rustdoc search is broken

[arifd]

sqlx was updated yesterday. and its search is now broken.

compare: https://docs.rs/sqlx/latest/sqlx/?search=types

with: https://docs.rs/sqlx/0.7.2/sqlx/index.html?search=types

[Urgau]

Firefox prints those errors:

Uncaught InternalError: too much recursion
    unifyFunctionTypeIsUnboxCandidate https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    unifyFunctionTypes https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    checkType https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    checkIfInList https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    unifyFunctionTypeIsUnboxCandidate https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    unifyFunctionTypes https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    checkType https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    checkIfInList https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    unifyFunctionTypeIsUnboxCandidate https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    unifyFunctionTypes https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1
    checkType https://docs.rs/-/rustdoc.static/search-f4028ef4dd0903c7.js:1

with rustdoc 1.76.0-nightly (1e9dda77b 2023-11-22)

@rustbot label -needs-triage +T-rustdoc +A-rustdoc-search +regression-untriaged
cc @notriddle