diff --git a/Cargo.lock b/Cargo.lock
index b6601d5b0c74..03807f8f3c6f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -7351,9 +7351,9 @@ dependencies = [
 
 [[package]]
 name = "simd-json"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e3375b6c3d8c048ba09c8b4b6c3f1d3f35e06b71db07d231c323943a949e1b8"
+checksum = "1663db38e6e50038d4de020667c364490d43473ad6d073822a6af6576fc343a5"
 dependencies = [
  "halfbrown",
  "lexical-core",
diff --git a/ci/build-ci-image.sh b/ci/build-ci-image.sh
index cd902572982d..43bc4cc7a22e 100755
--- a/ci/build-ci-image.sh
+++ b/ci/build-ci-image.sh
@@ -14,7 +14,7 @@ export RUST_TOOLCHAIN=$(cat ../rust-toolchain)
 # !!! CHANGE THIS WHEN YOU WANT TO BUMP CI IMAGE !!! #
 #          AND ALSO docker-compose.yml               #
 ######################################################
-export BUILD_ENV_VERSION=v20230403
+export BUILD_ENV_VERSION=v20230407
 
 export BUILD_TAG="public.ecr.aws/x5u3w5h6/rw-build-env:${BUILD_ENV_VERSION}"
 
diff --git a/ci/docker-compose.yml b/ci/docker-compose.yml
index f00119091790..2610bb4ab289 100644
--- a/ci/docker-compose.yml
+++ b/ci/docker-compose.yml
@@ -34,7 +34,7 @@ services:
       retries: 5
 
   source-test-env:
-    image: public.ecr.aws/x5u3w5h6/rw-build-env:v20230403
+    image: public.ecr.aws/x5u3w5h6/rw-build-env:v20230407
     depends_on:
       - mysql
       - db
@@ -42,7 +42,7 @@ services:
       - ..:/risingwave
 
   sink-test-env:
-    image: public.ecr.aws/x5u3w5h6/rw-build-env:v20230403
+    image: public.ecr.aws/x5u3w5h6/rw-build-env:v20230407
     depends_on:
       - mysql
       - db
@@ -50,12 +50,12 @@ services:
       - ..:/risingwave
 
   rw-build-env:
-    image: public.ecr.aws/x5u3w5h6/rw-build-env:v20230403
+    image: public.ecr.aws/x5u3w5h6/rw-build-env:v20230407
     volumes:
       - ..:/risingwave
 
   regress-test-env:
-    image: public.ecr.aws/x5u3w5h6/rw-build-env:v20230403
+    image: public.ecr.aws/x5u3w5h6/rw-build-env:v20230407
     depends_on:
       db:
         condition: service_healthy
diff --git a/docs/developer-guide.md b/docs/developer-guide.md
index 2d517092682c..3b6483f6b639 100644
--- a/docs/developer-guide.md
+++ b/docs/developer-guide.md
@@ -72,7 +72,7 @@ RiseDev is the development mode of RisingWave. To develop RisingWave, you need t
 * OpenSSL
 * PostgreSQL (psql) (>= 14.1)
 * Tmux (>= v3.2a)
-* LLVM 15 (For macOS only, to workaround some bugs in macOS toolchain. See https://github.com/risingwavelabs/risingwave/issues/6205).
+* LLVM 16 (For macOS only, to workaround some bugs in macOS toolchain. See https://github.com/risingwavelabs/risingwave/issues/6205).
 
