Alloc/Collections got merged

build.rs

@@ -55,6 +55,10 @@ fn main() {
 		println!("cargo:rustc-cfg=std_unicode");
 	}
 
+	if ver.commit_date.as_ref().map_or(false,|d| &**d>"2017-06-15") {
+		println!("cargo:rustc-cfg=collections_in_alloc");
+	}
+
 	let mut dest_path=PathBuf::from(env::var_os("OUT_DIR").unwrap());
 	dest_path.push("io.rs");
 	let mut f=File::create(&dest_path).unwrap();

patches/cb56b2d1522e83c5bb0613abcf78b686e994df9e.patch

@@ -969,7 +969,7 @@ diff --git a/mod.rs b/mod.rs
 index d403bf6..50bbc9d 100644
 --- a/mod.rs
 +++ b/mod.rs
-@@ -268,50 +268,33 @@
+@@ -268,50 +268,35 @@
  //! [`Result`]: ../result/enum.Result.html
  //! [`.unwrap()`]: ../result/enum.Result.html#method.unwrap
  
@@ -1012,6 +1012,8 @@ index d403bf6..50bbc9d 100644
 -#[unstable(feature = "libstd_io_internals", issue = "42788")]
 -#[doc(no_inline, hidden)]
 -pub use self::stdio::{set_panic, set_print};
++#[cfg(feature="collections")] use collections::string::String;
++#[cfg(feature="collections")] use collections::vec::Vec;
  
  pub mod prelude;
 -mod buffered;

src/lib.rs

@@ -6,9 +6,16 @@
 #![feature(question_mark,const_fn,collections,alloc,unicode,copy_from_slice,str_char,try_from,str_internals,slice_internals)]
 #![no_std]
 
-#[cfg_attr(feature="collections",macro_use)]
+#[cfg_attr(all(feature="collections", not(collections_in_alloc)), macro_use)]
-#[cfg(feature="collections")] extern crate collections;
+#[cfg(all(feature="collections", not(collections_in_alloc)))] extern crate collections;
-#[cfg(feature="alloc")] extern crate alloc;
+
+#[cfg_attr(all(feature="collections", collections_in_alloc), macro_use)]
+#[cfg(any(all(feature="collections", collections_in_alloc), feature="alloc"))]
+extern crate alloc;
+
+#[cfg(all(feature="collections", collections_in_alloc))]
+use alloc as collections;
+
 #[cfg(rustc_unicode)]
 extern crate rustc_unicode;
 #[cfg(std_unicode)]