Fix for nightly 2018-07-10 (#296)

* Use [alloc_error_handler] instead of oom lang item

* Same fix for basic_add

* Drive by fix for duplicate generic parameter

* Rebuild binaries.

polkadot/parachain/test-chains/basic_add/src/lib.rs

@@ -17,7 +17,13 @@
 //! Basic parachain that adds a number as part of its state.
 
 #![cfg_attr(not(feature = "std"), no_std)]
-#![cfg_attr(not(feature = "std"), feature(alloc, core_intrinsics, lang_items, panic_implementation, core_panic_info))]
+#![cfg_attr(
+	not(feature = "std"),
+	feature(
+		alloc, core_intrinsics, lang_items, panic_implementation, core_panic_info,
+		alloc_error_handler
+	)
+)]
 
 #[cfg(not(feature = "std"))]
 extern crate alloc;

polkadot/parachain/test-chains/basic_add/src/wasm.rs

@@ -16,7 +16,7 @@
 
 //! Defines WASM module logic.
 
-use core::{intrinsics, panic};
+use core::{intrinsics, panic, alloc};
 use parachain::{self, ValidationResult};
 use parachain::codec::Slicable;
 use super::{HeadData, BlockData};
@@ -29,9 +29,9 @@ pub fn panic(_info: &panic::PanicInfo) -> ! {
 	}
 }
 
-#[lang = "oom"]
+#[alloc_error_handler]
 #[no_mangle]
-pub fn oom() -> ! {
+pub fn oom(_: alloc::Layout) -> ! {
 	unsafe {
 		intrinsics::abort();
 	}