rustdoc: Deliberately load extern crates before processing docs

In order that we can successfully later resolve paths in crates
which weren't loaded as a result of merely parsing the crate
we're documenting, we force the resolution of the path to each
crate before cloning the resolver to use later.  Closes #66159

Signed-off-by: Daniel Silverstone <dsilvers@digital-scurf.org>

2 files changed, 12 insertions, 0 deletions

diff --git a/src/test/rustdoc/auxiliary/issue-66159-1.rs b/src/test/rustdoc/auxiliary/issue-66159-1.rs
new file mode 100644
index 00000000000..2f3d069bd51
--- /dev/null
+++ b/src/test/rustdoc/auxiliary/issue-66159-1.rs
@@ -0,0 +1,2 @@
+/// This will be referred to by the test docstring
+pub struct Something;
diff --git a/src/test/rustdoc/issue-66159.rs b/src/test/rustdoc/issue-66159.rs
new file mode 100644
index 00000000000..88eca733870
--- /dev/null
+++ b/src/test/rustdoc/issue-66159.rs
@@ -0,0 +1,10 @@
+// aux-build:issue-66159-1.rs
+// extern-private:issue_66159_1
+
+// The issue was an ICE which meant that we never actually generated the docs
+// so if we have generated the docs, we're okay.
+// Since we don't generate the docs for the auxilliary files, we can't actually
+// verify that the struct is linked correctly.
+
+// @has issue_66159/index.html
+//! [issue_66159_1::Something]