Trying to rotate the dashed line in the attached file will result in a crash.
Reproduced in 0.92.1 in linux.
backtrace (also at https://paste.ubuntu.com/25004311):
(gdb) bt
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1 0x00007f804f2904ea in __GI_abort () at abort.c:118
#2 0x00007f804f287e37 in __assert_fail_base (fmt=<optimized out>, assertion=assertion@entry=0x7f80592509e8 "are_near(_ellipse.pointAt(t), i->point(), 1e-5)",
file=file@entry=0x7f80592509a0 "/build/inkscape-MxzU8f/inkscape-0.92.1/src/2geom/elliptical-arc.cpp", line=line@entry=573,
function=function@entry=0x7f8059250a60 "void Geom::EllipticalArc::_filterIntersections(std::vector<Geom::Intersection<> >&, bool) const") at assert.c:92
#3 0x00007f804f287ee2 in __GI___assert_fail (assertion=0x7f80592509e8 "are_near(_ellipse.pointAt(t), i->point(), 1e-5)",
file=0x7f80592509a0 "/build/inkscape-MxzU8f/inkscape-0.92.1/src/2geom/elliptical-arc.cpp", line=573,
function=0x7f8059250a60 "void Geom::EllipticalArc::_filterIntersections(std::vector<Geom::Intersection<> >&, bool) const") at assert.c:101
#4 0x00007f80590cf305 in Geom::EllipticalArc::_filterIntersections(std::vector<Geom::Intersection<double, double>, std::allocator<Geom::Intersection<double, double> > >&, bool) const () from /usr/bin/../lib/inkscape/libinkscape_base.so
#5 0x00007f80590d17c8 in Geom::EllipticalArc::intersect(Geom::Curve const&, double) const () from /usr/bin/../lib/inkscape/libinkscape_base.so
#6 0x00007f80590ed22d in Geom::Sweeper<Geom::CurveIntersectionSweepSet>::process() () from /usr/bin/../lib/inkscape/libinkscape_base.so
#7 0x00007f80590e907f in Geom::Path::intersect(Geom::Path const&, double) const () from /usr/bin/../lib/inkscape/libinkscape_base.so
#8 0x00007f80590f1689 in Geom::Sweeper<Geom::PathIntersectionSweepSet>::process() () from /usr/bin/../lib/inkscape/libinkscape_base.so
#9 0x00007f80590f065e in Geom::PathVector::intersect(Geom::PathVector const&, double) const () from /usr/bin/../lib/inkscape/libinkscape_base.so
#10 0x00007f8058ebcf31 in Inkscape::ObjectSnapper::_snapPathsConstrained(IntermSnapResults&, Inkscape::SnapCandidatePoint const&, Inkscape::Snapper::SnapConstraint const&, Geom::Point const&) const () from /usr/bin/../lib/inkscape/libinkscape_base.so
#11 0x00007f8058ebe01c in Inkscape::ObjectSnapper::constrainedSnap(IntermSnapResults&, Inkscape::SnapCandidatePoint const&, Geom::OptRect const&, Inkscape::Snapper::SnapConstraint const&, std::vector<SPItem const*, std::allocator<SPItem const*> > const*, std::vector<Inkscape::SnapCandidatePoint, std::allocator<Inkscape::SnapCandidatePoint> >*) const ()
from /usr/bin/../lib/inkscape/libinkscape_base.so
#12 0x00007f8058f0171e in SnapManager::constrainedSnap(Inkscape::SnapCandidatePoint const&, Inkscape::Snapper::SnapConstraint const&, Geom::OptRect const&) const ()
from /usr/bin/../lib/inkscape/libinkscape_base.so
#13 0x00007f8058ecb128 in Inkscape::PureRotateConstrained::snap(SnapManager*, Inkscape::SnapCandidatePoint const&, Geom::Point, Geom::OptRect const&) const ()
from /usr/bin/../lib/inkscape/libinkscape_base.so
#14 0x00007f8058ecba23 in Inkscape::PureTransform::snap(SnapManager*, std::vector<Inkscape::SnapCandidatePoint, std::allocator<Inkscape::SnapCandidatePoint> > const&, Geom::Point const&) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#15 0x00007f8058efd67b in SnapManager::snapTransformed(std::vector<Inkscape::SnapCandidatePoint, std::allocator<Inkscape::SnapCandidatePoint> > const&, Geom::Point const&, Inkscape::PureTransform&) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#16 0x00007f8058ef1165 in Inkscape::SelTrans::rotateRequest(Geom::Point&, unsigned int) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#17 0x00007f8058ef5ce0 in Inkscape::SelTrans::handleRequest(SPKnot*, Geom::Point*, unsigned int, SPSelTransHandle const&) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#18 0x00007f8058ef8d4f in sigc::internal::slot_call<sigc::bind_functor<-1, sigc::pointer_functor4<SPKnot*, Geom::Point*, unsigned int, SPSelTransHandle const*, int>, SPSelTransHandle const*, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>, bool, SPKnot*, Geom::Point*, unsigned int>::call_it(sigc::internal::slot_rep*, SPKnot* const&, Geom::Point* const&, unsigned int const&) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#19 0x00007f8058eadbb6 in SPKnot::requestPosition(Geom::Point const&, unsigned int) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#20 0x00007f8058eadd0f in sp_knot_handler_request_position(_GdkEvent*, SPKnot*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#21 0x00007f8058b5d7b1 in Inkscape::UI::Tools::sp_event_context_snap_watchdog_callback(void*) () from /usr/bin/../lib/inkscape/libinkscape_base.so
#22 0x00007f8056415343 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f80564148ca in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f8056414c80 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#25 0x00007f8056414fa2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007f8052b6d3b7 in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#27 0x000055a432d1085b in sp_main_gui(int, char const**) ()
#28 0x00007f804f27c2b1 in __libc_start_main (main=0x55a432d0e350 <main>, argc=2, argv=0x7ffef3cb70e8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>,
stack_end=0x7ffef3cb70d8) at ../csu/libc-start.c:291
#29 0x000055a432d0e8ba in _start ()
Originally reported at https://bugs.debian.org/864415
