[llvm] [llvm-strip] Remove empty SHT_GROUP sections. (PR #97204)

[Dmitriy Chestnykh via llvm-commits]

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@@ -2206,8 +2206,16 @@ Error Object::removeSections(
   // Transfer removed sections into the Object RemovedSections container for use
   // later.
   std::move(Iter, Sections.end(), std::back_inserter(RemovedSections));
-  // Now finally get rid of them all together.
+  // Now get rid of them all together.
   Sections.erase(Iter, std::end(Sections));
+
+  // Finally iterate over all sections and erase empty SHT_GROUP sections.
+  for (auto Iter = Sections.begin(); Iter != Sections.end(); ++Iter) {
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chestnykh wrote:

Removed the braces. The loop cannot be rewritten to `auto I = Sections.begin(), E = Sections.End(); I != E; ++I` because `Sections` may change size every time

https://github.com/llvm/llvm-project/pull/97204