get rid of libc_heap::{malloc_raw, realloc_raw}

The C standard library functions should be used directly. The quirky
NULL / zero-size allocation workaround is no longer necessary and was
adding an extra branch to the allocator code path in a build without
jemalloc. This is a small step towards liballoc being compatible with
handling OOM errors instead of aborting (#18292).

[breaking-change]

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/rt/mod.rs b/src/libstd/rt/mod.rs
index 689bcdad131..a91c6c572e6 100644
--- a/src/libstd/rt/mod.rs
+++ b/src/libstd/rt/mod.rs
@@ -62,7 +62,7 @@ pub use self::util::{default_sched_threads, min_stack, running_on_valgrind};
 
 // Reexport functionality from librustrt and other crates underneath the
 // standard library which work together to create the entire runtime.
-pub use alloc::{heap, libc_heap};
+pub use alloc::heap;
 pub use rustrt::{task, local, mutex, exclusive, stack, args, rtio, thread};
 pub use rustrt::{Stdio, Stdout, Stderr, begin_unwind, begin_unwind_fmt};
 pub use rustrt::{bookkeeping, at_exit, unwind, DEFAULT_ERROR_CODE, Runtime};