Index: ELF/Writer.cpp
===================================================================
--- ELF/Writer.cpp
+++ ELF/Writer.cpp
@@ -308,7 +308,8 @@
 }
 
 template <class ELFT>
-static bool shouldKeepInSymtab(InputSectionBase<ELFT> *Sec, StringRef SymName,
+static bool shouldKeepInSymtab(elf::ObjectFile<ELFT> *F,
+                               InputSectionBase<ELFT> *Sec, StringRef SymName,
                                const SymbolBody &B) {
   if (B.isFile())
     return false;
@@ -335,6 +336,9 @@
   if (Config->Discard == DiscardPolicy::Locals)
     return false;
 
+  if (!Sec)
+    fatal(getFilename(F) + ": object contains invalid symbols");
+
   return !(Sec->getSectionHdr()->sh_flags & SHF_MERGE);
 }
 
@@ -374,7 +378,7 @@
         fatal(getFilename(F) + ": invalid symbol name offset");
       StringRef SymName(StrTab.data() + B->getNameOffset());
       InputSectionBase<ELFT> *Sec = DR->Section;
-      if (!shouldKeepInSymtab<ELFT>(Sec, SymName, *B))
+      if (!shouldKeepInSymtab<ELFT>(F, Sec, SymName, *B))
         continue;
       ++Out<ELFT>::SymTab->NumLocals;
       if (Config->Relocatable)
Index: test/ELF/invalid/local-symbols.s
===================================================================
--- test/ELF/invalid/local-symbols.s
+++ test/ELF/invalid/local-symbols.s
@@ -0,0 +1,3 @@
+## local-symbols.elf has invalid local symbol.
+# RUN: not ld.lld %p/Inputs/local-symbols.elf -o %t2 2>&1 | FileCheck %s
+# CHECK: object contains invalid symbols