 To install the dependencies on macOS, run:
 
diff --git a/rust-toolchain b/rust-toolchain
index b6f2add311f5..ab84e227e661 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1 +1 @@
-nightly-2023-03-01
+nightly-2023-04-07
diff --git a/src/batch/src/executor/mod.rs b/src/batch/src/executor/mod.rs
index 130d451a087b..26392f901b22 100644
--- a/src/batch/src/executor/mod.rs
+++ b/src/batch/src/executor/mod.rs
@@ -237,9 +237,7 @@ mod tests {
 
     #[test]
     fn test_clone_for_plan() {
-        let plan_node = PlanNode {
-            ..Default::default()
-        };
+        let plan_node = PlanNode::default();
         let task_id = &TaskId {
             task_id: 1,
             stage_id: 1,
@@ -251,9 +249,7 @@ mod tests {
             ComputeNodeContext::for_test(),
             to_committed_batch_query_epoch(u64::MAX),
         );
-        let child_plan = &PlanNode {
-            ..Default::default()
-        };
+        let child_plan = &PlanNode::default();
         let cloned_builder = builder.clone_for_plan(child_plan);
         assert_eq!(builder.task_id, cloned_builder.task_id);
     }
diff --git a/src/cmd_all/src/lib.rs b/src/cmd_all/src/lib.rs
index b31ce9f7e57b..60e3bf39d166 100644
--- a/src/cmd_all/src/lib.rs
+++ b/src/cmd_all/src/lib.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 
 pub mod playground;
 pub use playground::*;
diff --git a/src/common/src/lib.rs b/src/common/src/lib.rs
index 762cae756471..141a950af429 100644
--- a/src/common/src/lib.rs
+++ b/src/common/src/lib.rs
@@ -23,7 +23,7 @@
 #![feature(lint_reasons)]
 #![feature(generators)]
 #![feature(map_try_insert)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(error_generic_member_access)]
 #![feature(provide_any)]
 #![feature(let_chains)]
diff --git a/src/connector/Cargo.toml b/src/connector/Cargo.toml
index 8aa77ef2c088..7a485a0ff027 100644
--- a/src/connector/Cargo.toml
+++ b/src/connector/Cargo.toml
@@ -15,18 +15,26 @@ normal = ["workspace-hack"]
 
 [dependencies]
 anyhow = "1"
-apache-avro = { git = "https://github.com/risingwavelabs/avro", branch = "waruto/modify-decimal", features = ["snappy", "zstandard", "bzip", "xz"] }
+apache-avro = { git = "https://github.com/risingwavelabs/avro", branch = "waruto/modify-decimal", features = [
+    "snappy",
+    "zstandard",
+    "bzip",
+    "xz",
+] }
 async-trait = "0.1"
 aws-config = { workspace = true }
 aws-sdk-ec2 = { workspace = true }
-aws-sdk-kinesis = { workspace = true } 
+aws-sdk-kinesis = { workspace = true }
 aws-sdk-s3 = { workspace = true }
 aws-smithy-http = { workspace = true }
 aws-types = { workspace = true }
 bincode = "1"
 byteorder = "1"
 bytes = { version = "1", features = ["serde"] }
-chrono = { version = "0.4", default-features = false, features = ["clock", "std"] }
+chrono = { version = "0.4", default-features = false, features = [
+    "clock",
+    "std",
+] }
 csv = "1.2"
 duration-str = "0.5.0"
 enum-as-inner = "0.5"
@@ -49,8 +57,16 @@ prometheus = { version = "0.13", features = ["process"] }
 prost = { version = "0.11.0", features = ["no-recursion-limit"] }
 prost-reflect = "0.9.2"
 protobuf-native = "0.2.1"
-pulsar = { version = "4.2", default-features = false, features = ["tokio-runtime", "telemetry", "auth-oauth2"] }
-rdkafka = { package = "madsim-rdkafka", version = "=0.2.14-alpha", features = ["cmake-build", "ssl-vendored", "gssapi"] }
+pulsar = { version = "4.2", default-features = false, features = [
+    "tokio-runtime",
+    "telemetry",
+    "auth-oauth2",
+] }
+rdkafka = { package = "madsim-rdkafka", version = "=0.2.14-alpha", features = [
+    "cmake-build",
+    "ssl-vendored",
+    "gssapi",
+] }
 reqwest = { version = "0.11", features = ["json"] }
 risingwave_common = { path = "../common" }
 risingwave_expr = { path = "../expr" }
@@ -61,9 +77,17 @@ serde = { version = "1", features = ["derive", "rc"] }
 serde_derive = "1"
 serde_json = "1"
 serde_with = { version = "2", features = ["json"] }
-simd-json = "0.7"
+simd-json = "0.8"
 thiserror = "1"
-tokio = { version = "0.2", package = "madsim-tokio", features = ["rt", "rt-multi-thread", "sync", "macros", "time", "signal", "fs"] }
+tokio = { version = "0.2", package = "madsim-tokio", features = [
+    "rt",
+    "rt-multi-thread",
+    "sync",
+    "macros",
+    "time",
+    "signal",
+    "fs",
+] }
 tokio-retry = "0.3"
 tokio-stream = "0.1"
 tokio-util = { version = "0.7", features = ["codec", "io"] }
diff --git a/src/connector/src/lib.rs b/src/connector/src/lib.rs
index c5d8bd79df45..0fb5a133b56c 100644
--- a/src/connector/src/lib.rs
+++ b/src/connector/src/lib.rs
@@ -21,7 +21,7 @@
 #![feature(trait_alias)]
 #![feature(binary_heap_drain_sorted)]
 #![feature(lint_reasons)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(result_option_inspect)]
 #![feature(let_chains)]
 #![feature(box_into_inner)]
diff --git a/src/expr/macro/src/gen.rs b/src/expr/macro/src/gen.rs
index 09c4d3ba753c..c03d18f8b94e 100644
--- a/src/expr/macro/src/gen.rs
+++ b/src/expr/macro/src/gen.rs
@@ -115,6 +115,10 @@ impl FunctionAttr {
         let exprs = (0..num_args)
             .map(|i| format_ident!("e{i}"))
             .collect::<Vec<_>>();
+        #[expect(
+            clippy::redundant_clone,
+            reason = "false positive https://github.com/rust-lang/rust-clippy/issues/10545"
+        )]
         let exprs0 = exprs.clone();
 
