gistfile1.txt

diff --git a/lld/ELF/InputFiles.cpp b/lld/ELF/InputFiles.cpp
index e35e85dba9b2..128f6a02a4b0 100644
--- a/lld/ELF/InputFiles.cpp
+++ b/lld/ELF/InputFiles.cpp
@@ -444,7 +444,19 @@ void ObjFile<ELFT>::initializeSections(
 
       // We only support GRP_COMDAT type of group. Get the all entries of the
       // section here to let getShtGroupEntries to check the type early for us.
-      ArrayRef<Elf_Word> Entries = getShtGroupEntries(Sec);
+      ArrayRef<Elf_Word> Entries =
+          CHECK(Obj.template getSectionContentsAsArray<Elf_Word>(&Sec), this);
+      if (Entries.empty())
+        fatal(toString(this) + ": empty SHT_GROUP");
+
+      // The first word of a SHT_GROUP section contains flags. Currently,
+      // the standard defines only "GRP_COMDAT" flag for the COMDAT group.
+      // An group with the empty flag doesn't define anything; such sections
+      // are just skipped.
+      if (Entries[0] == 0)
+        continue;
+      if (Entries[0] != GRP_COMDAT)
+        fatal(toString(this) + ": unsupported SHT_GROUP format");
 
       // If it is a new section group, we want to keep group members.
       // Group leader sections, which contain indices of group members, are
@@ -458,7 +470,7 @@ void ObjFile<ELFT>::initializeSections(
       }
 
       // Otherwise, discard group members.
-      for (uint32_t SecIndex : Entries) {
+      for (uint32_t SecIndex : Entries.slice(1)) {
         if (SecIndex >= Size)
           fatal(toString(this) +
                 ": invalid section index in group: " + Twine(SecIndex));