2 files changed, 56 insertions, 26 deletions
diff --git a/activesupport/lib/active_support/core_ext/time/marshal.rb b/activesupport/lib/active_support/core_ext/time/marshal.rb
new file mode 100644
index 0000000000..1a4d918ce7
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/time/marshal.rb
@@ -0,0 +1,56 @@
+# Pre-1.9 versions of Ruby have a bug with marshaling Time instances, where utc instances are
+# unmarshalled in the local zone, instead of utc. We're layering behavior on the _dump and _load
+# methods so that utc instances can be flagged on dump, and coerced back to utc on load.
+if !Marshal.load(Marshal.dump(Time.now.utc)).utc?
+  class Time
+    class << self
+      alias_method :_load_without_utc_flag, :_load
+      def _load(marshaled_time)
+        time = _load_without_utc_flag(marshaled_time)
+        time.instance_eval do
+          if defined?(@marshal_with_utc_coercion)
+            val = remove_instance_variable("@marshal_with_utc_coercion")
+          end
+          val ? utc : self
+        end
+      end
+    end
+
+    alias_method :_dump_without_utc_flag, :_dump
+    def _dump(*args)
+      obj = dup
+      obj.instance_variable_set('@marshal_with_utc_coercion', utc?)
+      obj._dump_without_utc_flag(*args)
+    end
+  end
+end
+
+# Ruby 1.9.2 adds utc_offset and zone to Time, but marshaling only
+# preserves utc_offset. Preserve zone also, even though it may not
+# work in some edge cases.
+if Time.local(2010).zone != Marshal.load(Marshal.dump(Time.local(2010))).zone
+  class Time
+    class << self
+      alias_method :_load_without_zone, :_load
+      def _load(marshaled_time)
+        time = _load_without_zone(marshaled_time)
+        time.instance_eval do
+          if zone = defined?(@_zone) && remove_instance_variable('@_zone')
+            ary = to_a
+            ary[-1] = zone
+            utc? ? Time.utc(*ary) : Time.local(*ary)
+          else
+            self
+          end
+        end
+      end
+    end
+
+    alias_method :_dump_without_zone, :_dump
+    def _dump(*args)
+      obj = dup
+      obj.instance_variable_set('@_zone', zone)
+      obj._dump_without_zone(*args)
+    end
+  end
+end
diff --git a/activesupport/lib/active_support/core_ext/time/marshal_with_utc_flag.rb b/activesupport/lib/active_support/core_ext/time/marshal_with_utc_flag.rb
deleted file mode 100644
index 8d46d80251..0000000000
--- a/activesupport/lib/active_support/core_ext/time/marshal_with_utc_flag.rb
+++ /dev/null
@@ -1,26 +0,0 @@
-# Pre-1.9 versions of Ruby have a bug with marshaling Time instances, where utc instances are
-# unmarshalled in the local zone, instead of utc. We're layering behavior on the _dump and _load
-# methods so that utc instances can be flagged on dump, and coerced back to utc on load.
-if RUBY_VERSION < '1.9'
-  class Time
-    class << self
-      alias_method :_original_load, :_load
-      def _load(marshaled_time)
-        time = _original_load(marshaled_time)
-        time.instance_eval do
-          if defined?(@marshal_with_utc_coercion)
-            val = remove_instance_variable("@marshal_with_utc_coercion")
-          end
-          val ? utc : self
-        end
-      end
-    end
-
-    alias_method :_original_dump, :_dump
-    def _dump(*args)
-      obj = dup
-      obj.instance_variable_set('@marshal_with_utc_coercion', utc?)
-      obj._original_dump(*args)
-    end
-  end
-end