From 1835cbeb6574997ec5188cb22b9538c61976d2b4 Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Thu, 2 May 2019 20:56:07 +0300
Subject: don't amplify errors in format! with bad literals

---
 src/libsyntax/ext/base.rs | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/libsyntax/ext')

diff --git a/src/libsyntax/ext/base.rs b/src/libsyntax/ext/base.rs
index 452cc2f2c65..cc19acb61ad 100644
--- a/src/libsyntax/ext/base.rs
+++ b/src/libsyntax/ext/base.rs
@@ -998,6 +998,7 @@ pub fn expr_to_spanned_string<'a>(
     Err(match expr.node {
         ast::ExprKind::Lit(ref l) => match l.node {
             ast::LitKind::Str(s, style) => return Ok(respan(expr.span, (s, style))),
+            ast::LitKind::Err(_) => None,
             _ => Some(cx.struct_span_err(l.span, err_msg))
         },
         ast::ExprKind::Err => None,
-- 
cgit 1.4.1-3-g733a5