ID 372721 - Nuke crashes when viewing a cropped Cornerpin node with a VectorBlur applied

Problem summary
Nuke crashes when viewing a cropped Cornerpin node with a VectorBlur applied.

Customer reported version
11.2__11.2v4

Customer reported platform
suse

Steps to reproduce:

1) From Nuke, create a Noise node.

2) Create a Shuffle node attached to the Noise with the following settings:

​

3) Attach a Crop node and adjust the box with any settings.

4) Create a VectorBlur node with the following settings:

​

5) Attach a Cornerpin node and set a keyframe at 0 and 50 for the following: 

​

6) Click and drag the timeline to move rapidly between keyframes and observe stability in Nuke.

Script that crashes when viewing the Cornerpin2D node and click and dragging the on the timeline:

set cut_paste_input [stack 0]

version 11.2 v4

push $cut_paste_input

Noise {

 center {1024 778}

 name Noise1

 selected true

 xpos 157

 ypos -214

}

Shuffle {

 out motion

 name Shuffle1

 selected true

 xpos 157

 ypos -176

}

Crop {

 box {0 0 1100 1556}

 name Crop1

 selected true

 xpos 157

 ypos -143

}

VectorBlur2 {

 channels rgba

 uv motion

 scale 3

 name VectorBlur1

 selected true

 xpos 157

 ypos -97

}

CornerPin2D {

 to1 {0 0}

 to2 {2048 0}

 to3 {{curve x1 0 x50 2048} {curve x1 0 x50 1556}}

 to4 {{curve x1 0 x50 0} {curve x1 1556 x50 1556}}

 invert false

 from1 {0 0}

 from2 {2048 0}

 from3 {2048 1556}

 from4 {0 1556}

 name CornerPin2D1

 selected true

 xpos 157

 ypos -42

}

Viewer {

 frame_range 1-100

 name Viewer1

 selected true

 xpos 157

 ypos 8

}

Workaround

Leave the Crop node out of the workflow, or place it after the Cornerpin2D node.

Reproduced by Support in:

Nuke 11.2v4 - Windows 10, CentOS 7

Nuke 11.2v1 - Windows 10

Nuke 11.1v6 - Windows 10

Nuke 11.1v1 - Windows 10

Nuke 11.0v4 - Windows 10

Nuke 11.0v1 - Windows 10

Nuke 10.5v7 - Windows 10

Nuke 10.5v1 - Windows 10

Nuke 10.0v6 - Windows 10

Nuke 10.0v1 - Windows 10, CentOS 7 - regression

Earliest version tested:
Nuke 9.0v9 - This issue no longer appears in this version and has regressed

Expected behavior:
Nuke should remain stable and process the viewer without crashing.

Actual behavior:
Nuke crashes when viewing a cropped Cornerpin node attached with a VectorBlur node with specific channel settings.