Memory leak on Leptos 0.6.15 and actix-web 4.8

[bitemyapp]

leptos-query/query/src/use_query.rs

Line 211 in b459583

pub(crate) fn register_observer_handle_cleanup<K, V, Fu>(

Led to OOM kills, servers getting bounced. Was worse under libc malloc than jemalloc but it definitely still happens under jemalloc.

Tracked it down finally by very gently loading up a local instance of the server running in release mode + debug symbols w/ libc malloc under heaptrack with watch running curl at interval -n 1 in a few terminal tabs. Using drill made the server thrash and crash.

Seeing leaks that trace back to register_observer_handle_cleanup, ResourceData, get_state, etc. The common roots seem to be QueryState's .clone() and ResourceData's.

I'll be trying to figure out the least invasive way to disable leptos_query in the server so I can stop the bleeding.