A text group kept at the bottom of the page, on a master element,
connects to its project's XRefPropertiesChanged with a lambda that has
no context object. The connection belongs to the project, so it
outlives the group: once the group is deleted (paste a coil, undo,
then make any other edit), changing a cross-reference setting in the
project properties calls QTimer::singleShot() on the freed group and
QElectroTech crashes.
Pass the group as the context of that connection and of the
linkedElementChanged one beside it, so Qt removes both when the group
goes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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