bugfix...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

Viewer/features/core.js

@@ -2703,6 +2703,9 @@ function(title, func){
 // thus making the final behaviour unpredictable.
 //
 //
+// NOTE: promise results are .flat()-tened, thus if it is needed to return 
+// 		a list of arrays then one must wrap the handler return value in an
+// 		array...
 // NOTE: sync-mode actions do not externally log anything, basic progress 
 // 		logging is handled by the queue/task which is not created in sync
 // 		mode.

Viewer/features/examples.js

@@ -375,6 +375,9 @@ var ExampleActions = actions.Actions({
 						console.log('\t\tSKIP', item)
 						return runner.SKIP }
 
+					// NOTE: the handler's return value list is .flat()-end
+					// 		so if one needs to return a array the it must be
+					// 		wrapped in an array...
 					return item+1 }),
 			// handle inputs (async/queue)... 
 			function(item, ...args){

Viewer/features/sharp.js

@@ -288,7 +288,7 @@ var SharpActions = actions.Actions({
 					if(!image || !['image', null, undefined]
 							.includes(image.type)){
 						return runner.SKIP }
-					return [
+					return [[
 						// source...
 						this.getImagePath(gid),
 						// target...
@@ -307,7 +307,7 @@ var SharpActions = actions.Actions({
 							flipped: image.flipped,
 							// crop...
 						},
-					] }),
+					]] }),
 			// do the actual resizing (global queue)...
 			function([source, to, image={}], size, _, options={}){
 				// handle skipped items -- source, to and image are undefined...
@@ -625,7 +625,7 @@ var SharpActions = actions.Actions({
 					var base = base_path 
 						|| img.base_path 
 						|| this.location.path
-					return [
+					return [[
 						gid,
 						// source...
 						this.getImagePath(gid), 
@@ -643,7 +643,7 @@ var SharpActions = actions.Actions({
 										pathlib.join(base, name)),
 								] }),
 						index_dir,
-					]}),
+					]]}),
 			// generate the previews...
 			// NOTE: this is competely isolated...
 			// XXX args/logger is wrong here...