Implicit fetch of 'writable' attribute

The writable attribute may not already be present when attempting to
modify parameters included in the inform message. For other parameters
the writable attrbiute is guarenteed to have already been fetched
during discovery.

lib/session.ts

@@ -910,10 +910,15 @@ function runDeclarations(
         if (!unpacked)
           unpacked = device.unpack(sessionContext.deviceData, path);
 
-        for (const u of unpacked)
+        for (const u of unpacked) {
           mergeAttributeValues(u, declaration.attrSet, declaration.defer);
+          // Ensure writable attr is available
+          mergeAttributeTimestamps(u, { writable: 1 });
+        }
       } else {
         mergeAttributeValues(path, declaration.attrSet, declaration.defer);
+        // Ensure writable attr is available
+        mergeAttributeTimestamps(path, { writable: 1 });
       }
     }
 
@@ -937,14 +942,15 @@ function runDeclarations(
         keys = {};
       }
 
-      if (
+      if (!parent.wildcard && !parent.alias) {
-        ((path.wildcard | path.alias) & ((1 << (path.length - 1)) - 1)) ===
-        0
-      ) {
         parent = sessionContext.deviceData.paths.add(parent);
         if (!unpacked)
           unpacked = device.unpack(sessionContext.deviceData, path);
 
+        // Ensure writable attr is available
+        mergeAttributeTimestamps(parent, { writable: 1 });
+        for (const u of unpacked) mergeAttributeTimestamps(u, { writable: 1 });
+
         processInstances(
           sessionContext,
           parent,
@@ -960,13 +966,19 @@ function runDeclarations(
           parent
         );
         for (const par of parentsUnpacked) {
+          const up = device.unpack(
+            sessionContext.deviceData,
+            par.concat(path.slice(-1))
+          );
+
+          // Ensure writable attr is available
+          mergeAttributeTimestamps(par, { writable: 1 });
+          for (const u of up) mergeAttributeTimestamps(u, { writable: 1 });
+
           processInstances(
             sessionContext,
             par,
-            device.unpack(
+            up,
-              sessionContext.deviceData,
-              par.concat(path.slice(-1))
-            ),
             keys,
             minInstances,
             maxInstances,