Use std::alloc::alloc

examples/free_by_gc/src/main.rs

@@ -1,7 +1,7 @@
 extern crate bdwgc_alloc;
 
 use bdwgc_alloc::Allocator;
-use std::alloc::{GlobalAlloc, Layout};
+use std::alloc::Layout;
 
 #[global_allocator]
 static GLOBAL_ALLOCATOR: Allocator = Allocator;
@@ -10,6 +10,6 @@ fn main() {
     unsafe { Allocator::initialize() }
 
     loop {
-        unsafe { GLOBAL_ALLOCATOR.alloc(Layout::from_size_align(2 ^ 8, 8).unwrap()) };
+        unsafe { std::alloc::alloc(Layout::from_size_align(2 ^ 8, 8).unwrap()) };
     }
 }