[all-commits] [llvm/llvm-project] b8d1f3: [Clang] Fix an integer overflow issue in computing...

[Younan Zhang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: b8d1f3d62746110ff0c969a136fc15f1d52f811d
      https://github.com/llvm/llvm-project/commit/b8d1f3d62746110ff0c969a136fc15f1d52f811d
  Author: Younan Zhang <zyn7109 at gmail.com>
  Date:   2025-02-26 (Wed, 26 Feb 2025)

  Changed paths:
    M clang/lib/Sema/SemaTemplateDeductionGuide.cpp
    M clang/test/SemaTemplate/deduction-guide.cpp

  Log Message:
  -----------
  [Clang] Fix an integer overflow issue in computing CTAD's parameter depth (#128704)

There were some cases where we computed incorrect template parameter
depths for synthesized CTAD, invalid as they might be, we still
shouldn't crash anyway.

Technically the only scenario in which the inner function template's
depth is 0 is when it lives within an explicit template specialization,
where the template parameter list is empty.

Fixes https://github.com/llvm/llvm-project/issues/128691



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