clang-format: Fix crasher on weird comments.

Crashing input:
  /\
  / comment

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@226454 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Format/TokenAnnotator.cpp b/lib/Format/TokenAnnotator.cpp
index 58902bfbd69a9004b5591cdbc58869b26fa244e2..df6bfd37ae0c87eba4354401f105d3bc4fe9b149 100644 (file)
--- a/lib/Format/TokenAnnotator.cpp
+++ b/lib/Format/TokenAnnotator.cpp
@@ -838,10 +838,8 @@ private:
                (!Current.Previous || Current.Previous->isNot(tok::l_square))) {
       Current.Type = TT_BinaryOperator;
     } else if (Current.is(tok::comment)) {
-      if (Current.TokenText.startswith("//"))
-        Current.Type = TT_LineComment;
-      else
-        Current.Type = TT_BlockComment;
+      Current.Type =
+          Current.TokenText.startswith("/*") ? TT_BlockComment : TT_LineComment;
     } else if (Current.is(tok::r_paren)) {
       if (rParenEndsCast(Current))
         Current.Type = TT_CastRParen;

diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index f267c94b6d34b396d4c5101ebe513b56505e3ae5..615b46a1d4ee280431d86d054037df394b27831c 100644 (file)
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -1035,6 +1035,9 @@ TEST_F(FormatTest, UnderstandsSingleLineComments) {
                    "     // spanning two lines\n"
                    " x + 3) {\n"
                    "}"));
+
+  verifyNoCrash("/\\\n/");
+  verifyNoCrash("/\\\n* */");
 }
 
 TEST_F(FormatTest, KeepsParameterWithTrailingCommentsOnTheirOwnLine) {