diff --git a/servo/components/plugins/lints/unrooted_must_root.rs b/servo/components/plugins/lints/unrooted_must_root.rs
index 06a227f278592..8fb6178d554bc 100644
--- a/servo/components/plugins/lints/unrooted_must_root.rs
+++ b/servo/components/plugins/lints/unrooted_must_root.rs
@@ -1215,7 +1215,7 @@ tcx
 hir
 :
 :
-Expr
+Body
 span
 :
 codemap
@@ -1389,8 +1389,6 @@ span_lint
 UNROOTED_MUST_ROOT
 arg
 .
-ty
-.
 span
 "
 Type
@@ -1463,7 +1461,10 @@ walk_expr
 &
 mut
 visitor
+&
 body
+.
+value
 )
 ;
 }
@@ -2002,7 +2003,7 @@ body
 hir
 :
 :
-ExprId
+BodyId
 span
 :
 codemap
diff --git a/servo/components/plugins/utils.rs b/servo/components/plugins/utils.rs
index c53bf285a5bf8..13ccbcc3003cf 100644
--- a/servo/components/plugins/utils.rs
+++ b/servo/components/plugins/utils.rs
@@ -376,6 +376,23 @@ PathSegment
 {
 parameters
 :
+Some
+(
+ref
+params
+)
+.
+.
+}
+)
+=
+>
+{
+match
+*
+*
+params
+{
 ast
 :
 :
@@ -387,13 +404,8 @@ AngleBracketed
 ref
 a
 )
-.
-.
-}
-)
 =
 >
-{
 Some
 (
 &
@@ -401,8 +413,55 @@ a
 .
 types
 )
-}
+/
+/
+Foo
+(
+A
+B
+)
+-
+>
+C
+ast
+:
+:
+PathParameters
+:
+:
+Parenthesized
+(
 _
+)
+=
+>
+None
+}
+}
+Some
+(
+&
+ast
+:
+:
+PathSegment
+{
+parameters
+:
+None
+.
+.
+}
+)
+=
+>
+Some
+(
+&
+[
+]
+)
+None
 =
 >
 None
diff --git a/servo/rust-nightly-date b/servo/rust-nightly-date
index e378458574889..9e1d7c8f6db4c 100644
--- a/servo/rust-nightly-date
+++ b/servo/rust-nightly-date
@@ -2,4 +2,4 @@
 -
 12
 -
-19
+29