Check the anchor along with the offset in treesit-indent-region

* lisp/treesit.el (treesit-indent-region): To compute a valid column,
having a non-nil offset is not enough, we need a non-nil anchor as
well.

diff --git a/lisp/treesit.el b/lisp/treesit.el
index 045fdf21cbaf388a7211949d2f33f62c208c2ea3..1decfc3d7cff9aec2c86cfe2229fb5cf8154c803 100644 (file)
--- a/lisp/treesit.el
+++ b/lisp/treesit.el
@@ -1533,7 +1533,7 @@ Similar to `treesit-indent', but indent a region instead."
         (dotimes (jdx idx)
           (let ((anchor (aref meta-vec (* jdx meta-len)))
                 (offset (aref meta-vec (+ 1 (* jdx meta-len)))))
-            (when offset
+            (when (and anchor offset)
               (let ((col (save-excursion
                            (goto-char anchor)
                            (+ offset (current-column)))))