         let build_expr = if self.ret == "varchar" && self.user_fn.is_writer_style() {
diff --git a/src/expr/macro/src/lib.rs b/src/expr/macro/src/lib.rs
index 9e00e6edb650..aadd822dc5c6 100644
--- a/src/expr/macro/src/lib.rs
+++ b/src/expr/macro/src/lib.rs
@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#![feature(lint_reasons)]
+
 use proc_macro::TokenStream;
 use proc_macro2::TokenStream as TokenStream2;
 use quote::ToTokens;
diff --git a/src/expr/src/lib.rs b/src/expr/src/lib.rs
index d7f964766c84..18a48bd4437f 100644
--- a/src/expr/src/lib.rs
+++ b/src/expr/src/lib.rs
@@ -19,7 +19,7 @@
 #![feature(lint_reasons)]
 #![feature(iterator_try_collect)]
 #![feature(exclusive_range_pattern)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(try_blocks)]
 
 mod error;
diff --git a/src/frontend/src/lib.rs b/src/frontend/src/lib.rs
index bea9a481f19f..3eb65bf62fce 100644
--- a/src/frontend/src/lib.rs
+++ b/src/frontend/src/lib.rs
@@ -25,7 +25,7 @@
 #![feature(assert_matches)]
 #![feature(lint_reasons)]
 #![feature(box_patterns)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(result_option_inspect)]
 #![feature(macro_metavar_expr)]
 #![feature(slice_internals)]
diff --git a/src/frontend/src/optimizer/rule/index_selection_rule.rs b/src/frontend/src/optimizer/rule/index_selection_rule.rs
index 7fa0ae97eea0..d31f2c8b88c5 100644
--- a/src/frontend/src/optimizer/rule/index_selection_rule.rs
+++ b/src/frontend/src/optimizer/rule/index_selection_rule.rs
@@ -103,6 +103,10 @@ impl Rule for IndexSelectionRule {
         );
 
         let mut final_plan: PlanRef = logical_scan.clone().into();
+        #[expect(
+            clippy::redundant_clone,
+            reason = "false positive https://github.com/rust-lang/rust-clippy/issues/10545"
+        )]
         let mut min_cost = primary_cost.clone();
 
