Fix broken handling of primitive items

- Fix broken handling of primitive associated items
- Remove fragment hack

  Fixes 83083

- more logging
- Update CrateNum hacks

  The CrateNum has no relation to where in the dependency tree the crate
  is, only when it's loaded. Explicitly special-case core instead of
  assuming it will be the first DefId.

- Update and add tests
- Cache calculation of primitive locations

  This could possibly be avoided by passing a Cache into
  collect_intra_doc_links; but that's a much larger change, and doesn't
  seem valuable other than for this.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/test/rustdoc/primitive/no_std.rs b/src/test/rustdoc/primitive/no_std.rs
index 8d05a8e6e01..52806bd94f9 100644
--- a/src/test/rustdoc/primitive/no_std.rs
+++ b/src/test/rustdoc/primitive/no_std.rs
@@ -1,5 +1,6 @@
 #![no_std]
 
 // @has no_std/fn.foo.html '//a/[@href="{{channel}}/core/primitive.u8.html"]' 'u8'
-// Link to [u8]
+// @has no_std/fn.foo.html '//a/[@href="{{channel}}/core/primitive.u8.html"]' 'primitive link'
+/// Link to [primitive link][u8]
 pub fn foo() -> u8 {}