===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/spawn.c,v
retrieving revision 1.21
retrieving revision 1.22
diff -u -r1.21 -r1.22
--- src/usr.bin/tmux/spawn.c	2020/04/13 20:51:57	1.21
+++ src/usr.bin/tmux/spawn.c	2020/04/23 05:48:42	1.22
@@ -1,4 +1,4 @@
-/* $OpenBSD: spawn.c,v 1.21 2020/04/13 20:51:57 nicm Exp $ */
+/* $OpenBSD: spawn.c,v 1.22 2020/04/23 05:48:42 nicm Exp $ */
 
 /*
  * Copyright (c) 2019 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -366,6 +366,7 @@
 			window_remove_pane(w, new_wp);
 		}
 		sigprocmask(SIG_SETMASK, &oldset, NULL);
+		environ_free(child);
 		return (NULL);
 	}
 
@@ -442,6 +443,8 @@
 
 	sigprocmask(SIG_SETMASK, &oldset, NULL);
 	window_pane_set_event(new_wp);
+
+	environ_free(child);
 
 	if (sc->flags & SPAWN_RESPAWN)
 		return (new_wp);