Auto merge of #51 - servo:rustup, r=jdm

Upgrade to rustc 1.8.0-nightly (0ef8d4260 2016-02-24)

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.svg" height="40" alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/heapsize/51)
<!-- Reviewable:end -->

Author: bors-servo

plugin/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "heapsize_plugin"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["The Servo Project Developers"]
 description = "Automatically generating infrastructure for measuring the total runtime size of an object on the heap"
 license = "MPL-2.0"

plugin/src/heap_size.rs

@@ -49,7 +49,7 @@ pub fn expand_heap_size(cx: &mut ExtCtxt, span: Span, mitem: &MetaItem,
 /// Defines how the implementation for `heap_size_of_children()` is to be generated.
 fn heap_size_substructure(cx: &mut ExtCtxt, trait_span: Span, substr: &Substructure) -> P<Expr> {
     let fields = match *substr.fields {
-        Struct(ref fs) | EnumMatching(_, _, ref fs) => fs,
+        Struct(_, ref fs) | EnumMatching(_, _, ref fs) => fs,
         _ => cx.span_bug(trait_span, "impossible substructure in `#[derive(HeapSizeOf)]`")
     };