Migrate most of wasmtime from lazy_static to once_cell (#4368)

* Update tracing-core to a version which doesn't depend on lazy-static. * Update crossbeam-utils to a version that doesn't depend on lazy-static. * Update crossbeam-epoch to a version that doesn't depend on lazy-static. * Update clap to a version that doesn't depend on lazy-static. * Convert Wasmtime's own use of lazy_static to once_cell. * Make `GDB_REGISTRATION`'s comment a doc comment. * Fix compilation on Windows.
2022-07-05 10:52:48 -07:00
parent d9e0e6a6a9
commit 371ae80ac3
25 changed files with 123 additions and 138 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -404,16 +404,16 @@ dependencies = [

 [[package]]
 name = "clap"
-version = "3.1.15"
+version = "3.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85a35a599b11c089a7f49105658d089b8f2cf0882993c17daf6de15285c2c35d"
+checksum = "190814073e85d238f31ff738fcb0bf6910cedeb73376c87cd69291028966fd83"
 dependencies = [
 "atty",
 "bitflags",
 "clap_derive",
 "clap_lex",
 "indexmap",
- "lazy_static",
+ "once_cell",
 "strsim",
 "termcolor",
 "textwrap 0.15.0",
@@ -421,9 +421,9 @@ dependencies = [

 [[package]]
 name = "clap_derive"
-version = "3.1.7"
+version = "3.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3aab4734e083b809aaf5794e14e756d1c798d2c69c7f7de7a09a2f5214993c1"
+checksum = "759bf187376e1afa7b85b959e6a664a3e7a95203415dba952ad19139e798f902"
 dependencies = [
 "heck",
 "proc-macro-error",
@@ -434,9 +434,9 @@ dependencies = [

 [[package]]
 name = "clap_lex"
-version = "0.2.0"
+version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a37c35f1112dad5e6e0b1adaff798507497a18fceeb30cceb3bae7d1427b9213"
+checksum = "2850f2f5a82cbf437dd5af4d49848fbdfc27c157c3d010345776f952765261c5"
 dependencies = [
 "os_str_bytes",
 ]
@@ -688,7 +688,7 @@ dependencies = [
 name = "cranelift-serde"
 version = "0.87.0"
 dependencies = [
- "clap 3.1.15",
+ "clap 3.2.8",
 "cranelift-codegen",
 "cranelift-reader",
 "serde_json",
@@ -701,7 +701,7 @@ dependencies = [
 "anyhow",
 "capstone",
 "cfg-if",
- "clap 3.1.15",
+ "clap 3.2.8",
 "cranelift",
 "cranelift-codegen",
 "cranelift-entity",
@@ -814,26 +814,26 @@ dependencies = [

 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.8"
+version = "0.9.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1145cf131a2c6ba0615079ab6a638f7e1973ac9c2634fcbeaaad6114246efe8c"
+checksum = "07db9d94cbd326813772c968ccd25999e5f8ae22f4f8d1b11effa37ef6ce281d"
 dependencies = [
 "autocfg 1.1.0",
 "cfg-if",
 "crossbeam-utils",
- "lazy_static",
 "memoffset",
+ "once_cell",
 "scopeguard",
 ]

 [[package]]
 name = "crossbeam-utils"
-version = "0.8.8"
+version = "0.8.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0bf124c720b7686e3c2663cf54062ab0f68a88af2fb6a030e87e30bf721fcb38"
+checksum = "7d82ee10ce34d7bc12c2122495e7593a9c41347ecdd64185af4ecf72cb1a7f83"
 dependencies = [
 "cfg-if",
- "lazy_static",
+ "once_cell",
 ]

 [[package]]
@@ -1467,7 +1467,7 @@ dependencies = [
 name = "islec"
 version = "0.1.0"
 dependencies = [
- "clap 3.1.15",
+ "clap 3.2.8",
 "cranelift-isle",
 "env_logger 0.9.0",
 "miette",
@@ -2945,11 +2945,11 @@ dependencies = [

 [[package]]
 name = "tracing-core"
-version = "0.1.26"
+version = "0.1.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f54c8ca710e81886d498c2fd3331b56c93aa248d49de2222ad2742247c60072f"
+checksum = "7b7358be39f2f274f322d2aaed611acc57f382e8eb1e5b48cb9ae30933495ce7"
 dependencies = [
- "lazy_static",
+ "once_cell",
 "valuable",
 ]

@@ -3101,7 +3101,7 @@ dependencies = [
 "io-extras",
 "io-lifetimes",
 "is-terminal",
- "lazy_static",
+ "once_cell",
 "rustix",
 "system-interface",
 "tempfile",
@@ -3164,7 +3164,6 @@ dependencies = [
 "cap-tempfile",
 "io-extras",
 "io-lifetimes",
- "lazy_static",
 "rustix",
 "tempfile",
 "tokio",
@@ -3268,8 +3267,8 @@ dependencies = [
 name = "wasm-spec-interpreter"
 version = "0.1.0"
 dependencies = [
- "lazy_static",
 "ocaml-interop",
+ "once_cell",
 "wat",
 ]

