[PATCH] D130208: [lld-macho] Fix assertion when two symbols at same addr have unwind info

[Jez Ng via Phabricator via llvm-commits]

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If there are multiple symbols at the same address, our unwind info
implementation assumes that we always register unwind entries to a
single canonical symbol.

This assumption was violated by the `registerEhFrame` code.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D130208

Files:
  lld/MachO/InputFiles.cpp
  lld/MachO/UnwindInfoSection.cpp
  lld/test/MachO/Inputs/double-unwind-info.yaml
  lld/test/MachO/double-unwind-info.s

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