Fix clang-format segfault.
When annotating "lines" starting with ":", clang-format would segfault.
This could actually happen in valid code, e.g.
#define A :
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177283 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Format/TokenAnnotator.cpp b/lib/Format/TokenAnnotator.cpp
index 8267a25..4ac4c9b 100644
--- a/lib/Format/TokenAnnotator.cpp
+++ b/lib/Format/TokenAnnotator.cpp
@@ -319,6 +319,8 @@
Tok->Type = TT_ObjCMethodSpecifier;
break;
case tok::colon:
+ if (Tok->Parent == NULL)
+ return false;
// Colons from ?: are handled in parseConditional().
if (Tok->Parent->is(tok::r_paren) && Contexts.size() == 1) {
Tok->Type = TT_CtorInitializerColon;