guard against nil data source to avoid crashes

xi-editor · Nov 18, 2018 · b0e23d9 · b0e23d9
1 parent dc64731
commit b0e23d9
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/Sources/XiEditor/EditView.swift b/Sources/XiEditor/EditView.swift
@@ -360,6 +360,8 @@ final class EditView: NSView, NSTextInputClient, TextPlaneDelegate {
 
     /// timer callback to toggle the blink state
     @objc func _blinkInsertionPoint() {
+        guard dataSource != nil else { return }
+
         _cursorStateOn = !_cursorStateOn
         partialInvalidate(invalid: dataSource.lines.cursorInval)
     }