[css-flexbox-1][css-grid-1][css-grid-2] Check computed overflow instead of scroll container-ness #7714

Author: fantasai

css-flexbox-1/Overview.bs

@@ -955,7 +955,7 @@ Automatic Minimum Size of Flex Items
 
 	To provide a more reasonable default minimum size for flex items,
 	the used value of a main axis automatic minimum size
-	on a flex item that is not a scroll container
+	on a flex item whose [=computed value|computed=] 'overflow' value is [=non-scrollable overflow value|non-scrollable=]
 	is its [=content-based minimum size=];
 	for scroll containers the automatic minimum size is zero, as usual.
 

css-grid-1/Overview.bs

@@ -1283,7 +1283,7 @@ Automatic Minimum Size of Grid Items
 	the used value of its automatic minimum size in a given axis
 	is the content-based minimum size if all of the following are true:
 
-	* it is not a [=scroll container=]
+	* its [=computed value|computed=] 'overflow' is not a [=scrollable overflow value=]
 	* it spans at least one [=track=] in that axis
 		whose min track sizing function is ''grid-template-rows/auto''
 	* if it spans more than one track in that axis, none of those tracks are [=flexible track|flexible=]
@@ -5375,6 +5375,14 @@ Minor Changes
 			
 			layout-algorithm/grid-intrinsic-track-sizes-001.html
 			
+
+		
+			Pin [=automatic minimum size=] conditional on [=computed value=] of 'overflow'
+			rather than on being a [=scroll container=]
+			to avoid cases such as [=replaced elements=]
+			whose computed [=scrollable overflow values=] resolve to
+			[=non-scrollable overflow values|non-scrollable=] [=used values=].
+			(7714)
 	
 
 

css-grid-2/Overview.bs

@@ -1342,7 +1342,7 @@ Automatic Minimum Size of Grid Items
 	the used value of its automatic minimum size in a given axis
 	is the content-based minimum size if all of the following are true:
 
-	* it is not a [=scroll container=]
+	* its [=computed value|computed=] 'overflow' is not a [=scrollable overflow value=]=]
 	* it spans at least one [=track=] in that axis
 		whose min track sizing function is ''grid-template-rows/auto''
 	* if it spans more than one track in that axis, none of those tracks are [=flexible track|flexible=]
@@ -5528,6 +5528,14 @@ Changes since the 
 			and grid track sizing.
 			See [[#layout-algorithm]].
 			(Issue 3418)
+
+		
+			Pin [=automatic minimum size=] conditional on [=computed value=] of 'overflow'
+			rather than on being a [=scroll container=]
+			to avoid cases such as [=replaced elements=]
+			whose computed [=scrollable overflow values=] resolve to
+			[=non-scrollable overflow values|non-scrollable=] [=used values=].
+			(7714)