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Beat Hangartner
0e2738b246
Closing a title block template editor crashed it. The editor deletes
itself on close; QWidget's destructor then deletes its children, and
some of them signal the editor as they go:
- the scene deselects its cells, so the view emits
selectedCellsChanged() to the editor's slot of the same name (when a
cell was selected);
- the undo stack is cleared, so it emits cleanChanged() to
updateEditorTitle() (when the template was edited).
Both slots then run on an object whose destructor has already run. A
Debug build aborts ("Called object is not of the correct type (class
destructor may have already run)"); a release build calls a member
function of a destroyed object.
Disconnect every child of the editor from it in the editor's
destructor, before the base destructors delete the children.
No file-format change, no change while the editor is open.
Tests: none automated; the editor needs the whole application.
Checked by hand (see the PR).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Beat Hangartner <beat@hangartners.ch>