Index: InputFiles.cpp
===================================================================
--- InputFiles.cpp
+++ InputFiles.cpp
@@ -339,10 +339,10 @@
   uint32_t Index = this->getSectionIndex(Sym);
   if (Index == 0)
     return nullptr;
-  if (Index >= Sections.size() || !Sections[Index])
+  if (Index >= Sections.size())
     fatal(getFilename(this) + ": invalid section index: " + Twine(Index));
   InputSectionBase<ELFT> *S = Sections[Index];
-  if (S == &InputSectionBase<ELFT>::Discarded)
+  if (!S || S == &InputSectionBase<ELFT>::Discarded)
     return S;
   return S->Repl;
 }