Fix opening session-archives

diff --git a/libs/ardour/find_session.cc b/libs/ardour/find_session.cc
index 3301dfd20d9dbd86a228258150cd4dec34bc1934..05f88d83b35fccbd622463adc6f46e43f545ff3d 100644 (file)
--- a/libs/ardour/find_session.cc
+++ b/libs/ardour/find_session.cc
@@ -215,9 +215,16 @@ inflate_session (const std::string& zipfile, const std::string& target_dir, stri
                        error << _("Archive does not contain a session folder") << endmsg;
                        return 3;
                }
-               if (bn[bn.length() - 1] == '/') {
-                       bn = bn.substr (0, bn.length() - 1);
+
+               size_t sep = bn.find_first_of ('/');
+
+               if (sep == string::npos) {
+                       error << _("Archive does not contain a session folder") << endmsg;
+                       return 3;
                }
+
+               bn = bn.substr (0, sep);
+
                if (bn.empty ()) {
                        error << _("Archive does not contain a valid session structure") << endmsg;
                        return 4;