[lld] [lld-macho] Support archives without index (PR #132942)

[Nico Weber via llvm-commits]

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@@ -2156,9 +2156,34 @@ ArchiveFile::ArchiveFile(std::unique_ptr<object::Archive> &&f, bool forceHidden)
 void ArchiveFile::addLazySymbols() {
   // Avoid calling getMemoryBufferRef() on zero-symbol archive
   // since that crashes.
-  if (file->isEmpty() || file->getNumberOfSymbols() == 0)
+  if (file->isEmpty())
     return;
 
+  if (file->getNumberOfSymbols() == 0) {
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nico wrote:

`if (!file->hasSymbolTable())`?

https://github.com/llvm/llvm-project/pull/132942