[clang] [Clang] [Sema] Don't crash on unexpanded pack in invalid block literal (PR #110762)

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git-clang-format --diff 2aa1dbf9c92e3b27954ba9166c927616625073e8 daf41fb0502e54e4ab5c63ed2227b7be88297c74 --extensions cpp,h -- clang/test/SemaCXX/block-packs.cpp clang/include/clang/AST/ComputeDependence.h clang/include/clang/AST/Expr.h clang/include/clang/Sema/ScopeInfo.h clang/include/clang/Sema/Sema.h clang/include/clang/Sema/Template.h clang/lib/AST/ComputeDependence.cpp clang/lib/Sema/Sema.cpp clang/lib/Sema/SemaDecl.cpp clang/lib/Sema/SemaExpr.cpp clang/lib/Sema/SemaLambda.cpp clang/lib/Sema/SemaTemplate.cpp clang/lib/Sema/SemaTemplateInstantiate.cpp clang/lib/Sema/SemaTemplateVariadic.cpp
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View the diff from clang-format here.
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diff --git a/clang/lib/Sema/SemaTemplateVariadic.cpp b/clang/lib/Sema/SemaTemplateVariadic.cpp
index 19bd454766..42a075ae14 100644
--- a/clang/lib/Sema/SemaTemplateVariadic.cpp
+++ b/clang/lib/Sema/SemaTemplateVariadic.cpp
@@ -8,7 +8,6 @@
 //  This file implements semantic analysis for C++0x variadic templates.
 //===----------------------------------------------------------------------===/
 
-#include "clang/Sema/Sema.h"
 #include "TypeLocBuilder.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/RecursiveASTVisitor.h"
@@ -16,6 +15,7 @@
 #include "clang/Sema/Lookup.h"
 #include "clang/Sema/ParsedTemplate.h"
 #include "clang/Sema/ScopeInfo.h"
+#include "clang/Sema/Sema.h"
 #include "clang/Sema/SemaInternal.h"
 #include "clang/Sema/Template.h"
 #include "llvm/Support/SaveAndRestore.h"

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https://github.com/llvm/llvm-project/pull/110762