefined. Better to check a method
+      if source.respond_to?(:path) || (source.respond_to?(:bundler_plugin_api_source?) && source.bundler_plugin_api_source?)
+        Pathname.new(loaded_from).dirname.expand_path(source.root).to_s.untaint
+      else
+        rg_full_gem_path
+      end
     end
 
     def full_require_paths