Merge pull request #4286 from kares/regression-ensure-gem-sub-dir_3.2

Swallow any system call error in `ensure_gem_subdirs` to support jruby embed paths

Author: deivid-rodriguez

lib/rubygems.rb

@@ -469,7 +469,7 @@ def self.ensure_subdirectories(dir, mode, subdirs) # :nodoc:
       next if File.exist? subdir
       begin
         FileUtils.mkdir_p subdir, **options
-      rescue Errno::EACCES
+      rescue SystemCallError
       end
     end
   ensure

test/rubygems/test_gem.rb

@@ -692,6 +692,11 @@ def test_self_ensure_gem_directories_write_protected_parents
     ensure
       FileUtils.chmod 0600, parent
     end
+
+    def test_self_ensure_gem_directories_non_existent_paths
+      Gem.ensure_gem_subdirectories '/proc/0123456789/bogus' # should not raise
+      Gem.ensure_gem_subdirectories 'classpath:/bogus/x' # JRuby embed scenario
+    end
   end
 
   def test_self_extension_dir_shared