[clang] [clang][analyzer] Stable order for SymbolRef-keyed containers (PR #121749)

[Arseniy Zaostrovnykh via cfe-commits]

necto wrote:

@steakhal I've fixed the buildbot error ensued after https://github.com/llvm/llvm-project/pull/121551 was merged

https://github.com/llvm/llvm-project/pull/121749