1 files changed, 3 insertions, 0 deletions
diff --git a/src/nvim/statusline.c b/src/nvim/statusline.c
index 05649e9b7f..feb67ad6fa 100644
--- a/src/nvim/statusline.c
+++ b/src/nvim/statusline.c
@@ -1373,6 +1373,9 @@ int build_stl_str_hl(win_T *wp, char *out, size_t outlen, char *fmt, char *opt_n
     // An invalid item was specified.
     // Continue processing on the next character of the format string.
     if (vim_strchr(STL_ALL, (uint8_t)(*fmt_p)) == NULL) {
+      if (*fmt_p == NUL) {  // can happen with "%0"
+        break;
+      }
       fmt_p++;
       continue;
     }