[clang] [Clang][Sema] Diagnose unexpanded packs in the template argument lists of function template specializations (PR #76677)

[Krystian Stasiowski via cfe-commits]

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@@ -518,6 +518,7 @@ Improvements to Clang's diagnostics
 - Clang now diagnoses definitions of friend function specializations, e.g. ``friend void f<>(int) {}``.
 - Clang now diagnoses narrowing conversions involving const references.
   (`#63151: <https://github.com/llvm/llvm-project/issues/63151>`_).
+- Clang now diagnoses unexpanded packs within the template argument lists of function template specializations.
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sdkrystian wrote:

@erichkeane I just looked -- I don't see an open issue.

https://github.com/llvm/llvm-project/pull/76677