--- a/gfx/skia/skia/src/core/SkPath.cpp
+++ b/gfx/skia/skia/src/core/SkPath.cpp
@@ -499,16 +499,19 @@ bool SkPath::isRectContour(bool allowPar
             case kCubic_Verb:
                 return false; // quadratic, cubic not allowed
             case kMove_Verb:
                 if (allowPartial && !autoClose && firstDirection) {
                     insertClose = true;
                     *currVerb -= 1;  // try move again afterwards
                     goto addMissingClose;
                 }
+                if (pts != *ptsPtr) {
+                    return false;
+                }
                 last = *pts++;
                 closedOrMoved = true;
                 break;
             default:
                 SkDEBUGFAIL("unexpected verb");
                 break;
         }
         *currVerb += 1;