This is occurring for me consistently on Chrome OS, and is blocking me from working on another Pri 1.

Program received signal SIGSEGV, Segmentation fault.
0x0000555558e09a95 in std::unique_ptr<TabDragController, std::default_delete<TabDragController> >::get (
    this=0xcdcdcdcdcdcdd0ed) at /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/unique_ptr.h:234
234           { return std::get<0>(_M_t); }
(gdb) where
#0  0x0000555558e09a95 in std::unique_ptr<TabDragController, std::default_delete<TabDragController> >::get (
    this=0xcdcdcdcdcdcdd0ed) at /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/unique_ptr.h:234
#1  0x0000555558e0b4b9 in std::unique_ptr<TabDragController, std::default_delete<TabDragController> >::release (
    this=0xcdcdcdcdcdcdd0ed) at /usr/lib/gcc/x86_64-linux-gnu/4.8/../../../../include/c++/4.8/bits/unique_ptr.h:251
#2  0x0000555558e0733c in TabStrip::ReleaseDragController (this=0xcdcdcdcdcdcdcdcd)
    at ../../chrome/browser/ui/views/tabs/tab_strip.cc:2175
#3  0x0000555558defa51 in TabDragController::Detach (this=0x41efb95b220, 
    release_capture=TabDragController::RELEASE_CAPTURE)
    at ../../chrome/browser/ui/views/tabs/tab_drag_controller.cc:974
#4  0x0000555558def26f in TabDragController::DetachIntoNewBrowserAndRunMoveLoop (this=0x41efb95b220, 
    point_in_screen=...) at ../../chrome/browser/ui/views/tabs/tab_drag_controller.cc:1061
#5  0x0000555558deded9 in TabDragController::DragBrowserToNewTabStrip (this=0x41efb95b220, target_tabstrip=0x0, 
    point_in_screen=...) at ../../chrome/browser/ui/views/tabs/tab_drag_controller.cc:575
#6  0x0000555558decc79 in TabDragController::ContinueDragging (this=0x41efb95b220, point_in_screen=...)
    at ../../chrome/browser/ui/views/tabs/tab_drag_controller.cc:540
#7  0x0000555558dea8a1 in TabDragController::Drag (this=0x41efb95b220, point_in_screen=...)
    at ../../chrome/browser/ui/views/tabs/tab_drag_controller.cc:397
#8  0x0000555558e02a92 in TabStrip::ContinueDrag (this=0x41efb27dc20, view=0x41efb27dc20, event=...)
    at ../../chrome/browser/ui/views/tabs/tab_strip.cc:1319
#9  0x0000555558e0864f in TabStrip::OnGestureEvent (this=0x41efb27dc20, event=0x41efa4171a0)
    at ../../chrome/browser/ui/views/tabs/tab_strip.cc:2847
#10 0x00007fffeca836eb in ui::EventHandler::OnEvent (this=0x41efb27dcd0, event=0x41efa4171a0)
    at ../../ui/events/event_handler.cc:35
#11 0x00007fffeca7f0c0 in ui::EventDispatcher::DispatchEvent (this=0x7fffffff6548, handler=0x41efb27dcd0, 
    event=0x41efa4171a0) at ../../ui/events/event_dispatcher.cc:191
#12 0x00007fffeca7ea1b in ui::EventDispatcher::ProcessEvent (this=0x7fffffff6548, target=0x41efb27dc50, 
    event=0x41efa4171a0) at ../../ui/events/event_dispatcher.cc:139
#13 0x00007fffeca7e7b2 in ui::EventDispatcherDelegate::DispatchEventToTarget (this=0x41efbc3be68, 
    target=0x41efb27dc50, event=0x41efa4171a0) at ../../ui/events/event_dispatcher.cc:86
#14 0x00007fffeca7e692 in ui::EventDispatcherDelegate::DispatchEvent (this=0x41efbc3be68, target=0x41efb27dc50, 
    event=0x41efa4171a0) at ../../ui/events/event_dispatcher.cc:58
#15 0x00007fffeca842fb in ui::EventProcessor::OnEventFromSource (this=0x41efbc3be68, event=0x41efb1a36a0)
    at ../../ui/events/event_processor.cc:35
#16 0x00007fffeca85365 in ui::EventSource::DeliverEventToProcessor (this=0x41efa22d928, event=0x41efb1a36a0)
    at ../../ui/events/event_source.cc:73
#17 0x00007fffeca84fec in ui::EventSource::SendEventToProcessor (this=0x41efa22d928, event=0x41efb1a36a0)
