Ever since 1.10 pre 1 I can't get this to work anymore. And I do have a pack.mcmeta inside resources.zip. I did in 1.9 too. And pack_format is set to 2 (inside that file).
If something changed in the pre 1 please let me know. I can't find any information about it anywhere. If not, then this is a bug.
Confirmed in pre-release 3
I tested it, and it's indeed fixed in the pre-release 2. Awesome!
Confirmed.
My included "resources" resource pack in my map worked for all previous snapshots, but doesn't work in 16w07a. Neither sound or textures are showing.
How did I not find that? I did search for it. OK, sorry...
It works when selecting a resource pack manually (located in ./minecraft/resourcepacks).
It says "Server resourcepack is invalid, ignoring it"