Open the source, too.

diff --git a/src/main/java/net/pterodactylus/sonitus/data/Pipeline.java b/src/main/java/net/pterodactylus/sonitus/data/Pipeline.java
index 5bbcd63..ae4924b 100644 (file)
--- a/src/main/java/net/pterodactylus/sonitus/data/Pipeline.java
+++ b/src/main/java/net/pterodactylus/sonitus/data/Pipeline.java
@@ -151,6 +151,7 @@ public class Pipeline implements Iterable<Filter> {
                }
                List<Filter> filters = Lists.newArrayList();
                filters.add(source);
+               source.open(Metadata.UNKNOWN);
                /* collect all source->sink pairs. */
                while (!filters.isEmpty()) {
                        Filter filter = filters.remove(0);