[clang-format] Walk backwards from end() instead of forwards from rend().

This should've been forwards from rbegin(), reverse iterators are just
too confusing to be used by mere mortals. Fixes out-of-bounds walks over
the list.

llvm-svn: 265934

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index b25abeae937..76e87768bc6 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -718,7 +718,7 @@ void UnwrappedLineParser::readTokenWithJavaScriptASI() {
   if (PreviousMustBeValue && Line && Line->Tokens.size() > 1) {
     // If the token before the previous one is an '@', the previous token is an
     // annotation and can precede another identifier/value.
-    const FormatToken *PrePrevious = std::next(Line->Tokens.rend(), 2)->Tok;
+    const FormatToken *PrePrevious = std::prev(Line->Tokens.end(), 2)->Tok;
     if (PrePrevious->is(tok::at))
       return;
   }