Its not a secret that when you hold shift and click the "Destroy Item" button in the survival part of the creative inventory, that it clears your entire inventory. However, when I do this it tells me not to try and access my crafting slots.
IGN: HHG
When: 5:04 pm CDT; 28 March, 2016
What it is: Chat message when clearing inventory
Server: Creative
Video:
IGN: HHG
When: 5:04 pm CDT; 28 March, 2016
What it is: Chat message when clearing inventory
Server: Creative
Video: