Commit: 32ee2ffc7d3ed530567b751c5f923ee331b778b9
Author: Hans Goudey
Date:   Thu Jun 9 15:40:07 2022 +0200
Branches: master
https://developer.blender.org/rB32ee2ffc7d3ed530567b751c5f923ee331b778b9

Fix: Crash in selection paint brush with empty curves

===================================================================

M       source/blender/editors/sculpt_paint/curves_sculpt_selection_paint.cc

===================================================================

diff --git 
a/source/blender/editors/sculpt_paint/curves_sculpt_selection_paint.cc 
b/source/blender/editors/sculpt_paint/curves_sculpt_selection_paint.cc
index 30793c45bd0..69615a3bfb4 100644
--- a/source/blender/editors/sculpt_paint/curves_sculpt_selection_paint.cc
+++ b/source/blender/editors/sculpt_paint/curves_sculpt_selection_paint.cc
@@ -83,6 +83,9 @@ struct SelectionPaintOperationExecutor {
     curves_id_ = static_cast<Curves *>(object_->data);
     curves_ = &CurvesGeometry::wrap(curves_id_->geometry);
     curves_id_->flag |= CV_SCULPT_SELECTION_ENABLED;
+    if (curves_->curves_num() == 0) {
+      return;
+    }
 
     brush_ = 
BKE_paint_brush_for_read(&ctx_.scene->toolsettings->curves_sculpt->paint);
     brush_radius_base_re_ = BKE_brush_size_get(ctx_.scene, brush_);

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