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qelectrotech-source-mirror/sources/ui
Shane Ringrose 5cc2e165bf Fix #527: use ApplicationModal for Project Properties to prevent SIGSEGV
ProjectPropertiesDialog::exec() was using Qt::WindowModal, which only
blocks the parent ProjectView window.  The MDI workspace and its other
subwindows remained interactive, so actions like new_project or
close_project could fire while the dialog's config pages still held raw
QETProject* pointers — leading to a SIGSEGV when Qt's event loop later
dispatched a signal through one of those stale pointers.

Detected by the 8-hour GUI fuzzer: action sequence add_diagram_page →
flood_wires ×18 → new_project while Project Properties was open
produced exit code -11 (SIGSEGV) on the first of 12,717 actions.

Switch to Qt::ApplicationModal so no window can receive input while the
dialog is open.  Project Properties is a short-lived dialog; blocking
the whole application for its duration matches user expectation and
removes the lifetime hazard without requiring QPointer surgery across
four config-page classes.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-06-22 17:30:20 +12:00
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