From e8b32e061006d1a62e464e7c2a5385ddd0cb4290 Mon Sep 17 00:00:00 2001
From: "Shawn O. Pearce" <spearce@spearce.org>
Date: Thu, 14 Feb 2008 01:34:34 -0500
Subject: fast-import: check return value from unpack_entry()

If the tree object we have asked for is deltafied in the packfile and
the delta did not apply correctly or was not able to be decompressed
from the packfile then we can get back NULL instead of the tree data.
This is (part of) the reason why read_sha1_file() can return NULL, so
we need to also handle it the same way.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/fast-import.c b/fast-import.c
index a523b17..9b71ccc 100644
--- a/fast-import.c
+++ b/fast-import.c
@@ -1204,6 +1204,8 @@ static void load_tree(struct tree_entry *root)
 			die("Not a tree: %s", sha1_to_hex(sha1));
 		t->delta_depth = myoe->depth;
 		buf = gfi_unpack_entry(myoe, &size);
+		if (!buf)
+			die("Can't load tree %s", sha1_to_hex(sha1));
 	} else {
 		enum object_type type;
 		buf = read_sha1_file(sha1, &type, &size);
-- 
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