**System Information**
Operating system: Linux-4.15.0-159-generic-x86_64-with-glibc2.27 64 Bits
Graphics card: Mesa DRI Intel(R) HD Graphics 5500 (BDW GT2) Intel Open Source Technology Center 4.6 (Core Profile) Mesa 20.0.8
**Blender Version**
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-10-21 10:07, hash: `rBe79e86018e38`
Worked: blender-2.83.19-candidate+v283.edee6f911c81
**Short description of error**
Hi I report this problem that occurs in Blender 3.0 and Blender 2.93LTS, when I apply the modifiers on an object with the Booleans that I created from several cylinders joined together, a main one joined to other two cylinders with a Boolean union obtained using the collections .
When I execute the Remesh command from the obtained object Blender goes into Crash, while if I recreate the same geometric composition in Blender 2.83 where the booleans with the collections are not supported the problem does not happen and the calculation of the Remesh command is successful and generates the new topology.
- The modifier was applied to a copy of Cube with holes by using **CTRL+A** > **Visual Geometry to Mesh**
This is a report generated from this previous (https: //developer.blender.org/T92355) but which was not deemed a Remesh related bug by Sebastian Parborg, so I had to create this new report to fix this anyway.
Thanks for your attention and I hope this issue is addressed, as this does not happen with Blender 2.83.
** crash report **
```
# Blender 3.0.0, Commit date: 2021-10-21 10:07, Hash e79e86018e38
bpy.context.space_data.show_restrict_column_viewport = True # Property
bpy.context.space_data.show_restrict_column_select = True # Property
bpy.data.scenes["Scene"].(null) = False # Property
bpy.data.scenes["Scene"].(null) = False # Property
bpy.data.scenes["Scene"].(null) = True # Property
bpy.data.scenes["Scene"].(null) = False # Property
bpy.data.scenes["Scene"].(null) = True # Property
bpy.data.scenes["Scene"].(null) = True # Property
bpy.ops.object.duplicate_move(OBJECT_OT_duplicate={"linked":False, "mode":'TRANSLATION'}, TRANSFORM_OT_translate={"value":(0, 0, 0), "orient_axis_ortho":'X', "orient_type":'GLOBAL', "orient_matrix":((0, 0, 0), (0, 0, 0), (0, 0, 0)), "orient_matrix_type":'GLOBAL', "constraint_axis":(False, False, False), "mirror":False, "use_proportional_edit":False, "proportional_edit_falloff":'SMOOTH', "proportional_size":1, "use_proportional_connected":False, "use_proportional_projected":False, "snap":False, "snap_target":'CLOSEST', "snap_point":(0, 0, 0), "snap_align":False, "snap_normal":(0, 0, 0), "gpencil_strokes":False, "cursor_transform":False, "texture_space":False, "remove_on_cancel":False, "view2d_edge_pan":False, "release_confirm":False, "use_accurate":False, "use_automerge_and_split":False}) # Operator
bpy.ops.object.duplicates_make_real() # Operator
bpy.ops.object.convert(target='MESH') # Operator
bpy.ops.transform.translate(value=(-4, -0, -0), orient_axis_ortho='X', orient_type='GLOBAL', orient_matrix=((1, 0, 0), (0, 1, 0), (0, 0, 1)), orient_matrix_type='GLOBAL', constraint_axis=(True, False, False), mirror=False, use_proportional_edit=False, proportional_edit_falloff='SMOOTH', proportional_size=1, use_proportional_connected=False, use_proportional_projected=False) # Operator
bpy.ops.transform.translate(value=(1, 0, 0), orient_axis_ortho='X', orient_type='GLOBAL', orient_matrix=((1, 0, 0), (0, 1, 0), (0, 0, 1)), orient_matrix_type='GLOBAL', constraint_axis=(True, False, False), mirror=False, use_proportional_edit=False, proportional_edit_falloff='SMOOTH', proportional_size=1, use_proportional_connected=False, use_proportional_projected=False) # Operator
Saved "retopology-experiments.blend" # Info
bpy.context.space_data.context = 'DATA' # Property
bpy.context.object.data.remesh_mode = 'QUAD' # Property
bpy.data.window_managers["WinMan"].(null) = False # Property
bpy.data.window_managers["WinMan"].(null) = True # Property
bpy.data.window_managers["WinMan"].(null) = True # Property
bpy.ops.object.quadriflow_remesh(use_mesh_symmetry=False, use_preserve_sharp=True, use_preserve_boundary=True) # Operator
# backtrace
/home/pafu/Software/blender-3.0.0/blender(BLI_system_backtrace+0x20) [0xafd5480]
/home/pafu/Software/blender-3.0.0/blender() [0x10a9d6b]
/lib/x86_64-linux-gnu/libc.so.6(+0x3f040) [0x7f87e6131040]
/home/pafu/Software/blender-3.0.0/blender(AUD_Device_getRate+0x3d) [0x9d4678d]
/home/pafu/Software/blender-3.0.0/blender(BKE_sound_scene_playing+0x20) [0x1199690]
/home/pafu/Software/blender-3.0.0/blender(wm_event_do_handlers+0xa6) [0x14a8b96]
/home/pafu/Software/blender-3.0.0/blender(WM_main+0x20) [0x149edb0]
/home/pafu/Software/blender-3.0.0/blender(main+0x31e) [0xf9287e]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xe7) [0x7f87e6113bf7]
/home/pafu/Software/blender-3.0.0/blender() [0x10a66cc]
# Python backtrace
```
**Exact steps for others to reproduce the error**
- Open .blend file
- Select the cube on the left with the modifiers applied
and perform the procedure below
- {nav Object Data Properties > Remesh > Quad > QuadriFlow Remesh}
- Refer image for the settings
{F11295360}
{F11366006}
This is the same file but I've remade the boolean without collection that is not supported by 2.83LTS and works fine
{F11366174}