Saving Processing's Package Layers algorithm's output to default temporary output leaves no result

[kannes]

Describe the bug
If you do not select a file to write to for Processing's Package Layers algorithm, it will produce no result. The default output is a temporary file which makes no sense for this kind of functionality.

How to Reproduce

1. Load some layers
2. Open Package Layers algorithm
3. Select layers
4. Click Run
5. You get nothing

QGIS and OS versions

QGIS 3.8.0

[alexbruy]

Not reproducible on master and 3.8: output file created and contains selected layers.

[kannes]

I can confirm that and I wonder if I really looked properly back then.

Example output with a temporary output, which writes a GPKG to the temporary path:

QGIS version: 3.9.0-Master
QGIS code revision: 738ced6488
Qt version: 5.13.1
GDAL version: 3.0.1
GEOS version: 3.7.2-CAPI-1.11.2 b55d2125
PROJ version: Rel. 6.2.0, September 1st, 2019
Processing algorithm…
Algorithm 'Package layers' starting…
Input parameters:
{ 'LAYERS' : ['/tmp/ne_10m_coastline.shp','/tmp/ne_10m_geography_marine_polys.shp','/tmp/ne_10m_geography_regions_elevation_points.shp'], 'OUTPUT' : 'TEMPORARY_OUTPUT', 'OVERWRITE' : False, 'SAVE_STYLES' : True }

Packaging layer 1/3: ne_10m_coastline
Packaging layer 2/3: ne_10m_geography_marine_polys
Packaging layer 3/3: ne_10m_geography_regions_elevation_points
Execution completed in 0.34 seconds
Results:
{'OUTPUT': '/tmp/processing_f59b8b556834422a975f8dcb1ef3bd76/ea4dbe74a97e4b478da0883b89b79371/OUTPUT.gpkg',
'OUTPUT_LAYERS': ['/tmp/processing_f59b8b556834422a975f8dcb1ef3bd76/ea4dbe74a97e4b478da0883b89b79371/OUTPUT.gpkg|layername=ne_10m_coastline',
'/tmp/processing_f59b8b556834422a975f8dcb1ef3bd76/ea4dbe74a97e4b478da0883b89b79371/OUTPUT.gpkg|layername=ne_10m_geography_marine_polys',
'/tmp/processing_f59b8b556834422a975f8dcb1ef3bd76/ea4dbe74a97e4b478da0883b89b79371/OUTPUT.gpkg|layername=ne_10m_geography_regions_elevation_points']}

Loading resulting layers
Algorithm 'Package layers' finished