    at ../../ui/events/event_source.cc:51
#18 0x00007fffec94e74c in views::Widget::OnGestureEvent (this=0x41efa22d920, event=0x41efb1a36a0)
    at ../../ui/views/widget/widget.cc:1261
#19 0x00007fffec988751 in views::NativeWidgetAura::OnGestureEvent (this=0x41efbbccaa0, event=0x41efb1a36a0)
    at ../../ui/views/widget/native_widget_aura.cc:906
#20 0x00007fffeca836eb in ui::EventHandler::OnEvent (this=0x41efbbccaa8, event=0x41efb1a36a0)
    at ../../ui/events/event_handler.cc:35
#21 0x00007fffeca7f0c0 in ui::EventDispatcher::DispatchEvent (this=0x7fffffff7a78, handler=0x41efbbccaa8, 
    event=0x41efb1a36a0) at ../../ui/events/event_dispatcher.cc:191
#22 0x00007fffeca7ea1b in ui::EventDispatcher::ProcessEvent (this=0x7fffffff7a78, target=0x41efa9424c8, 
    event=0x41efb1a36a0) at ../../ui/events/event_dispatcher.cc:139
#23 0x00007fffeca7e7b2 in ui::EventDispatcherDelegate::DispatchEventToTarget (this=0x41efa4d5160, 
    target=0x41efa9424c8, event=0x41efb1a36a0) at ../../ui/events/event_dispatcher.cc:86
#24 0x00007fffeca7e692 in ui::EventDispatcherDelegate::DispatchEvent (this=0x41efa4d5160, target=0x41efa9424c8, 
    event=0x41efb1a36a0) at ../../ui/events/event_dispatcher.cc:58
#25 0x00007fffecba2926 in aura::WindowEventDispatcher::ProcessGestures (this=0x41efa4d5160, target=0x41efa9424a0, 
    gestures=0x41efd6e2560) at ../../ui/aura/window_event_dispatcher.cc:308
#26 0x00007fffecba4a98 in aura::WindowEventDispatcher::PostDispatchEvent (this=0x41efa4d5160, target=0x41efa9424c8, 
    event=...) at ../../ui/aura/window_event_dispatcher.cc:514
#27 0x00007fffeca7e714 in ui::EventDispatcherDelegate::DispatchEvent (this=0x41efa4d5160, target=0x41efa9424c8, 
    event=0x7fffffff9b10) at ../../ui/events/event_dispatcher.cc:62
#28 0x00007fffeca842fb in ui::EventProcessor::OnEventFromSource (this=0x41efa4d5160, event=0x7fffffff9b10)
    at ../../ui/events/event_processor.cc:35
#29 0x00007fffeca85365 in ui::EventSource::DeliverEventToProcessor (this=0x41ef9f6a038, event=0x7fffffff9b10)
    at ../../ui/events/event_source.cc:73
#30 0x00007fffeca84fec in ui::EventSource::SendEventToProcessor (this=0x41ef9f6a038, event=0x7fffffff9b10)
    at ../../ui/events/event_source.cc:51
#31 0x00007fffebfe12db in ash::AshWindowTreeHostX11::TranslateAndDispatchLocatedEvent (this=0x41ef9f6a020, 
    event=0x7fffffff9b10) at ../../ash/host/ash_window_tree_host_x11.cc:235
#32 0x00007fffecbb41ff in aura::WindowTreeHostX11::DispatchXI2Event (this=0x41ef9f6a030, 
    event=@0x7fffffffaf20: 0x7fffffffb098) at ../../ui/aura/window_tree_host_x11.cc:501
#33 0x00007fffecbb3d11 in aura::WindowTreeHostX11::DispatchEvent (this=0x41ef9f6a030, 
    event=@0x7fffffffafe0: 0x7fffffffb098) at ../../ui/aura/window_tree_host_x11.cc:316
#34 0x00007ffff7e8cbcf in ui::PlatformEventSource::DispatchEvent (this=0x41ef9e36a48, platform_event=0x7fffffffb098)
    at ../../ui/events/platform/platform_event_source.cc:83
#35 0x00007fffebcac944 in ui::X11EventSourceGlib::ProcessXEvent (this=0x41ef9e36a40, xevent=0x7fffffffb098)
    at ../../ui/events/platform/x11/x11_event_source_glib.cc:65
#36 0x00007fffebc9fb7a in ui::X11EventSource::ExtractCookieDataDispatchEvent (this=0x41ef9e36af0, 
    xevent=0x7fffffffb098) at ../../ui/events/platform/x11/x11_event_source.cc:148
#37 0x00007fffebc9fab1 in ui::X11EventSource::DispatchXEvents (this=0x41ef9e36af0)
    at ../../ui/events/platform/x11/x11_event_source.cc:115