From 0c594ccc29f6ba241627f436ba3d05fc400d1066 Mon Sep 17 00:00:00 2001
From: Richard Levitte <levitte@openssl.org>
Date: Tue, 13 Nov 2018 18:49:21 +0100
Subject: [PATCH] Configuration: make sure the shared_sources table doesn't
 contain empty elements

Fixes #7634

Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7635)
---
 Configure | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Configure b/Configure
index c84722a4e6..b3328928df 100755
--- a/Configure
+++ b/Configure
@@ -2203,8 +2203,8 @@ EOF
             next unless defined($unified_info{includes}->{$dest}->{$k});
             my @incs = reverse @{$unified_info{includes}->{$dest}->{$k}};
             foreach my $obj (grep /\.o$/,
-                             (keys %{$unified_info{sources}->{$dest}},
-                              keys %{$unified_info{shared_sources}->{$dest}})) {
+                             (keys %{$unified_info{sources}->{$dest} // {}},
+                              keys %{$unified_info{shared_sources}->{$dest} // {}})) {
                 foreach my $inc (@incs) {
                     unshift @{$unified_info{includes}->{$obj}->{$k}}, $inc
                         unless grep { $_ eq $inc } @{$unified_info{includes}->{$obj}->{$k}};
-- 
2.25.1