Fix crash issue for path animation and path interpulator

When set progress value out of [0,1], path animation and
path interpulator should make sure the value be modified
in the valid value range, otherwise the QQuickPath::backwardsPointAt()
will crash.

Task-number: QTBUG-24308
Change-Id: Icd6e9165c9f844ddb8ec84c229eac4db5246a749
Reviewed-by: Michael Brasser <michael.brasser@nokia.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/auto/quick/qquickanimations/data/pathAnimationInOutBackCrash.qml b/tests/auto/quick/qquickanimations/data/pathAnimationInOutBackCrash.qml
new file mode 100644
index 0000000000..1ee76f6906
--- /dev/null
+++ b/tests/auto/quick/qquickanimations/data/pathAnimationInOutBackCrash.qml
@@ -0,0 +1,26 @@
+import QtQuick 2.0
+Item {
+    id: root
+    width: 450; height: 600
+
+    Rectangle {
+        objectName:"rect"
+        id: rect
+        x:200
+        y:500
+        width: 225; height: 40
+        color: "lightsteelblue"
+    }
+    PathAnimation {
+        id:anim
+        running:true
+        duration: 200
+
+        easing.type: Easing.InOutBack
+
+        target:rect
+        path: Path {
+            PathLine { x: 0; y: 0 }
+        }
+    }
+}
\ No newline at end of file