From f5ca02c334b2eaa6817c15d6e2c88ab98d2a2054 Mon Sep 17 00:00:00 2001
From: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Date: Tue, 1 Feb 2022 20:30:32 +0800
Subject: [PATCH] proc_macro: Add a workaround for rustdoc

---
 Cargo.lock                    | 1 +
 library/proc_macro/Cargo.toml | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index e3a9eb34936..fbc9ca7051f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2894,6 +2894,7 @@ dependencies = [
 name = "proc_macro"
 version = "0.0.0"
 dependencies = [
+ "core",
  "std",
 ]
 
diff --git a/library/proc_macro/Cargo.toml b/library/proc_macro/Cargo.toml
index db5e2e4e245..e54a50aa15c 100644
--- a/library/proc_macro/Cargo.toml
+++ b/library/proc_macro/Cargo.toml
@@ -5,3 +5,7 @@ edition = "2021"
 
 [dependencies]
 std = { path = "../std" }
+# Workaround: when documenting this crate rustdoc will try to load crate named
+# `core` when resolving doc links. Without this line a different `core` will be
+# loaded from sysroot causing duplicate lang items and other similar errors.
+core = { path = "../core" }