From e59571ffcdcd942874f3fa8199c880b114d874f9 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 2 Aug 2016 13:56:20 +0200
Subject: Check for eof before streaming rdbuf

---
 bpkg/fetch.cxx | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'bpkg/fetch.cxx')

diff --git a/bpkg/fetch.cxx b/bpkg/fetch.cxx
index 85d6583..1c9b623 100644
--- a/bpkg/fetch.cxx
+++ b/bpkg/fetch.cxx
@@ -578,9 +578,14 @@ namespace bpkg
       // the manifest parsing.
       //
       ifdstream is (pr.in_ofd, fdstream_mode::binary);
-
       stringstream bs (ios::in | ios::out | ios::binary);
-      bs << is.rdbuf ();
+
+      // Note that the eof check is important: if the stream is at eof, write
+      // will fail.
+      //
+      if (is.peek () != ifdstream::traits_type::eof ())
+        bs << is.rdbuf ();
+
       is.close ();
 
       string sha256sum (sha256 (o, bs));
-- 
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