_ready_buffer: space has no grants for a user

[oleg-jukovec]

The queue_name_ready_buffer space:

queue/queue/abstract/driver/utubettl.lua

Lines 343 to 358 in 3bfd1e2

	-- Create a space for first ready tasks from each utube.
	space_ready_buffer = box.schema.create_space(space_ready_buffer_name, space_opts)
	space_ready_buffer:create_index('task_id', {
	type = 'tree',
	parts = {1, num_type()},
	unique = true,
	})
	space_ready_buffer:create_index('utube', {
	type = 'tree',
	parts = {2, str_type()},
	unique = true,
	})
	space_ready_buffer:create_index('pri', {
	type = 'tree',
	parts = {3, num_type(), 1, num_type()},
	})

does not have user grants like regular spaces:

queue/queue/abstract.lua

Line 349 in df24f17

tube_grant_space(user, self.name)