         for index in indexes {
diff --git a/src/frontend/src/scheduler/distributed/query.rs b/src/frontend/src/scheduler/distributed/query.rs
index c746e8f76697..14105d5cb5d5 100644
--- a/src/frontend/src/scheduler/distributed/query.rs
+++ b/src/frontend/src/scheduler/distributed/query.rs
@@ -368,9 +368,7 @@ impl QueryRunner {
         let root_stage_result = QueryResultFetcher::new(
             root_task_output_id,
             // Execute in local, so no need to fill meaningful address.
-            HostAddress {
-                ..Default::default()
-            },
+            HostAddress::default(),
             chunk_rx,
             self.query.query_id.clone(),
             self.query_execution_info.clone(),
diff --git a/src/java_binding/src/lib.rs b/src/java_binding/src/lib.rs
index 904ef025a300..de5180ed23ac 100644
--- a/src/java_binding/src/lib.rs
+++ b/src/java_binding/src/lib.rs
@@ -14,7 +14,7 @@
 
 #![feature(error_generic_member_access)]
 #![feature(provide_any)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(type_alias_impl_trait)]
 
 mod hummock_iterator;
diff --git a/src/meta/src/hummock/manager/tests.rs b/src/meta/src/hummock/manager/tests.rs
index 3eaa9731dfa2..6322b366fb8d 100644
--- a/src/meta/src/hummock/manager/tests.rs
+++ b/src/meta/src/hummock/manager/tests.rs
@@ -847,9 +847,7 @@ async fn test_trigger_manual_compaction() {
     {
         let option = ManualCompactionOption {
             level: 6,
-            key_range: KeyRange {
-                ..Default::default()
-            },
+            key_range: KeyRange::default(),
             ..Default::default()
         };
 
diff --git a/src/meta/src/lib.rs b/src/meta/src/lib.rs
index dcc3cc8acc45..2dc8098898fa 100644
--- a/src/meta/src/lib.rs
+++ b/src/meta/src/lib.rs
@@ -15,7 +15,6 @@
 #![allow(clippy::derive_partial_eq_without_eq)]
 #![feature(trait_alias)]
 #![feature(binary_heap_drain_sorted)]
-#![feature(option_result_contains)]
 #![feature(type_alias_impl_trait)]
 #![feature(drain_filter)]
 #![feature(custom_test_frameworks)]
@@ -25,7 +24,7 @@
 #![feature(is_some_and)]
 #![feature(btree_drain_filter)]
 #![feature(result_option_inspect)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(let_chains)]
 #![feature(error_generic_member_access)]
 #![feature(provide_any)]
diff --git a/src/meta/src/rpc/service/hummock_service.rs b/src/meta/src/rpc/service/hummock_service.rs
index ac07cb082f77..f99769dd6f26 100644
--- a/src/meta/src/rpc/service/hummock_service.rs
+++ b/src/meta/src/rpc/service/hummock_service.rs
@@ -299,9 +299,7 @@ where
             }
 
             None => {
-                option.key_range = KeyRange {
-                    ..Default::default()
-                }
+                option.key_range = KeyRange::default();
             }
         }
 
diff --git a/src/meta/src/stream/stream_manager.rs b/src/meta/src/stream/stream_manager.rs
index d82007beba32..50ab93e88018 100644
--- a/src/meta/src/stream/stream_manager.rs
+++ b/src/meta/src/stream/stream_manager.rs
@@ -646,9 +646,7 @@ mod tests {
             &self,
             _request: Request<BarrierCompleteRequest>,
         ) -> std::result::Result<Response<BarrierCompleteResponse>, Status> {
-            Ok(Response::new(BarrierCompleteResponse {
-                ..Default::default()
-            }))
+            Ok(Response::new(BarrierCompleteResponse::default()))
         }
 
         async fn wait_epoch_commit(
diff --git a/src/object_store/src/lib.rs b/src/object_store/src/lib.rs
index 3ecef33bf6cf..4f1233bb627b 100644
--- a/src/object_store/src/lib.rs
+++ b/src/object_store/src/lib.rs
@@ -14,7 +14,7 @@
 
