`./x.py test` fails due to broken links to `core/convert/enum.Infallible.html`

I tried running ./x.py test locally and got this error:

Building stage1 linkchecker (stage0 -> stage1, x86_64-unknown-linux-gnu)
    Finished `release` profile [optimized + debuginfo] target(s) in 0.22s
Testing stage1 Linkcheck (x86_64-unknown-linux-gnu)
reference/print.html:15697: broken link - `core/convert/enum.Infallible.html`
reference/print.html:58792: broken link - `core/convert/enum.Infallible.html`
reference/crates-and-source-files.html:633: broken link - `core/convert/enum.Infallible.html`
reference/types/never.html:563: broken link - `core/convert/enum.Infallible.html`
checked links in: 46.2s
number of HTML files scanned: 62405
number of HTML redirects found: 22249
number of links checked: 2983027
number of links ignored due to external: 186456
number of links ignored due to exceptions: 31
number of intra doc links ignored: 9
errors found: 4
NOTE: if you are adding or renaming a markdown file in a mdBook, don't forget to register the page in SUMMARY.md
found some broken links
Command `/usr/local/google/home/aliceryhl/rust/build/x86_64-unknown-linux-gnu/stage1-tools-bin/linkchecker /usr/local/google/home/aliceryhl/rust/build/x86_64-unknown-linux-gnu/doc` failed with exit code 1
Created at: src/bootstrap/src/core/build_steps/tool.rs:1627:23
Executed at: src/bootstrap/src/core/build_steps/test.rs:224:77

Command has failed. Rerun with -v to see more details.
Build completed unsuccessfully in 0:46:18

Run ./x.py test and inspect the broken-link references in reference/print.html, reference/crates-and-source-files.html, and reference/types/never.html. Use src/bootstrap/src/core/build_steps/tool.rs and test.rs to understand the linkchecker entry point; done means the four Infallible links resolve and ./x.py test completes successfully.