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-rw-r--r--lib/Support/raw_ostream.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index 5eaf7bf6a0..3ea5c9af83 100644
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -222,6 +222,8 @@ raw_ostream &raw_ostream::write(const char *Ptr, size_t Size) {
}
void raw_ostream::copy_to_buffer(const char *Ptr, size_t Size) {
+ assert(Size <= OutBufEnd - OutBufCur && "Buffer overrun!");
+
// Handle short strings specially, memcpy isn't very good at very short
// strings.
switch (Size) {