diff --git a/components/layout/floats.rs b/components/layout/floats.rs
index 087b0bb6d6c..055d883e28c 100644
--- a/components/layout/floats.rs
+++ b/components/layout/floats.rs
@@ -163,9 +163,7 @@ impl Floats {
 
     /// Adjusts the recorded offset of the flow relative to the first float.
     pub fn translate(&mut self, delta: LogicalSize<Au>) {
-        // TODO(servo#30577) revert once underlying bug is fixed
-        // self.offset = self.offset + delta
-        self.offset = self.offset.add_or_warn(delta)
+        self.offset = self.offset + delta
     }
 
     /// Returns the position of the last float in flow coordinates.
diff --git a/components/layout/fragment.rs b/components/layout/fragment.rs
index 967bdfb1df3..d206f8b6bdf 100644
--- a/components/layout/fragment.rs
+++ b/components/layout/fragment.rs
@@ -1505,9 +1505,7 @@ impl Fragment {
         if let Some(ref inline_fragment_context) = self.inline_context {
             for node in &inline_fragment_context.nodes {
                 if node.style.get_box().position == Position::Relative {
-                    // TODO(servo#30577) revert once underlying bug is fixed
-                    // rel_pos = rel_pos + from_style(&*node.style, containing_block_size);
-                    rel_pos = rel_pos.add_or_warn(from_style(&node.style, containing_block_size));
+                    rel_pos = rel_pos + from_style(&*node.style, containing_block_size);
                 }
             }
         }
diff --git a/components/layout/inline.rs b/components/layout/inline.rs
index e6da98ccee8..03e5fc8b01f 100644
--- a/components/layout/inline.rs
+++ b/components/layout/inline.rs
@@ -1771,10 +1771,7 @@ impl Flow for InlineFlow {
                         first_fragment.style.logical_border_width())
                     .start;
                     containing_block_positions.push(
-                        // TODO(servo#30577) revert once underlying bug is fixed
-                        // padding_box_origin.to_physical(self.base.writing_mode, container_size),
-                        padding_box_origin
-                            .to_physical_or_warn(self.base.writing_mode, container_size),
+                        padding_box_origin.to_physical(self.base.writing_mode, container_size),
                     );
                 },
                 SpecificFragmentInfo::InlineBlock(_) if fragment.is_positioned() => {
diff --git a/tests/wpt/meta-legacy-layout/css/css-logical/logical-values-float-clear-3.html.ini b/tests/wpt/meta-legacy-layout/css/css-logical/logical-values-float-clear-3.html.ini
index df83a444327..23e36afc0ad 100644
--- a/tests/wpt/meta-legacy-layout/css/css-logical/logical-values-float-clear-3.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-logical/logical-values-float-clear-3.html.ini
@@ -1,2 +1,2 @@
 [logical-values-float-clear-3.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-logical/logical-values-float-clear-4.html.ini b/tests/wpt/meta-legacy-layout/css/css-logical/logical-values-float-clear-4.html.ini
index 98c3b5a751d..666c8aefcd8 100644
--- a/tests/wpt/meta-legacy-layout/css/css-logical/logical-values-float-clear-4.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-logical/logical-values-float-clear-4.html.ini
@@ -1,2 +1,2 @@
 [logical-values-float-clear-4.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vlr-ltr-rtl-in-multicol.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vlr-ltr-rtl-in-multicol.tentative.html.ini
index 8c7b3d749c7..cd6cb306df5 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vlr-ltr-rtl-in-multicol.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vlr-ltr-rtl-in-multicol.tentative.html.ini
@@ -1,2 +1,2 @@
 [vlr-ltr-rtl-in-multicol.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vlr-rtl-ltr-in-multicol.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vlr-rtl-ltr-in-multicol.tentative.html.ini
index 61c90231b83..3061eace4be 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vlr-rtl-ltr-in-multicol.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vlr-rtl-ltr-in-multicol.tentative.html.ini
@@ -1,2 +1,2 @@
 [vlr-rtl-ltr-in-multicol.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vrl-ltr-rtl-in-multicol.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vrl-ltr-rtl-in-multicol.tentative.html.ini
index e1b2211afbf..afc77e186af 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vrl-ltr-rtl-in-multicol.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vrl-ltr-rtl-in-multicol.tentative.html.ini
@@ -1,2 +1,2 @@
 [vrl-ltr-rtl-in-multicol.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vrl-rtl-ltr-in-multicol.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vrl-rtl-ltr-in-multicol.tentative.html.ini
