Drush devel generate errors and results in nodes generated without data

Trying to generate content on site running domain access with Drush results in PHP warnings, also results in empty nodes being generated.

$ drush generate-content 5
array_filter() expects parameter 1 to be array, null given domain.module:1489                 [warning]
array_filter() expects parameter 1 to be array, null given domain.module:1489                 [warning]
array_filter() expects parameter 1 to be array, null given domain.module:1489                 [warning]
array_filter() expects parameter 1 to be array, null given domain.module:1489                 [warning]
array_filter() expects parameter 1 to be array, null given domain.module:1489                 [warning]

When i tried Devel generate from UI, had no such problems.