minor bugfix

wwood · Mar 21, 2014 · f00f89c · f00f89c
1 parent 9cf4bc9
commit f00f89c
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/lib/bio-velvet/graph.rb b/lib/bio-velvet/graph.rb
@@ -571,6 +571,10 @@ class NodedRead
       def self.apply_grep_hack(graph, path_to_graph_file, interesting_read_ids, interesting_node_ids, grep_context)
         interesting_read_ids ||= []
         interesting_node_ids ||= []
+        if interesting_read_ids.empty? and interesting_node_ids.empty?
+          log.debug "Nothing to grep for in grep hack" if log.debug?
+          return
+        end
 
         Tempfile.open('grep_v_hack') do |tempfile|
           # Create a file to pass to grep -f