diff --git a/gm/aaa.cpp b/gm/aaa.cpp
index 4788969..72f953a 100644
--- a/gm/aaa.cpp
+++ b/gm/aaa.cpp
@@ -61,6 +61,20 @@
         path.lineTo(SkBits2Float(0x429b9d5c), SkBits2Float(0x4367a041));  // 77.8073f, 231.626f
         path.close();
         canvas->drawPath(path, p);
+
+        // The following path reveals a subtle SkAnalyticQuadraticEdge::updateQuadratic bug:
+        // we should not use any snapped y for the intermediate values whose error may accumulate;
+        // snapping should only be allowed once before updateLine.
+        path.reset();
+        path.moveTo(SkBits2Float(0x434ba71e), SkBits2Float(0x438a06d0));  // 203.653f, 276.053f
+        path.lineTo(SkBits2Float(0x43492a74), SkBits2Float(0x4396d70d));  // 201.166f, 301.68f
+        // 200.921f, 304.207f, 196.939f, 303.82f, 0.707107f
+        path.conicTo(SkBits2Float(0x4348ebaf), SkBits2Float(0x43981a75),
+                SkBits2Float(0x4344f079), SkBits2Float(0x4397e900), SkBits2Float(0x3f3504f3));
+        path.close();
+        // Manually setting convexity is required. Otherwise, this path will be considered concave.
+        path.setConvexity(SkPath::kConvex_Convexity);
+        canvas->drawPath(path, p);
     }
 
 private: