Issue #38

glejeune · Feb 6, 2012 · 4b68bd7 · 4b68bd7
1 parent 852ee11
commit 4b68bd7
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/lib/graphviz/attrs.rb b/lib/graphviz/attrs.rb
@@ -56,6 +56,11 @@ def []=( key, value )
             raise ArgumentError, "#{@name} attribute '#{key.to_s}' invalid"
          end
 
+         if value.nil?
+            warn "Value for attribute `#{key}` can't be null"
+            return
+         end
+
          begin
             value = GraphViz::Types.const_get(@attributes[key.to_s]).new( value )
          rescue => e