[graphics/krita] libs/ui/tool: Fix safe assert when strokeId not available

Git commit 6f05bb554b65bcfc72684bd19f330236f3d0c35c by Emmet O'Neill, on behalf of Dat Le.
Committed on 13/08/2026 at 23:16.
Pushed by emmetoneill into branch 'master'.

Fix safe assert when strokeId not available

M  +4    -1    libs/ui/tool/KisAsyncColorSamplerHelper.cpp

https://invent.kde.org/graphics/krita/-/commit/6f05bb554b65bcfc72684bd19f330236f3d0c35c

diff --git a/libs/ui/tool/KisAsyncColorSamplerHelper.cpp b/libs/ui/tool/KisAsyncColorSamplerHelper.cpp
index 7beb9bcd046..0648ebb949c 100644
--- a/libs/ui/tool/KisAsyncColorSamplerHelper.cpp
+++ b/libs/ui/tool/KisAsyncColorSamplerHelper.cpp
@@ -466,7 +466,7 @@ QRectF KisAsyncColorSamplerHelper::colorPreviewDocRect(const QPointF &docPoint)
     m_d->style = cfg.colorSamplerPreviewStyle();
     QRectF previewDocRect = m_d->colorPreviewDocRect(docPoint);
 
-    if (previewDocRect != m_d->previewDocRect && m_d->circleZoomPreviewEnabled) prepareZoomPreview(previewDocRect);
+    if (previewDocRect != m_d->previewDocRect) prepareZoomPreview(previewDocRect);
 
     m_d->previewDocRect = previewDocRect;
 
@@ -474,6 +474,9 @@ QRectF KisAsyncColorSamplerHelper::colorPreviewDocRect(const QPointF &docPoint)
 }
 
 void KisAsyncColorSamplerHelper::prepareZoomPreview(const QRectF &docRect) {
+    // This can be called before startAction(), so there may not be a strokeId
+    if (!m_d->circleZoomPreviewEnabled || !m_d->strokeId) return;
+
     KisImageSP image = m_d->canvas->image();
     if (!image) return;