Upgrade to rustc 1.36.0-nightly (e305df184 2019-04-24)

This includes a `size_of` regression for a few DOM types,
due to rust-lang/rust#58623 which replaces the
implementation of `HashMap` in the standard library to Hashbrown.

Although `size_of<HashMap>` grows, it’s not obvious how total memory usage
is going to be impacted: Hashbrown only has one `u8` instead of one `usize`
of overhead per hash table bucket for storing (part of) a hash,
and so might allocate less memory itself.

Hashbrown also typically has better run time performance:
https://github.com/rust-lang/hashbrown#performance

Still, I’ve filed rust-lang/hashbrown#69
about potentially reducing the `size_of<HashMap>` regression.

components/style_derive/animate.rs

@@ -25,7 +25,7 @@ pub fn derive(mut input: DeriveInput) -> TokenStream {
         let s = Structure::new(&input);
         let mut append_error_clause = s.variants().len() > 1;
 
-        let mut match_body = s.variants().iter().fold(quote!(), |body, variant| {
+        let match_body = s.variants().iter().fold(quote!(), |body, variant| {
             let arm = match derive_variant_arm(variant, &mut where_clause) {
                 Ok(arm) => arm,
                 Err(()) => {

rust-toolchain

@@ -1 +1 @@
-nightly-2019-04-18
+nightly-2019-04-25

tests/unit/script/size_of.rs

@@ -29,11 +29,11 @@ macro_rules! sizeof_checker (
 );
 
 // Update the sizes here
-sizeof_checker!(size_event_target, EventTarget, 40);
-sizeof_checker!(size_node, Node, 184);
-sizeof_checker!(size_element, Element, 432);
-sizeof_checker!(size_htmlelement, HTMLElement, 448);
-sizeof_checker!(size_div, HTMLDivElement, 448);
-sizeof_checker!(size_span, HTMLSpanElement, 448);
-sizeof_checker!(size_text, Text, 216);
-sizeof_checker!(size_characterdata, CharacterData, 216);
+sizeof_checker!(size_event_target, EventTarget, 56);
+sizeof_checker!(size_node, Node, 200);
+sizeof_checker!(size_element, Element, 448);
+sizeof_checker!(size_htmlelement, HTMLElement, 464);
+sizeof_checker!(size_div, HTMLDivElement, 464);
+sizeof_checker!(size_span, HTMLSpanElement, 464);
+sizeof_checker!(size_text, Text, 232);
+sizeof_checker!(size_characterdata, CharacterData, 232);