Remove assertion that can be triggered on bad input.

clang-format can't do anything useful, so it should leave the remainder
of the line unchanged, but it should not assert/segfault.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177530 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 5 insertions, 3 deletions

diff --git a/lib/Format/Format.cpp b/lib/Format/Format.cpp
index b1005b5de6..b4cbfec8c4 100644
--- a/lib/Format/Format.cpp
+++ b/lib/Format/Format.cpp
@@ -601,9 +601,8 @@ private:
   unsigned addTokenToState(bool Newline, bool DryRun, LineState &State) {
     const AnnotatedToken &Current = *State.NextToken;
     const AnnotatedToken &Previous = *State.NextToken->Parent;
-    assert(State.Stack.size());
 
-    if (Current.Type == TT_ImplicitStringLiteral) {
+    if (State.Stack.size() == 0 || Current.Type == TT_ImplicitStringLiteral) {
       State.Column += State.NextToken->FormatTok.WhiteSpaceLength +
                       State.NextToken->FormatTok.TokenLength;
       if (State.NextToken->Children.empty())
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index 2a3d66dfd7..0edb19166d 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -2413,7 +2413,10 @@ TEST_F(FormatTest, IncorrectAccessSpecifier) {
                "B { int x; }");
 }
 
-TEST_F(FormatTest, IncorrectCodeUnbalancedBraces) { verifyFormat("{"); }
+TEST_F(FormatTest, IncorrectCodeUnbalancedBraces) {
+  verifyFormat("{");
+  verifyFormat("#})");
+}
 
 TEST_F(FormatTest, IncorrectCodeDoNoWhile) {
   verifyFormat("do {\n}");