index f169e087308..f563d39faab 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vrl-rtl-ltr-in-multicol.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/multicol/static-position/vrl-rtl-ltr-in-multicol.tentative.html.ini
@@ -1,2 +1,2 @@
 [vrl-rtl-ltr-in-multicol.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/multicol/vlr-ltr-rtl-in-multicols.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/multicol/vlr-ltr-rtl-in-multicols.tentative.html.ini
index ce0ecaec7a5..478043e9261 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/multicol/vlr-ltr-rtl-in-multicols.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/multicol/vlr-ltr-rtl-in-multicols.tentative.html.ini
@@ -1,2 +1,2 @@
 [vlr-ltr-rtl-in-multicols.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/multicol/vlr-rtl-ltr-in-multicols.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/multicol/vlr-rtl-ltr-in-multicols.tentative.html.ini
index c14c2b0a8d4..25d2e8c0dde 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/multicol/vlr-rtl-ltr-in-multicols.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/multicol/vlr-rtl-ltr-in-multicols.tentative.html.ini
@@ -1,2 +1,2 @@
 [vlr-rtl-ltr-in-multicols.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/multicol/vrl-ltr-rtl-in-multicols.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/multicol/vrl-ltr-rtl-in-multicols.tentative.html.ini
index 682714ecdbd..a2a359ae899 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/multicol/vrl-ltr-rtl-in-multicols.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/multicol/vrl-ltr-rtl-in-multicols.tentative.html.ini
@@ -1,2 +1,2 @@
 [vrl-ltr-rtl-in-multicols.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/multicol/vrl-rtl-ltr-in-multicols.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/multicol/vrl-rtl-ltr-in-multicols.tentative.html.ini
index af968a4c833..b5b10e84b2e 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/multicol/vrl-rtl-ltr-in-multicols.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/multicol/vrl-rtl-ltr-in-multicols.tentative.html.ini
@@ -1,2 +1,2 @@
 [vrl-rtl-ltr-in-multicols.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/static-position/htb-ltr-rtl.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/static-position/htb-ltr-rtl.tentative.html.ini
index 817a9fedbf0..bf6a7eedfbb 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/static-position/htb-ltr-rtl.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/static-position/htb-ltr-rtl.tentative.html.ini
@@ -1,2 +1,2 @@
 [htb-ltr-rtl.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/static-position/htb-rtl-ltr.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/static-position/htb-rtl-ltr.tentative.html.ini
index 94b7f1620c1..1e7972e49b3 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/static-position/htb-rtl-ltr.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/static-position/htb-rtl-ltr.tentative.html.ini
@@ -1,2 +1,2 @@
 [htb-rtl-ltr.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/static-position/vlr-ltr-rtl.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/static-position/vlr-ltr-rtl.tentative.html.ini
index 90ef1e4ddec..9566e7ad6a7 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/static-position/vlr-ltr-rtl.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/static-position/vlr-ltr-rtl.tentative.html.ini
@@ -1,2 +1,2 @@
 [vlr-ltr-rtl.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/static-position/vlr-rtl-ltr.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/static-position/vlr-rtl-ltr.tentative.html.ini
index 84a86713f1f..22bfeb8265d 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/static-position/vlr-rtl-ltr.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/static-position/vlr-rtl-ltr.tentative.html.ini
@@ -1,2 +1,2 @@
 [vlr-rtl-ltr.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/static-position/vrl-ltr-rtl.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/static-position/vrl-ltr-rtl.tentative.html.ini
index 494a2d6c35c..7758234991b 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/static-position/vrl-ltr-rtl.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/static-position/vrl-ltr-rtl.tentative.html.ini
@@ -1,2 +1,2 @@
 [vrl-ltr-rtl.tentative.html]
-  expected: FAIL
+  expected: CRASH
diff --git a/tests/wpt/meta-legacy-layout/css/css-position/static-position/vrl-rtl-ltr.tentative.html.ini b/tests/wpt/meta-legacy-layout/css/css-position/static-position/vrl-rtl-ltr.tentative.html.ini
index 17f6081dca2..7a3ddb8bf54 100644
--- a/tests/wpt/meta-legacy-layout/css/css-position/static-position/vrl-rtl-ltr.tentative.html.ini
+++ b/tests/wpt/meta-legacy-layout/css/css-position/static-position/vrl-rtl-ltr.tentative.html.ini
@@ -1,2 +1,2 @@
 [vrl-rtl-ltr.tentative.html]
-  expected: FAIL
+  expected: CRASH