Minor allow null output params and values [ci fast]

Signed-off-by: Paolo Di Tommaso <[email protected]>

Author: pditommaso

modules/nf-lineage/src/main/nextflow/lineage/LinObserver.groovy

@@ -203,11 +203,11 @@ class LinObserver implements TraceObserver {
         return key
     }
 
-    private List<Parameter> getNormalizedTaskOutputs( TaskRun task, PathNormalizer normalizer){
+    private List<Parameter> getNormalizedTaskOutputs(TaskRun task, PathNormalizer normalizer){
         final outputs = task.getOutputs()
         final outputParams = new LinkedList<Parameter>()
-        outputs.forEach { OutParam key, Object value ->
-            manageTaskOutputParameter(key, outputParams, value, task, normalizer)
+        for( Map.Entry<OutParam,Object> entry : outputs ) {
+            manageTaskOutputParameter(entry.key, outputParams, entry.value, task, normalizer)
         }
         return outputParams
     }
@@ -231,7 +231,8 @@ class LinObserver implements TraceObserver {
 
     private Object manageFileOutParam(Object value, TaskRun task) {
         if (value == null) {
-            throw new IllegalArgumentException("Unexpected output null for task '${task.name}'")
+            log.debug "Unexpected lineage File output value null"
+            return null
         }
         if (value instanceof Path) {
             return asUriString(storeTaskOutput(task, (Path) value))
@@ -407,9 +408,11 @@ class LinObserver implements TraceObserver {
             return Collection.simpleName
         if( param instanceof Map)
             return Map.simpleName
-        return param!=null
-            ? param.class.simpleName
-            : null
+        if( param==null ) {
+            log.debug "Unexpected lineage param type null"
+            return null
+        }
+        return param.class.simpleName
     }
 
     private Object convertPathsToLidReferences(Object value){