warning: `with#anchor#error` contains multiple anchors
  --> $DIR/double-anchor.rs:5:18
   |
LL | /// docs [label][with#anchor#error]
   |                  ^^^^^^^^^^^------
   |                             |
   |                             invalid anchor
   |
   = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default

warning: 1 warning emitted