When GrAAConvesTesselator was merging the first and last point of the array, it was deleting the la…

src/gpu/GrAAConvexTessellator.cpp

Index: src/gpu/GrAAConvexTessellator.cpp
diff --git a/src/gpu/GrAAConvexTessellator.cpp b/src/gpu/GrAAConvexTessellator.cpp
index 85ce7ba9ed6bc17681cbc791d7134210861e0539..e38ba3c3aed8c96a63ab83f70abb55c192e6ea79 100644
--- a/src/gpu/GrAAConvexTessellator.cpp
+++ b/src/gpu/GrAAConvexTessellator.cpp
@@ -681,7 +681,12 @@ bool GrAAConvexTessellator::createInsetRing(const Ring& lastRing, Ring* nextRing
         if (!dupPrevVsNext) {
             dst[cur] = fCandidateVerts.fuseWithPrior(lastRing.origEdgeID(cur));
         } else {
-            dst[cur] = dst[cur-1] = fCandidateVerts.fuseWithBoth();
+            const int fused = fCandidateVerts.fuseWithBoth();
+            dst[cur] = fused;
+            const int targetIdx = dst[cur - 1];
+            for (int i = cur - 1; i >= 0 && dst[i] == targetIdx; i--) {
+                dst[i] = fused;
+            }
         }
     }