 #![feature(trait_alias)]
 #![feature(type_alias_impl_trait)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(lint_reasons)]
 #![feature(error_generic_member_access)]
 #![feature(provide_any)]
diff --git a/src/sqlparser/tests/sqlparser_common.rs b/src/sqlparser/tests/sqlparser_common.rs
index 9d72accda14a..8ac312e0a28b 100644
--- a/src/sqlparser/tests/sqlparser_common.rs
+++ b/src/sqlparser/tests/sqlparser_common.rs
@@ -1715,9 +1715,7 @@ fn parse_explain_analyze_with_simple_select() {
     run_explain_analyze(
         "EXPLAIN SELECT sqrt(id) FROM foo",
         false,
-        ExplainOptions {
-            ..Default::default()
-        },
+        ExplainOptions::default(),
     );
     run_explain_analyze(
         "EXPLAIN (VERBOSE) SELECT sqrt(id) FROM foo",
@@ -1730,9 +1728,7 @@ fn parse_explain_analyze_with_simple_select() {
     run_explain_analyze(
         "EXPLAIN ANALYZE SELECT sqrt(id) FROM foo",
         true,
-        ExplainOptions {
-            ..Default::default()
-        },
+        ExplainOptions::default(),
     );
     run_explain_analyze(
         "EXPLAIN (TRACE) SELECT sqrt(id) FROM foo",
diff --git a/src/storage/backup/src/lib.rs b/src/storage/backup/src/lib.rs
index ab85d6809521..ab85ea2ef1d7 100644
--- a/src/storage/backup/src/lib.rs
+++ b/src/storage/backup/src/lib.rs
@@ -15,7 +15,6 @@
 #![allow(clippy::derive_partial_eq_without_eq)]
 #![feature(trait_alias)]
 #![feature(binary_heap_drain_sorted)]
-#![feature(option_result_contains)]
 #![feature(type_alias_impl_trait)]
 #![feature(drain_filter)]
 #![feature(custom_test_frameworks)]
@@ -25,7 +24,7 @@
 #![feature(is_some_and)]
 #![feature(btree_drain_filter)]
 #![feature(result_option_inspect)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(let_chains)]
 #![feature(error_generic_member_access)]
 #![feature(provide_any)]
diff --git a/src/storage/benches/bench_block_iter.rs b/src/storage/benches/bench_block_iter.rs
index 8de5f05b20c2..0b35e89dc0a6 100644
--- a/src/storage/benches/bench_block_iter.rs
+++ b/src/storage/benches/bench_block_iter.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 use std::sync::LazyLock;
 
 use bytes::{BufMut, Bytes, BytesMut};
diff --git a/src/storage/hummock_test/src/hummock_storage_tests.rs b/src/storage/hummock_test/src/hummock_storage_tests.rs
index 17d1101dccf2..781c1423a27e 100644
--- a/src/storage/hummock_test/src/hummock_storage_tests.rs
+++ b/src/storage/hummock_test/src/hummock_storage_tests.rs
@@ -428,7 +428,7 @@ async fn test_state_store_sync() {
 
     let read_version = hummock_storage.read_version();
 
-    let epoch1: _ = read_version.read().committed().max_committed_epoch() + 1;
+    let epoch1 = read_version.read().committed().max_committed_epoch() + 1;
     hummock_storage.init(epoch1);
 
     // ingest 16B batch
diff --git a/src/storage/src/lib.rs b/src/storage/src/lib.rs
index 93adf69ba934..3560124dbf5f 100644
--- a/src/storage/src/lib.rs
+++ b/src/storage/src/lib.rs
@@ -35,7 +35,7 @@
 #![feature(is_sorted)]
 #![feature(btree_drain_filter)]
 #![feature(exact_size_is_empty)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![cfg_attr(coverage, feature(no_coverage))]
 #![recursion_limit = "256"]
 #![feature(error_generic_member_access)]
diff --git a/src/storage/src/memory.rs b/src/storage/src/memory.rs
index 115ee19aac99..0a7fb2e4a4c2 100644
--- a/src/storage/src/memory.rs
+++ b/src/storage/src/memory.rs
@@ -636,9 +636,7 @@ impl<R: RangeKv> StateStore for RangeKvStateStore<R> {
         async move {
             self.inner.flush()?;
             // memory backend doesn't need to push to S3, so this is a no-op
-            Ok(SyncResult {
-                ..Default::default()
-            })
+            Ok(SyncResult::default())
         }
     }
 
