Rustdoc JSON produces dangling ID's when linking to foreign methods #106378
Description
#![feature(intra_doc_pointers)]
//! [`read`][pointer::read]
Errors with
---- [rustdoc-json] src/test/rustdoc-json/intra-doc-links/pointer_method.rs stdout ----
error: jsondoclint failed!
status: exit status: 1
command: "/home/nixon/dev/rust/rust/build/x86_64-unknown-linux-gnu/stage0-tools-bin/jsondoclint" "/home/nixon/dev/rust/rust/build/x86_64-unknown-linux-gnu/test/rustdoc-json/intra-doc-links/pointer_method/pointer_method.json"
stdout: none
--- stderr -------------------------------
2:2017:1833 not in index or paths, but refered to at '$.index["0:0:1571"].links["pointer::read"]'
Error: Errors validating json /home/nixon/dev/rust/rust/build/x86_64-unknown-linux-gnu/test/rustdoc-json/intra-doc-links/pointer_method/pointer_method.json
------------------------------------------
And produces
"0:0:1571": {
"crate_id": 0,
"docs": "[`read`][pointer::read]",
"id": "0:0:1571",
"inner": {"is_crate": true, "is_stripped": false, "items": []},
"kind": "module",
"links": {"pointer::read": "2:2017:1833"},
"name": "pointer_method"
}