Fix issue with empty notebooks

joouha · Apr 11, 2024 · d3e2e2a · d3e2e2a
1 parent 23cd5a6
commit d3e2e2a
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Showing 2 changed files with 4 additions and 3 deletions.
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
@@ -11,6 +11,7 @@ Upcoming
 Fixed
 =====
 
+- Fix rare bug causing exception when notebook has no cells
 - Prevent race condition causing duplicate cells at startup
 - Mark notebook as modified when changing cell type
 - Prevent ruff formatter deleting buffer contents

diff --git a/euporie/notebook/tabs/notebook.py b/euporie/notebook/tabs/notebook.py
@@ -250,9 +250,9 @@ def load_container(self) -> AnyContainer:
     @property
     def cell(self) -> Cell:
         """Return the currently selected `Cell` in this `Notebook`."""
-        cell = self.page.get_child().content
-        assert isinstance(cell, Cell)
-        return cell
+        if isinstance(cell := self.page.get_child().content, Cell):
+            return cell
+        return Cell(0, {}, self)
 
     # Editing specific stuff