1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index b1209a2da7..a5cf629b07 100644
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -116,6 +116,7 @@ raw_ostream &raw_ostream::write(const char *Ptr, unsigned Size) {
       assert(OutBufCur == OutBufStart);
       memcpy(OutBufStart, Ptr, NumToEmit);
       Ptr += NumToEmit;
+      Size -= NumToEmit;
       OutBufCur = OutBufStart + NumToEmit;
       flush_impl();
     }