From bff9bf728e1623ac01ef0230d86832592796b6d3 Mon Sep 17 00:00:00 2001
From: Jacques Lucke <jacques@blender.org>
Date: Thu, 5 May 2022 12:51:14 +0200
Subject: Fix T97774: don't crash when no brush is selected

---
 source/blender/editors/sculpt_paint/curves_sculpt_ops.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc b/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc
index d773b4e70a7..d8713c8eb1d 100644
--- a/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc
+++ b/source/blender/editors/sculpt_paint/curves_sculpt_ops.cc
@@ -149,6 +149,12 @@ static void stroke_done(const bContext *C, PaintStroke *stroke)
 
 static int sculpt_curves_stroke_invoke(bContext *C, wmOperator *op, const wmEvent *event)
 {
+  Paint *paint = BKE_paint_get_active_from_context(C);
+  Brush *brush = BKE_paint_brush(paint);
+  if (brush == nullptr) {
+    return OPERATOR_CANCELLED;
+  }
+
   SculptCurvesBrushStrokeData *op_data = MEM_new<SculptCurvesBrushStrokeData>(__func__);
   op_data->stroke = paint_stroke_new(C,
                                      op,
-- 
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