From 1bb56544ae15be58fabe3af820d9a7ce5028da3e Mon Sep 17 00:00:00 2001
From: Orivej Desh <orivej@gmx.fr>
Date: Tue, 8 Oct 2019 09:10:18 +0000
Subject: [PATCH] Fix undefined in printf-test

Fixes "signed integer overflow" in PrintfTest.Length

This occurs in `TestLength<long long>("ll")`, since its minimum value minus one
does not fit in long long.
---
 test/printf-test.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test/printf-test.cc b/test/printf-test.cc
index cd9950d1..d8fbc964 100644
--- a/test/printf-test.cc
+++ b/test/printf-test.cc
@@ -337,7 +337,9 @@ template <typename T> void TestLength(const char* length_spec) {
   TestLength<T>(length_spec, -42);
   TestLength<T>(length_spec, min);
   TestLength<T>(length_spec, max);
-  TestLength<T>(length_spec, static_cast<long long>(min) - 1);
+  long long long_long_min = std::numeric_limits<long long>::min();
+  if (static_cast<long long>(min) > long_long_min)
+    TestLength<T>(length_spec, static_cast<long long>(min) - 1);
   unsigned long long long_long_max = max_value<long long>();
   if (static_cast<unsigned long long>(max) < long_long_max)
     TestLength<T>(length_spec, static_cast<long long>(max) + 1);