From 41318e9a267024fb36162382e26944d235aa71cd Mon Sep 17 00:00:00 2001
From: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Date: Wed, 8 Jan 2020 15:07:26 +0300
Subject: [PATCH] compiletest: Do not deduplicate diagnostics in UI tests

---
 src/tools/compiletest/src/runtest.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 226a12c6734b..1912c9ef5bae 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -1864,12 +1864,14 @@ impl<'test> TestCx<'test> {
                     rustc.args(&["--error-format", "json"]);
                 }
                 rustc.arg("-Zui-testing");
+                rustc.arg("-Zdeduplicate-diagnostics=no");
             }
             Ui => {
                 if !self.props.compile_flags.iter().any(|s| s.starts_with("--error-format")) {
                     rustc.args(&["--error-format", "json"]);
                 }
                 rustc.arg("-Zui-testing");
+                rustc.arg("-Zdeduplicate-diagnostics=no");
             }
             MirOpt => {
                 rustc.args(&[