From 19eab74014d78f800c2cef9aabb7ce3d8a0e8b4e Mon Sep 17 00:00:00 2001
From: Paolo Carlini <paolo.carlini@oracle.com>
Date: Sun, 28 Jan 2018 01:28:05 +0000
Subject: [PATCH] re PR c++/83924 (ICE: Error reporting routines re-entered
 with -Wduplicated-branches)

2018-01-27  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/83924
	* g++.dg/warn/Wduplicated-branches5.C: New.

From-SVN: r257131
---
 gcc/testsuite/ChangeLog                          |  5 +++++
 .../g++.dg/warn/Wduplicated-branches5.C          | 16 ++++++++++++++++
 2 files changed, 21 insertions(+)
 create mode 100644 gcc/testsuite/g++.dg/warn/Wduplicated-branches5.C

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 42ba2fd857b..9470667df30 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-01-27  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/83924
+	* g++.dg/warn/Wduplicated-branches5.C: New.
+
 2018-01-26  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	* gcc.target/powerpc/safe-indirect-jump-1.c: Build on all targets.
diff --git a/gcc/testsuite/g++.dg/warn/Wduplicated-branches5.C b/gcc/testsuite/g++.dg/warn/Wduplicated-branches5.C
new file mode 100644
index 00000000000..d23a3e7ed32
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/Wduplicated-branches5.C
@@ -0,0 +1,16 @@
+// PR c++/83924
+// { dg-do compile { target c++11 } }
+// { dg-options "-Wduplicated-branches" }
+
+class GenVectorS {};
+
+template<int N>
+using  VectorS = GenVectorS;
+
+template<int n, int m>
+void runB(const VectorS<(n > m ? n : m)>)
+{}
+
+void runA() {
+	runB<1, 1>(VectorS<1>{});
+}
-- 
2.30.2