diff --git a/components/layout/flow.rs b/components/layout/flow.rs
index 2476e2431da..36b8da6cc48 100644
--- a/components/layout/flow.rs
+++ b/components/layout/flow.rs
@@ -1405,7 +1405,8 @@ impl<'a> ImmutableFlowUtils for &'a Flow {
return kid.as_inline().baseline_offset_of_last_line()
}
if kid.is_block_like() &&
- kid.as_block().formatting_context_type() == FormattingContextType::None {
+ kid.as_block().formatting_context_type() == FormattingContextType::None &&
+ !base(kid).flags.contains(IS_ABSOLUTELY_POSITIONED) {
if let Some(baseline_offset) = kid.baseline_offset_of_last_line_box_in_flow() {
return Some(base(kid).position.start.b + baseline_offset)
}
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index debeee40193..9f56db24baa 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -2484,6 +2484,18 @@
"url": "/_mozilla/css/inline_block_border_intrinsic_size_a.html"
}
],
+ "css/inline_block_height_with_out_of_flow_child_a.html": [
+ {
+ "path": "css/inline_block_height_with_out_of_flow_child_a.html",
+ "references": [
+ [
+ "/_mozilla/css/inline_block_height_with_out_of_flow_child_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/inline_block_height_with_out_of_flow_child_a.html"
+ }
+ ],
"css/inline_block_img_a.html": [
{
"path": "css/inline_block_img_a.html",
@@ -11908,6 +11920,18 @@
"url": "/_mozilla/css/inline_block_border_intrinsic_size_a.html"
}
],
+ "css/inline_block_height_with_out_of_flow_child_a.html": [
+ {
+ "path": "css/inline_block_height_with_out_of_flow_child_a.html",
+ "references": [
+ [
+ "/_mozilla/css/inline_block_height_with_out_of_flow_child_ref.html",
+ "=="
+ ]
+ ],
+ "url": "/_mozilla/css/inline_block_height_with_out_of_flow_child_a.html"
+ }
+ ],
"css/inline_block_img_a.html": [
{
"path": "css/inline_block_img_a.html",
diff --git a/tests/wpt/mozilla/tests/css/inline_block_height_with_out_of_flow_child_a.html b/tests/wpt/mozilla/tests/css/inline_block_height_with_out_of_flow_child_a.html
new file mode 100644
index 00000000000..5aab3a8d04d
--- /dev/null
+++ b/tests/wpt/mozilla/tests/css/inline_block_height_with_out_of_flow_child_a.html
@@ -0,0 +1,35 @@
+
+
+
+
+
+
+
+
+
+
+
diff --git a/tests/wpt/mozilla/tests/css/inline_block_height_with_out_of_flow_child_ref.html b/tests/wpt/mozilla/tests/css/inline_block_height_with_out_of_flow_child_ref.html
new file mode 100644
index 00000000000..64603f8c979
--- /dev/null
+++ b/tests/wpt/mozilla/tests/css/inline_block_height_with_out_of_flow_child_ref.html
@@ -0,0 +1,34 @@
+
+
+
+
+
+
+
+
+
+
+