gistfile1.txt

diff --git a/library/rubygems/basic_specification.rb b/library/rubygems/basic_specification.rb
index 470a6eb..2ad6e7a 100644
--- a/library/rubygems/basic_specification.rb
+++ b/library/rubygems/basic_specification.rb
@@ -53,8 +53,6 @@ class Gem::BasicSpecification
   # Return true if this spec can require +file+.

   def contains_requirable_file? file
-    build_extensions
-
     suffixes = Gem.suffixes

     full_require_paths.any? do |dir|
diff --git a/library/rubygems/request_set.rb b/library/rubygems/request_set.rb
index fb54e34..260077a 100644
--- a/library/rubygems/request_set.rb
+++ b/library/rubygems/request_set.rb
@@ -125,8 +125,6 @@ class Gem::RequestSet

     sorted_requests.each do |req|
       if req.installed? then
-        req.spec.spec.build_extensions
-
         if @always_install.none? { |spec| spec == req.spec.spec } then
           yield req, nil if block_given?
           next
diff --git a/library/rubygems/specification.rb b/library/rubygems/specification.rb
index f4e609a..fc1ccb1 100644
--- a/library/rubygems/specification.rb
+++ b/library/rubygems/specification.rb
@@ -1414,6 +1414,7 @@ class Gem::Specification < Gem::BasicSpecification
   # the gem.build_complete file is missing.

   def build_extensions # :nodoc:
+    return
     return if default_gem?
     return if extensions.empty?
     return if installed_by_version < Gem::Version.new('2.2.0.preview.2')
diff --git a/library/rubygems/stub_specification.rb b/library/rubygems/stub_specification.rb
index 221dc1d..452735c 100644
--- a/library/rubygems/stub_specification.rb
+++ b/library/rubygems/stub_specification.rb
@@ -54,6 +54,7 @@ class Gem::StubSpecification < Gem::BasicSpecification
   end

   def build_extensions # :nodoc:
+    return
     return if default_gem?
     return if extensions.empty?