Make raw_null_ostream flush its buffer in its destructor, so that

it conforms to the assertion added in r77245. This fixes a failure
in qa_override.c in clang's testsuite.

llvm-svn: 77255

1 files changed, 9 insertions, 0 deletions

diff --git a/llvm/lib/Support/raw_ostream.cpp b/llvm/lib/Support/raw_ostream.cpp
index 7e34e06c8dc..992c11a8220 100644
--- a/llvm/lib/Support/raw_ostream.cpp
+++ b/llvm/lib/Support/raw_ostream.cpp
@@ -438,6 +438,15 @@ uint64_t raw_svector_ostream::tell() {
 //  raw_null_ostream
 //===----------------------------------------------------------------------===//
 
+raw_null_ostream::~raw_null_ostream() {
+#ifndef NDEBUG
+  // ~raw_ostream asserts that the buffer is empty. This isn't necessary
+  // with raw_null_ostream, but it's better to have raw_null_ostream follow
+  // the rules than to change the rules just for raw_null_ostream.
+  flush();
+#endif
+}
+
 void raw_null_ostream::write_impl(const char *Ptr, size_t Size) {
 }