Set $TMUX without the session when background jobs are run.

1 files changed, 1 insertions, 1 deletions

diff --git a/cmd.c b/cmd.c
index 6c4a06f4..5333a023 100644
--- a/cmd.c
+++ b/cmd.c
@@ -356,7 +356,7 @@ cmd_current_session(struct cmd_ctx *ctx)
 	}
 
 	/* Use the session from the TMUX environment variable. */
-	if (data != NULL && data->pid == getpid()) {
+	if (data != NULL && data->pid == getpid() && data->idx != -1) {
 		s = session_find_by_index(data->idx);
 		if (s != NULL)
 			return (s);