w3c/web-platform-tests/2dcontext/drawing-images-to-the-canvas/2d.drawImage.broken.html fails on Mac and iOS

[Chris Lord]

This test fails on both MacOS and iOS with:

FAIL Canvas test: 2d.drawImage.broken assert_approx_equals: Green channel of the pixel at (50, 25) expected 255 +/- 2 but got 0

[Karl Dubost]

The test should throw, but it doesn't currently.

Firefox returns
 Uncaught DOMException: CanvasRenderingContext2D.drawImage: Passed-in image is "broken"


while Safari is completely silent and seems to just go with it. 

Probably something to explore around
https://searchfox.org/wubkat/rev/12fc92585a259a29b2522e7e902492be45a57b6a/Source/WebCore/html/canvas/CanvasRenderingContext2DBase.cpp#1468-1492

[Karl Dubost]

In addition to 
https://wpt.fyi/results/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.broken.html

Probably this failure is very similar and could be fixed at the same time.
https://wpt.fyi/results/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nonexistent.html

[Radar WebKit Bug Importer]

<rdar://problem/122586368>

[Karl Dubost]

This now PASS.
https://wpt.fyi/results/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.broken.html?label=experimental&label=master&aligned

But this one needs to be fixed. Probably in a separate bug. 
https://wpt.fyi/results/html/canvas/element/drawing-images-to-the-canvas/2d.drawImage.nonexistent.html