1 files changed, 3 insertions, 1 deletions
diff --git a/src/pathops/SkDLineIntersection.cpp b/src/pathops/SkDLineIntersection.cpp
index 43c37decb8..5dcc067369 100644
--- a/src/pathops/SkDLineIntersection.cpp
+++ b/src/pathops/SkDLineIntersection.cpp
@@ -197,7 +197,8 @@ static int horizontal_coincident(const SkDLine& line, double y) {
 }
 
 double SkIntersections::HorizontalIntercept(const SkDLine& line, double y) {
-     return SkPinT((y - line[0].fY) / (line[1].fY - line[0].fY));
+    SkASSERT(line[1].fY != line[0].fY);
+    return SkPinT((y - line[0].fY) / (line[1].fY - line[0].fY));
 }
 
 int SkIntersections::horizontal(const SkDLine& line, double left, double right,
@@ -274,6 +275,7 @@ static int vertical_coincident(const SkDLine& line, double x) {
 }
 
 double SkIntersections::VerticalIntercept(const SkDLine& line, double x) {
+    SkASSERT(line[1].fX != line[0].fX);
     return SkPinT((x - line[0].fX) / (line[1].fX - line[0].fX));
 }