Don't let rustdoc source code urls look at bodies

[oli-obk]

It is too fragile (keeps ICEing) and will only ever work for a single cfg, but rustdoc looks at all cfgs at the same time

see also #122066 (comment) and #69426 (comment)

r? @GuillaumeGomez

[GuillaumeGomez]

That saddens me a lot but not much can be done I suppose... Can you add test which currently fails so that we can avoid bringing in new breaking changes in the future please?

[oli-obk]

we discussed this in DMs. #122066 (comment) will disable it for rustc, and there are current plans for major changes about it on the rustdoc side

[GuillaumeGomez]

For everyone to know: the plan is to remove all this from rustdoc and instead re-use the existing in JS so that such issues don't occur ever again (so no more compiler queries).

[rust-log-analyzer]

The job x86_64-gnu-tools failed! Check out the build log: (web) (plain)

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/checkout/tests/rustdoc-gui/source-anchor-scroll.goml source-anchor-scroll... FAILED
[ERROR] `tests/rustdoc-gui/source-anchor-scroll.goml` line 10: XPath "//a[text() = "barbar" and @href="#5-7"]" not found: for command `click: '//a[text() = "barbar" and @href="#5-7"]'`
FError: ()
Build completed unsuccessfully in 0:02:31
  local time: Thu Mar  7 10:02:29 UTC 2024
  network time: Thu, 07 Mar 2024 10:02:29 GMT