Support/raw_ostream: Fix uninitalized variable in raw_fd_ostream constructor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123643 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index 0279f40cabad0f6465a8fb5bfa19107edf169a50..e7d75e712860bc47188a126f2422d38a20b3cb35 100644 (file)
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -433,6 +433,13 @@ raw_fd_ostream::raw_fd_ostream(int fd, bool shouldClose, bool unbuffered)
   if (fd == STDOUT_FILENO || fd == STDERR_FILENO)
     setmode(fd, O_BINARY);
 #endif
+
+  // Get the starting position.
+  off_t loc = ::lseek(FD, 0, SEEK_CUR);
+  if (loc == (off_t)-1)
+    pos = 0;
+  else
+    pos = static_cast<uint64_t>(loc);
 }
 
 raw_fd_ostream::~raw_fd_ostream() {