[Doc parsing] Provide diagnostics for unknown documentation 
commands. // rdar://12381408


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181071 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/AST/CommentParser.cpp b/unittests/AST/CommentParser.cpp
index 3dce60a..d05fb58 100644
--- a/unittests/AST/CommentParser.cpp
+++ b/unittests/AST/CommentParser.cpp
@@ -58,7 +58,7 @@
   FileID File = SourceMgr.createFileIDForMemBuffer(Buf);
   SourceLocation Begin = SourceMgr.getLocForStartOfFile(File);
 
-  Lexer L(Allocator, Traits, Begin, Source, Source + strlen(Source));
+  Lexer L(Allocator, Diags, Traits, Begin, Source, Source + strlen(Source));
 
   Sema S(Allocator, SourceMgr, Diags, Traits, /*PP=*/ NULL);
   Parser P(L, S, Allocator, SourceMgr, Diags, Traits);