1498552 - Bottom padding is not added if last child element is a <fieldset> element

Status: RESOLVED DUPLICATE of bug 748518

(Core :: Layout, defect)

Description

[Rob Wu [:robwu]]

Test case:
<div style="overflow:scroll;padding:50px;height:100px;">
  <fieldset>
    <div style="height:300px">big content</div>
  </fieldset>
</div>

STR:
1. Open the test case:
   data:text/html,<div style="overflow:scroll;padding:50px;height:100px;"><fieldset><div style="height:300px">big content</div></fieldset></div>
2. Scroll down inside the scrollable container and look at the bottom.

Expected result (Chromium 69):
- There is some padding at the bottom (gap between bottom of fieldset and bottom of the scrollable container).

Actual result (Firefox 62.0.3 and Firefox Nightly 64 (buildID 20181007220217)):
- There is no padding at the bottom (gap between the bottom of the fieldset and bottom of scrollable container is not present).

Comment 1

[Emilio Cobos Álvarez (:emilio)]

Not related to fieldset at all as far I can see. See all the discussion in bug 748518.

Comment 2

[Rob Wu [:robwu]]

Ah you're right. The fieldset only made the issue more obvious.
This test case shows that normal divs are also affected:

data:text/html,<div style="overflow:scroll;padding:50px;height:100px;"><div style="border:1px solid red"><div style="height:300px">big content</div></div></div>