Another exception: one non-converted code path in projectprintwindow.cpp to be followed-up.
One issue found in the Qt6 code path of diagramview.cpp which has been fixed.
Covers the crash fixed in #868: a file forwarded from a second instance was
opened inside SingleApplication's socket handler, so the backup prompt's
nested event loop ran while that handler was still on the stack.
Run by hand; no build system or CI changes.
tests/ipc-regression/run.sh --binary build/qelectrotech
Validated in both directions on Qt 6.10.2: ceda1e082 (before the fix) crashes
3 times in 3 with exit 139, 199444b6 (after) survives 3 times in 3.
Three requirements are not obvious and are documented in the script:
- Qt 6 only. An unfixed Qt 5 build survives every attempt, so the script
refuses to run on a Qt 5 binary rather than report a pass that cannot fail.
- A Debug build. The same unfixed commit survives every attempt built
-O3 -DNDEBUG; whether a use-after-free faults depends on what the allocator
does with the freed block.
- Dismissing the backup prompt is the step that triggers it. Left open, the
stack never unwinds and nothing fails, which is why the bug was twice
reported as not reproducible.
The test runs in its own sandbox on its own X display, works on a copy of the
project so backup files do not land in examples/, and cleans up after itself.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Andre Rummler