System Information
Operating system: Linux-5.2.11-1-MANJARO-x86_64-with-arch-Manjaro-Linux 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 435.21

Blender Version
Broken: version 2.81 (sub 14), Commit date: 2019-10-07 20:16, Hash a856c5eccffb
Broken: version 2.80 (sub 75), Commit date: 2019-07-29 14:47, Hash f6cb5f54494e

Short description of error
Leaving edit mode after using Mesh>Normals>Point To Target and specifying a target will crash Blender.

Exact steps for others to reproduce the error

1. File>Defaults>Load Factory Settings
2. With the default cube selected, go into edit mode (Tab)
3. Press Alt-L or use the menu Mesh>Normals>Point To Target
4. Press L (or O, or R, or ctrl-leftclick, or ctrl-rightclick)
5. Press Tab to exit edit mode, and Blender should crash

Link to documentation if needed:

• https://docs.blender.org/manual/en/dev/modeling/meshes/editing/normals.html#point-to-target

Blender 2.81 (sub 14), Commit date: 2019-10-07 20:16, Hash a856c5eccffb

bpy.ops.object.editmode_toggle() # Operator
bpy.ops.object.editmode_toggle() # Operator

backtrace

`/home/mark/Downloads/blender-2.81-git/blender(BLI_system_backtrace+0x33) [0x55a02447b003]
/home/mark/Downloads/blender-2.81-git/blender(+0xd47ccb) [0x55a02424bccb]
/usr/lib/libc.so.6(+0x3a7e0) [0x7fb7b2c3c7e0]
/home/mark/Downloads/blender-2.81-git/blender(BKE_editmesh_from_object+0) [0x55a0242c9c20]
/home/mark/Downloads/blender-2.81-git/blender(+0x14f6377) [0x55a0249fa377]
/home/mark/Downloads/blender-2.81-git/blender(+0x115aa00) [0x55a02465ea00]
/home/mark/Downloads/blender-2.81-git/blender(+0x115ba34) [0x55a02465fa34]
/home/mark/Downloads/blender-2.81-git/blender(+0x115d23c) [0x55a02466123c]
/home/mark/Downloads/blender-2.81-git/blender(wm_event_do_handlers+0x4ed) [0x55a024661a9d]
/home/mark/Downloads/blender-2.81-git/blender(WM_main+0x20) [0x55a024657370]
/home/mark/Downloads/blender-2.81-git/blender(main+0x314) [0x55a0242338e4]
/usr/lib/libc.so.6(__libc_start_main+0xf3) [0x7fb7b2c28ee3]
/home/mark/Downloads/blender-2.81-git/blender(_start+0x2e) [0x55a02424838e]`