1 files changed, 6 insertions, 0 deletions
diff --git a/lib/output/callHook.js b/lib/output/callHook.js
index f6119fd..8d34bdc 100644
--- a/lib/output/callHook.js
+++ b/lib/output/callHook.js
@@ -21,12 +21,18 @@ function callHook(name, getArgument, handleResult, output) {
     getArgument = getArgument || defaultGetArgument;
     handleResult = handleResult || defaultHandleResult;
 
+    var logger = output.getLogger();
     var plugins = output.getPlugins();
 
+    logger.debug.ln('calling hook "' + name + '"');
+
     return Promise(getArgument(output))
     .then(function(arg) {
         return Promise.reduce(plugins, function(prev, plugin) {
             var hook = plugin.getHook(name);
+            if (!hook) {
+                return prev;
+            }
 
             return hook(prev);
         }, arg);