From e42337b6089dcabcbb9313ff0f7a959c949391d5 Mon Sep 17 00:00:00 2001
From: flip1995 <hello@philkrones.com>
Date: Fri, 24 Apr 2020 18:22:18 +0200
Subject: [PATCH] Quick and dirty fix of the unused_braces lint

Adresses #70814
---
 src/librustc_lint/unused.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/librustc_lint/unused.rs b/src/librustc_lint/unused.rs
index a3748a3a9fed..ddd252cb290e 100644
--- a/src/librustc_lint/unused.rs
+++ b/src/librustc_lint/unused.rs
@@ -16,7 +16,7 @@ use rustc_middle::ty::{self, Ty};
 use rustc_session::lint::builtin::UNUSED_ATTRIBUTES;
 use rustc_span::symbol::Symbol;
 use rustc_span::symbol::{kw, sym};
-use rustc_span::{BytePos, Span};
+use rustc_span::{BytePos, Span, DUMMY_SP};
 
 use log::debug;
 
@@ -415,6 +415,12 @@ trait UnusedDelimLint {
         msg: &str,
         keep_space: (bool, bool),
     ) {
+        // FIXME(flip1995): Quick and dirty fix for #70814. This should be fixed in rustdoc
+        // properly.
+        if span == DUMMY_SP {
+            return;
+        }
+
         cx.struct_span_lint(self.lint(), span, |lint| {
             let span_msg = format!("unnecessary {} around {}", Self::DELIM_STR, msg);
             let mut err = lint.build(&span_msg);