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Fix ordering issue within NGBlockLayoutAlgorithm::ComputeMinMaxSizes #22705

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merged 1 commit into from Apr 7, 2020

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@chromium-wpt-export-bot chromium-wpt-export-bot commented Apr 5, 2020

The DCHECK in the bug was caused by an order-of-operations issue.
Within the following calculation:
max_inline_contribution =
child_sizes.max_size + line_left_inset + line_right_inset;

If:
child_sizes.max_size == LayoutUnit::Max()
line_left_inset == LayoutUnit(1)
line_right_inset == LayoutUnit(-1)

max_inline_contribution would be LayoutUnit::Max() - LayoutUnit(1);

This resulted in max_size < min_size.

Bug: 1004060
Change-Id: I3e439500f07a2cd1cf0cbe5528ece16090c9fa70
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2136885
Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#757094}

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The review process for this patch is being conducted in the Chromium project.

The DCHECK in the bug was caused by an order-of-operations issue.
Within the following calculation:
max_inline_contribution =
          child_sizes.max_size + line_left_inset + line_right_inset;

If:
child_sizes.max_size == LayoutUnit::Max()
line_left_inset == LayoutUnit(1)
line_right_inset == LayoutUnit(-1)

max_inline_contribution would be LayoutUnit::Max() - LayoutUnit(1);

This resulted in max_size < min_size.

Bug: 1004060
Change-Id: I3e439500f07a2cd1cf0cbe5528ece16090c9fa70
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2136885
Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#757094}
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3 participants