Correctly account for the Spaces array nul terminator. Thanks Chris!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79894 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index 64d920503dc5bceba3f270ea0096a3fdca20fac1..230d9a81340c1d6fcd9234a70e6018d7e525cd6a 100644 (file)
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -304,11 +304,12 @@ raw_ostream &raw_ostream::indent(unsigned NumSpaces) {
                                "                ";
 
   // Usually the indentation is small, handle it with a fastpath.
-  if (NumSpaces <= array_lengthof(Spaces))
+  if (NumSpaces < array_lengthof(Spaces))
     return write(Spaces, NumSpaces);
   
   while (NumSpaces) {
-    unsigned NumToWrite = std::min(NumSpaces, (unsigned)array_lengthof(Spaces));
+    unsigned NumToWrite = std::min(NumSpaces,
+                                   (unsigned)array_lengthof(Spaces)-1);
     write(Spaces, NumToWrite);
     NumSpaces -= NumToWrite;
   }