servo: Merge #14689 - Update to rustc 1.16.0-nightly (4ecc85beb 2016-12-28) (from servo:rustup); r=Manishearth

<s>**This is not ready to land** since there is no corresponding Nightly build of Rust yet.</s> Update: we got a Nightly build on 2016-12-29: http://rusty-dash.com/nightlies

I made these changes to check that rust-lang/rust#38566 fixes rust-lang/rust#38535 (which it does, yay!) so I might as well publish them, we’ll need them soon enough.

---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [ ] These changes fix #__ (github issue number if applicable).

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- [ ] There are tests for these changes OR
- [ ] These changes do not require tests because _____

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Source-Repo: https://github.com/servo/servo
Source-Revision: 9bdd0f401a89398fb2ecd4f6b54691a7c93b2e53

UltraBlame original commit: 17e25ccaa7dfe2f7c7d88878a1fb5ce5f1888914

Author: marco-c

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

servo/components/plugins/utils.rs

@@ -376,6 +376,23 @@ PathSegment
 {
 parameters
 :
+Some
+(
+ref
+params
+)
+.
+.
+}
+)
+=
+>
+{
+match
+*
+*
+params
+{
 ast
 :
 :
@@ -387,22 +404,64 @@ AngleBracketed
 ref
 a
 )
-.
-.
-}
-)
 =
 >
-{
 Some
 (
 &
 a
 .
 types
 )
-}
+/
+/
+Foo
+(
+A
+B
+)
+-
+>
+C
+ast
+:
+:
+PathParameters
+:
+:
+Parenthesized
+(
 _
+)
+=
+>
+None
+}
+}
+Some
+(
+&
+ast
+:
+:
+PathSegment
+{
+parameters
+:
+None
+.
+.
+}
+)
+=
+>
+Some
+(
+&
+[
+]
+)
+None
 =
 >
 None

servo/rust-nightly-date

@@ -2,4 +2,4 @@
 -
 12
 -
-19
+29