Enabling book module breaks tokens, at least for ctools context

Reopening. I'm certain there is a problem here.

See the attached screenshots.

oldcode.png shows what I see in a panels view edit using the 6.x-1.15 code, newcode.png shows what I see with my patch applied.

My patch may be a sub-optimal solution, but there is certainly a problem here. As you can see in the screenshots, the list of available tokens is destroyed when book module is enabled.

The next question is, is this a panels/context issue or a tokens issue?

I've debugged through token_get_list, and dumping $return, shows that's where the issue first occurs. Ctools/context is simply using what it's given by token_get_list, and when book_token_list is used, token_get_list is returning almost no values.

To repeat the issue:

1. Install panels, views, ctools etc, tokens.
2. Create a view with an argument. Any view.
3. Create a panel node and add the view to the panel.
4. In panel content tab, click settings on the view pane. You will see all the tokens available.
5. Enable book module.
6. In panel content tab, click settings on the view pane. --> You see only a handful of tokens.

If panels was only requesting "node", then turning book module on/off should have no effect.

However, when book module is turned on, all the "node" tokens disappear.

Thinking out loud here.

This implies either panels is requesting "all", and can't handle the case where get_token_list returns more than a single category,

or,

there is some issue with the get_token_list function not working well when all is requested and multiple categories of tokens is returned.

I'll do some more debugging on this and see *exactly* what is happening then report back.