Update to nightly-2018-03-07

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "core_io"
-version = "0.1.20170615"
+version = "0.1.20180307"
 authors = ["The Rust Project Developers", "Jethro Beekman"]
 license = "MIT/Apache-2.0"
 description = """

build.rs

@@ -49,6 +49,14 @@ fn main() {
 		}
 	};
 
+	if ver.commit_date.as_ref().map_or(false,|d| &**d>="2018-01-01") {
+		println!("cargo:rustc-cfg=core_memchr");
+	}
+
+	if ver.commit_date.as_ref().map_or(false,|d| &**d>="2017-06-15") {
+		println!("cargo:rustc-cfg=no_collections");
+	}
+
 	if ver.commit_date.as_ref().map_or(false,|d| &**d<"2016-12-15") {
 		println!("cargo:rustc-cfg=rustc_unicode");
 	} else if ver.commit_date.as_ref().map_or(false,|d| &**d<"2017-03-03") {

functions.sh

@@ -41,7 +41,9 @@ get_patch_commits() {
 prepare_version() {
 	mkdir src/$IO_COMMIT
 	git_extract src/libstd/io/
-	if git_file_exists src/libstd/sys_common/memchr.rs; then
+	if git_file_exists src/libcore/slice/memchr.rs; then
+		true
+	elif git_file_exists src/libstd/sys_common/memchr.rs; then
 		git_extract src/libstd/sys_common/memchr.rs
 	elif git_file_exists src/libstd/sys/common/memchr.rs; then
 		git_extract src/libstd/sys/common/memchr.rs

mapping.rs

@@ -333,3 +333,259 @@
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src/lib.rs

@@ -3,11 +3,15 @@
 //! the [std documentation](https://doc.rust-lang.org/nightly/std/io/index.html)
 //! for a full description of the functionality.
 #![allow(stable_features,unused_features)]
-#![feature(question_mark,const_fn,collections,alloc,unicode,copy_from_slice,str_char,try_from,str_internals)]
+#![feature(question_mark,const_fn,collections,alloc,unicode,copy_from_slice,
+	str_char,try_from,str_internals,align_offset,doc_spotlight,slice_internals)]
 #![no_std]
 
 #[cfg_attr(feature="collections",macro_use)]
-#[cfg(feature="collections")] extern crate collections;
+#[cfg(all(feature="collections",not(no_collections)))] extern crate collections;
+#[cfg_attr(feature="collections",allow(unused_imports))]
+#[cfg_attr(feature="collections",macro_use)]
+#[cfg(all(feature="collections",no_collections))] extern crate alloc as collections;
 #[cfg(feature="alloc")] extern crate alloc;
 #[cfg(rustc_unicode)]
 extern crate rustc_unicode;