Can't expand/contract Rustdoc's [-] symbol if "cookies" disabled

[thanatos]

The output from rustdoc, at the top of the page for a struct or a const, etc., includes a line like,

Struct crate::MyStruct [-][src]

Clicking the [-] on a browser w/ restrictive cookie settings (which typically includes localStorage) results in an error similar to the following:

storage.js:11 Uncaught DOMException: Failed to read the 'localStorage' property from 'Window': Access is denied for this document.
at updateLocalStorage (file:///home/[...]/target/doc/storage.js:11:343)
at HTMLAnchorElement.toggleAllDocs (file:///home/[...]/target/doc/main.js:13:997)

Additionally, the section fails to expand or contract, as the exception isn't handled.

rustdoc is attempting to store the collapse/expand state, s.t. later visits to the page presumably maintain that state for the user's convenience.

I browse the web with an admittedly somewhat atypical setup: I whitelist cookies. localStorage, in most browsers, counts, since it is a similar mechanism of persistence. I think Rust's use of localStorage here is fine, but I would request that, if localStorage is forbidden by the user agent, that the documentation gracefully "degrade" to just expanding or contracting the requested item, but not persist it. As it is, the JS crashes while storing the state, and appears to never make it to actually expanding/contracting the item.