diff --git a/compile.c b/compile.c
index 1159a9d21e..a4328d03fa 100644
--- a/compile.c
+++ b/compile.c
@@ -9721,12 +9721,13 @@ static VALUE
 pinned_list_new(long size)
 {
     struct pinned_list * ptr;
+    VALUE obj_list =
+        TypedData_Make_Struct(0, struct pinned_list, &pinned_list_type, ptr);
 
-    ptr = xmalloc(sizeof(struct pinned_list));
-    ptr->size = size;
     ptr->buffer = xcalloc(size, sizeof(VALUE));
+    ptr->size = size;
 
-    return TypedData_Wrap_Struct(0, &pinned_list_type, ptr);
+    return obj_list;
 }
 
 static ibf_offset_t
diff --git a/lib/rubygems/installer.rb b/lib/rubygems/installer.rb
index cf676854dc..cce2967cfd 100644
--- a/lib/rubygems/installer.rb
+++ b/lib/rubygems/installer.rb
@@ -189,6 +189,7 @@ class Gem::Installer
     if options[:user_install]
       @gem_home = Gem.user_dir
       @bin_dir = Gem.bindir gem_home unless options[:bin_dir]
+      @plugins_dir = Gem.plugindir(gem_home)
       check_that_user_bin_dir_is_in_path
     end
   end