diff --git a/lib/Object/ELFObjectFile.cpp b/lib/Object/ELFObjectFile.cpp
index a11a9e016df..356288ffc51 100644
--- a/lib/Object/ELFObjectFile.cpp
+++ b/lib/Object/ELFObjectFile.cpp
@@ -36,7 +36,7 @@ ErrorOr<ObjectFile *> ObjectFile::createELFObjectFile(MemoryBuffer *Obj,
       R.reset(new ELFObjectFile<ELFType<support::little, 2, false> >(
           Obj, EC, BufferOwned));
     else
-      llvm_unreachable("Invalid alignment for ELF file!");
+      return object_error::parse_failed;
   else if (Ident.first == ELF::ELFCLASS32 && Ident.second == ELF::ELFDATA2MSB)
 #if !LLVM_IS_UNALIGNED_ACCESS_FAST
     if (MaxAlignment >= 4)
@@ -48,7 +48,7 @@ ErrorOr<ObjectFile *> ObjectFile::createELFObjectFile(MemoryBuffer *Obj,
       R.reset(new ELFObjectFile<ELFType<support::big, 2, false> >(Obj, EC,
                                                                   BufferOwned));
     else
-      llvm_unreachable("Invalid alignment for ELF file!");
+      return object_error::parse_failed;
   else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2MSB)
 #if !LLVM_IS_UNALIGNED_ACCESS_FAST
     if (MaxAlignment >= 8)
@@ -60,7 +60,7 @@ ErrorOr<ObjectFile *> ObjectFile::createELFObjectFile(MemoryBuffer *Obj,
       R.reset(new ELFObjectFile<ELFType<support::big, 2, true> >(Obj, EC,
                                                                  BufferOwned));
     else
-      llvm_unreachable("Invalid alignment for ELF file!");
+      return object_error::parse_failed;
   else if (Ident.first == ELF::ELFCLASS64 && Ident.second == ELF::ELFDATA2LSB) {
 #if !LLVM_IS_UNALIGNED_ACCESS_FAST
     if (MaxAlignment >= 8)
@@ -72,10 +72,10 @@ ErrorOr<ObjectFile *> ObjectFile::createELFObjectFile(MemoryBuffer *Obj,
       R.reset(new ELFObjectFile<ELFType<support::little, 2, true> >(
           Obj, EC, BufferOwned));
     else
-      llvm_unreachable("Invalid alignment for ELF file!");
+      return object_error::parse_failed;
   }
   else
-    report_fatal_error("Buffer is not an ELF object file!");
+    llvm_unreachable("Buffer is not an ELF object file!");
 
   if (EC)
     return EC;
diff --git a/test/Object/Inputs/corrupt-archive.a b/test/Object/Inputs/corrupt-archive.a
new file mode 100644
index 00000000000..f8940ff6420
Binary files /dev/null and b/test/Object/Inputs/corrupt-archive.a differ
diff --git a/test/Object/nm-archive.test b/test/Object/nm-archive.test
index fbbf051b478..d875d6c991c 100644
--- a/test/Object/nm-archive.test
+++ b/test/Object/nm-archive.test
@@ -33,3 +33,9 @@ RUN: llvm-nm -s %p/Inputs/archive-test.a-gnu-minimal
 
 Don't reject an empty archive.
 RUN: llvm-nm %p/Inputs/archive-test.a-empty
+
+This archive has an unaligned member and a unknown format member.
+GNU AR is able to parse the unaligned member and warns about the member with
+the unknown format. We should probably simply warn on both. For now just check
+that we don't produce an error.
+RUN: llvm-nm %p/Inputs/corrupt-archive.a