Fix border-radius not being set on 2 corners of vertical btn group #16684
it doesn't impact the standard view until you make modifications to the less variables that manage corners. For example, I change the following in "variables.less" file in bootstrap 3.3.4 ( note - this is prior to the addition of btn-border-radius-base, but the problem exists for that case as well ) :
-@border-radius-base: 4px;
-@border-radius-large: 6px;
-@border-radius-small: 3px;
- @border-radius-base: 4px;
- @border-radius-large: 6px;
- @border-radius-small: 10px; // my change
this creates a "gumby" kind of look where the border curves are asymmetric..
Ah, I didn't experience it when I changed them via the Customizer with modified variables and built a local demo that used the vertical button group. Fundamentally I agree with you @sdwarwick, I just didn't experience that behavior (which I was expecting to). I made the PR because I don't know why mine didn't do that and as such I don't trust what mine built even though it checked out in regards to values of the resulting CSS
@kkirsche I've commented in the main part of this thread that it looks like it is better just to have no reference to a specific radius, other than setting the zeros. I am not a regular patch contributor, and was wondering if you might update your submission to reflect that concept.
Where do we stand with this PR? I don't recall seeing any example demos pointing out the problem, and it seems we need to revisit how we remove the rounded corners as opposed to resetting them?
That would seem to be the case @mdo. I haven't been able to replicate the problem though I understand it theoretically should exists the image above would show. It seems to be inheriting the two corners.

While this is correct that it was not being set, I did not notice any visible difference in Chrome on OS X when it is not set.
Fixes #16683