From 05f0592b34cb943e7c96b8767d716431a3d9eaef Mon Sep 17 00:00:00 2001
From: Eli Fidler <efidler@topologyinc.com>
Date: Tue, 31 May 2016 12:45:52 -0400
Subject: [PATCH] avoid shift out-of-range error

UBSAN gave in Regex.Unicode test:
include/rapidjson/encodings.h:157:28: runtime error: shift exponent 32 is too large for 32-bit type 'int'
---
 include/rapidjson/encodings.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/rapidjson/encodings.h b/include/rapidjson/encodings.h
index edfc990..baa7c2b 100644
--- a/include/rapidjson/encodings.h
+++ b/include/rapidjson/encodings.h
@@ -154,7 +154,11 @@ struct UTF8 {
         }
 
         unsigned char type = GetRange(static_cast<unsigned char>(c));
-        *codepoint = (0xFF >> type) & static_cast<unsigned char>(c);
+        if (type >= 32) {
+            *codepoint = 0;
+        } else {
+            *codepoint = (0xFF >> type) & static_cast<unsigned char>(c);
+        }
         bool result = true;
         switch (type) {
         case 2: TAIL(); return result;