Don't reject an archive with just a symbol table.

It is pretty unambiguous how to interpret it and gnu ar accepts it too.

llvm-svn: 241750

3 files changed, 5 insertions, 1 deletions

diff --git a/llvm/lib/Object/Archive.cpp b/llvm/lib/Object/Archive.cpp
index d03c328ae3b..b9d949b4428 100644
--- a/llvm/lib/Object/Archive.cpp
+++ b/llvm/lib/Object/Archive.cpp
@@ -288,7 +288,7 @@ Archive::Archive(MemoryBufferRef Source, std::error_code &ec)
 
     ++i;
     if (i == e) {
-      ec = object_error::parse_failed;
+      ec = std::error_code();
       return;
     }
     Name = i->getRawName();
diff --git a/llvm/test/Object/Inputs/symtab-only.a b/llvm/test/Object/Inputs/symtab-only.a
new file mode 100644
index 00000000000..611236bf3a1
--- /dev/null
+++ b/llvm/test/Object/Inputs/symtab-only.a
diff --git a/llvm/test/Object/archive-toc.test b/llvm/test/Object/archive-toc.test
index 79a6e0e0ba8..93eb49ab784 100644
--- a/llvm/test/Object/archive-toc.test
+++ b/llvm/test/Object/archive-toc.test
@@ -34,3 +34,7 @@ THIN:      rw-r--r-- 1000/1000      8 2014-12-16 00:56:27.000000000 evenlen
 THIN-NEXT: rw-r--r-- 1000/1000      7 2014-12-16 00:56:27.000000000 oddlen
 THIN-NEXT: rwxr-xr-x 1000/1000   1465 2014-12-16 00:56:27.000000000 very_long_bytecode_file_name.bc
 THIN-NEXT: rw-r--r-- 1000/1000   2280 2014-12-16 00:56:27.000000000 IsNAN.o
+
+Test reading an archive with just a symbol table. We use to reject them.
+RUN: llvm-ar tv %p/Inputs/symtab-only.a | FileCheck --allow-empty --check-prefix=EMPTY %s
+EMPTY-NOT: {{.}}