From 449208d95b9418306e1250429211e056f9af2940 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Wed, 15 Jul 2015 20:45:56 +0000
Subject: Handle the error of trying to convert a regular archive to a thin
 one.

While at it, test that we can add to a thin archive.

llvm-svn: 242330
---
 llvm/lib/Object/ArchiveWriter.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'llvm/lib/Object/ArchiveWriter.cpp')

diff --git a/llvm/lib/Object/ArchiveWriter.cpp b/llvm/lib/Object/ArchiveWriter.cpp
index bcd5382..b555b8c 100644
--- a/llvm/lib/Object/ArchiveWriter.cpp
+++ b/llvm/lib/Object/ArchiveWriter.cpp
@@ -318,6 +318,9 @@ llvm::writeArchive(StringRef ArcName,
       MemberRef = Buffers.back()->getMemBufferRef();
     } else {
       object::Archive::child_iterator OldMember = Member.getOld();
+      assert(!Thin ||
+             OldMember->getParent()->isThin() &&
+                 "Thin archives cannot refers to member of other archives");
       ErrorOr<MemoryBufferRef> MemberBufferOrErr =
           OldMember->getMemoryBufferRef();
       if (auto EC = MemberBufferOrErr.getError())
-- 
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