diff --git a/src/stream/src/lib.rs b/src/stream/src/lib.rs
index 00ce17912c3f..c404f6aaec17 100644
--- a/src/stream/src/lib.rs
+++ b/src/stream/src/lib.rs
@@ -15,7 +15,6 @@
 #![allow(rustdoc::private_intra_doc_links)]
 #![allow(clippy::derive_partial_eq_without_eq)]
 #![allow(incomplete_features)] // for feature(return_position_impl_trait_in_trait)
-#![feature(binary_heap_retain)]
 #![feature(iterator_try_collect)]
 #![feature(trait_alias)]
 #![feature(type_alias_impl_trait)]
@@ -34,7 +33,7 @@
 #![feature(result_option_inspect)]
 #![feature(never_type)]
 #![feature(btreemap_alloc)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(error_generic_member_access)]
 #![feature(provide_any)]
 #![feature(btree_drain_filter)]
diff --git a/src/tests/simulation/src/lib.rs b/src/tests/simulation/src/lib.rs
index 5d41b5094502..8e0bd81ad6ee 100644
--- a/src/tests/simulation/src/lib.rs
+++ b/src/tests/simulation/src/lib.rs
@@ -15,7 +15,7 @@
 #![cfg(madsim)]
 #![feature(trait_alias)]
 #![feature(lint_reasons)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 
 pub mod client;
 pub mod cluster;
diff --git a/src/tests/simulation/src/main.rs b/src/tests/simulation/src/main.rs
index 06689ef3b7dd..7d2da45f9169 100644
--- a/src/tests/simulation/src/main.rs
+++ b/src/tests/simulation/src/main.rs
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 #![cfg_attr(not(madsim), allow(dead_code))]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 
 use std::path::PathBuf;
 
diff --git a/src/tests/sqlsmith/src/lib.rs b/src/tests/sqlsmith/src/lib.rs
index 6de404a09bb5..68008ad535fc 100644
--- a/src/tests/sqlsmith/src/lib.rs
+++ b/src/tests/sqlsmith/src/lib.rs
@@ -14,7 +14,7 @@
 
 #![feature(let_chains)]
 #![feature(if_let_guard)]
-#![feature(once_cell)]
+#![feature(lazy_cell)]
 #![feature(box_patterns)]
 
 use rand::prelude::SliceRandom;
diff --git a/src/utils/pgwire/src/lib.rs b/src/utils/pgwire/src/lib.rs
index 19a4d3f5a6df..3ee3dce7f708 100644
--- a/src/utils/pgwire/src/lib.rs
+++ b/src/utils/pgwire/src/lib.rs
@@ -13,7 +13,7 @@
 // limitations under the License.
 
 #![feature(io_error_other)]
-#![feature(lint_reasons, once_cell)]
+#![feature(lint_reasons)]
 #![feature(trait_alias)]
 #![feature(result_option_inspect)]
 #![feature(iterator_try_collect)]
diff --git a/src/utils/task_stats_alloc/src/lib.rs b/src/utils/task_stats_alloc/src/lib.rs
index 156708c84f11..655c4a205fab 100644
--- a/src/utils/task_stats_alloc/src/lib.rs
+++ b/src/utils/task_stats_alloc/src/lib.rs
@@ -14,7 +14,6 @@
 
 #![feature(allocator_api)]
 #![feature(lint_reasons)]
-#![feature(atomic_mut_ptr)]
 
 use std::alloc::{GlobalAlloc, Layout, System};
 use std::future::Future;