commit 953adb16ff2f982d54dd812b51df5fdb392732f8
author Thomas Van Lenten <thomasvl@google.com> Wed Jan 31 11:59:57 2018 -0500
committer Thomas Van Lenten <thomasvl@google.com> Wed Jan 31 12:36:54 2018 -0500
tree f6a855939173eaf8a5a4d6bfc84a87fff8255a0e
parent b718551571983f281d065e818da4fd9ca5723d89

Add casts to removed undefined behaviors around shifts.

Fixes #4246
Fixes #4247

objectivec/GPBCodedInputStream.m

diff --git a/objectivec/GPBCodedInputStream.m b/objectivec/GPBCodedInputStream.m
index 0759640..a8262e5 100644
--- a/objectivec/GPBCodedInputStream.m
+++ b/objectivec/GPBCodedInputStream.m
@@ -110,7 +110,7 @@
   int64_t result = 0;
   while (shift < 64) {
     int8_t b = ReadRawByte(state);
-    result |= (int64_t)(b & 0x7F) << shift;
+    result |= (int64_t)((uint64_t)(b & 0x7F) << shift);
     if ((b & 0x80) == 0) {
       return result;
     }