Another generic ELF target assertion failure

[Alan Modra]

After fixing the ld-elf/pr22836-1a segmentation fault we run into an
assertion failure due to the generic ELF target not removing empty
SHT_GROUP sections.  Avoid that.

	* elf.c (bfd_elf_set_group_contents): Exit on zero size section.

diff --git a/bfd/elf.c b/bfd/elf.c
index 952e4bfe11..b463f1df8b 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -3472,7 +3472,8 @@ bfd_elf_set_group_contents (bfd *abfd, asection *sec, void *failedptrarg)
 
   /* Ignore linker created group section.  See elfNN_ia64_object_p in
      elfxx-ia64.c.  */
-  if (((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP)
+  if ((sec->flags & (SEC_GROUP | SEC_LINKER_CREATED)) != SEC_GROUP
+      || sec->size == 0
       || *failedptr)
     return;
 

-- 
Alan Modra
Australia Development Lab, IBM