[clang] [clang-format] Don't crash on incomplete template declaration (PR #173433)

[Björn Schäpers via cfe-commits]

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@@ -29053,6 +29053,8 @@ TEST_F(FormatTest, KeywordedFunctionLikeMacros) {
                Style);
 }
 
+TEST_F(FormatTest, DoesNotCrashIncompleteCode) { verifyNoCrash("template <"); }
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HazardyKnusperkeks wrote:

I know, that's why I'm here fixing it, my IDE crashed. ;) I made the change, but honestly I don't care how it is formatted while it's incomplete, as soon as the complete code is there it should be correct.

https://github.com/llvm/llvm-project/pull/173433