time_or_datetime.rb in tzinfo-0.3.61

- old
+ new

@@ -176,10 +176,18 @@
     # Compares this TimeOrDateTime with another Time, DateTime, integer
     # timestamp or TimeOrDateTime. Returns -1, 0 or +1 depending whether the 
     # receiver is less than, equal to, or greater than timeOrDateTime.
     #
     # Milliseconds and smaller units are ignored in the comparison.
+    #
+    # Returns nil if the passed in timeOrDateTime is not comparable with
+    # TimeOrDateTime instances.
     def <=>(timeOrDateTime)
+      return nil unless timeOrDateTime.is_a?(TimeOrDateTime) ||
+                        timeOrDateTime.is_a?(Time) ||
+                        timeOrDateTime.is_a?(DateTime) ||
+                        timeOrDateTime.respond_to?(:to_i)
+
       if timeOrDateTime.is_a?(TimeOrDateTime)            
         orig = timeOrDateTime.to_orig
         
         if @orig.is_a?(DateTime) || orig.is_a?(DateTime)
           # If either is a DateTime, assume it is there for a reason 