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-rw-r--r--src/nvim/window.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/nvim/window.c b/src/nvim/window.c
index 63c46f243e..315d5f07de 100644
--- a/src/nvim/window.c
+++ b/src/nvim/window.c
@@ -4976,6 +4976,7 @@ static void last_status_rec(frame_T *fr, int statusline)
*/
int tabline_height(void)
{
+ assert(first_tabpage);
switch (p_stal) {
case 0: return 0;
case 1: return (first_tabpage->tp_next == NULL) ? 0 : 1;