perl: Check all images are defined in first param of open_guest.

(cherry picked from commit e67e216118df3a724482cb698a868ecbaacbf326)

diff --git a/perl/lib/Sys/Guestfs/Lib.pm b/perl/lib/Sys/Guestfs/Lib.pm
index 85c4790..bd42ee2 100644 (file)
--- a/perl/lib/Sys/Guestfs/Lib.pm
+++ b/perl/lib/Sys/Guestfs/Lib.pm
@@ -145,6 +145,13 @@ sub open_guest
         croak __"open_guest: first parameter must be a string or an arrayref"
     }
 
+    # Check each element of @images is defined.
+    # (See https://bugzilla.redhat.com/show_bug.cgi?id=601092#c3).
+    foreach (@images) {
+        croak __"open_guest: first argument contains undefined element"
+            unless defined $_;
+    }
+
     my ($conn, $dom);
 
     if (-e $images[0]) {