Gaps between items in Column and ListView

[mehmetf]

b/158072646

There are small gaps between consecutive items in Column / ListView / CustomScrollView.
When draw a black background behind a list / column of red tiles, there are some black gaps between items in the list / column. It is expected that the list should be all red with no gaps in between.

On mobile, the gaps are always visible. Happens on debug, profile and release build.
On dartpad.dev/flutter, the gaps are only visible at some scrollOffset.

Example code: https://dartpad.dev/5239567d3d7c2a0da8fb1dc1fdb5eb83
Attached screenshots are taken on dartpad and on Pixel 1.

[HansMuller]

This looks like a known problem with antialiasing and mapping from logical pixels to device pixels. There's an open issue for a documentation fix: #14288

More info about the problem can be found here:
#14288 (comment)
#17084 (comment)
#15035 (comment)

[mehmetf]

This is great context. Thanks Hans.

[github-actions]

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