@@ -3326,7 +3325,6 @@ dependencies = [
 "bincode",
 "cfg-if",
 "indexmap",
- "lazy_static",
 "libc",
 "log",
 "object",
@@ -3402,9 +3400,9 @@ dependencies = [
 "directories-next",
 "file-per-thread-logger",
 "filetime",
- "lazy_static",
 "log",
 "more-asserts",
+ "once_cell",
 "pretty_env_logger",
 "rustix",
 "serde",
@@ -3421,13 +3419,12 @@ version = "0.40.0"
 dependencies = [
 "anyhow",
 "async-trait",
- "clap 3.1.15",
+ "clap 3.2.8",
 "component-macro-test",
 "criterion",
 "env_logger 0.9.0",
 "filecheck",
 "humantime 2.1.0",
- "lazy_static",
 "libc",
 "listenfd",
 "memchr",
@@ -3461,7 +3458,7 @@ name = "wasmtime-cli-flags"
 version = "0.40.0"
 dependencies = [
 "anyhow",
- "clap 3.1.15",
+ "clap 3.2.8",
 "file-per-thread-logger",
 "pretty_env_logger",
 "rayon",
@@ -3596,8 +3593,8 @@ dependencies = [
 name = "wasmtime-jit-debug"
 version = "0.40.0"
 dependencies = [
- "lazy_static",
 "object",
+ "once_cell",
 "rustix",
 ]

--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,12 +30,12 @@ wasmtime-wast = { path = "crates/wast", version = "=0.40.0" }
 wasmtime-wasi = { path = "crates/wasi", version = "0.40.0" }
 wasmtime-wasi-crypto = { path = "crates/wasi-crypto", version = "0.40.0", optional = true }
 wasmtime-wasi-nn = { path = "crates/wasi-nn", version = "0.40.0", optional = true }
-clap = { version = "3.1.12", features = ["color", "suggestions", "derive"] }
+clap = { version = "3.2.0", features = ["color", "suggestions", "derive"] }
 anyhow = "1.0.19"
 target-lexicon = { version = "0.12.0", default-features = false }
 libc = "0.2.60"
 humantime = "2.0.0"
-lazy_static = "1.4.0"
+once_cell = "1.12"
 listenfd = "1.0.0"

 [target.'cfg(unix)'.dependencies]
--- a/cranelift/Cargo.toml
+++ b/cranelift/Cargo.toml
@@ -41,7 +41,7 @@ indicatif = "0.13.0"
 thiserror = "1.0.15"
 walkdir = "2.2"
 anyhow = "1.0.32"
-clap = { version = "3.1.12", features = ["derive"] }
+clap = { version = "3.2.0", features = ["derive"] }

 [features]
 default = ["disas", "wasm", "cranelift-codegen/all-arch", "souper-harvest"]
--- a/cranelift/isle/islec/Cargo.toml
+++ b/cranelift/isle/islec/Cargo.toml
@@ -10,4 +10,4 @@ publish = false
 cranelift-isle = { version = "*", path = "../isle/", features = ["miette-errors", "logging"] }
 env_logger = { version = "0.9", default-features = false }
 miette = { version = "4.7.0", features = ["fancy"] }
-clap = { version = "3.1.12", features = ["derive"] }
+clap = { version = "3.2.0", features = ["derive"] }
--- a/cranelift/serde/Cargo.toml
+++ b/cranelift/serde/Cargo.toml
@@ -14,7 +14,7 @@ name = "clif-json"
 path = "src/clif-json.rs"

 [dependencies]
-clap = { version = "3.1.12", features = ["derive"] }
+clap = { version = "3.2.0", features = ["derive"] }
 serde_json = "1.0.26"
 cranelift-codegen = { path = "../codegen", version = "0.87.0", features = ["enable-serde"] }
 cranelift-reader = { path = "../reader", version = "0.87.0" }
--- a/crates/cache/Cargo.toml
+++ b/crates/cache/Cargo.toml
@@ -31,7 +31,7 @@ rustix = { version = "0.35.6", features = ["process"] }

 [dev-dependencies]
 filetime = "0.2.7"
-lazy_static = "1.3.0"
+once_cell = "1.12.0"
 more-asserts = "0.2.1"
 pretty_env_logger = "0.4.0"
 tempfile = "3"
--- a/crates/cache/src/worker/tests/system_time_stub.rs
+++ b/crates/cache/src/worker/tests/system_time_stub.rs
@@ -1,9 +1,7 @@
-use lazy_static::lazy_static;
+use once_cell::sync::Lazy;
 use std::time::{Duration, SystemTime, SystemTimeError};

-lazy_static! {
-    pub static ref NOW: SystemTime = SystemTime::now(); // no need for RefCell and set_now() for now
-}
+pub static NOW: Lazy<SystemTime> = Lazy::new(SystemTime::now);

 #[derive(PartialOrd, PartialEq, Ord, Eq)]
 pub struct SystemTimeStub(SystemTime);
--- a/crates/cli-flags/Cargo.toml
+++ b/crates/cli-flags/Cargo.toml
@@ -10,7 +10,7 @@ edition = "2021"

 [dependencies]
 anyhow = "1.0.19"
-clap = { version = "3.1.12", features = ["color", "suggestions", "derive"] }
+clap = { version = "3.2.0", features = ["color", "suggestions", "derive"] }
 file-per-thread-logger = "0.1.1"
 pretty_env_logger = "0.4.0"
 rayon = "1.5.0"
--- a/crates/fuzzing/wasm-spec-interpreter/Cargo.toml
+++ b/crates/fuzzing/wasm-spec-interpreter/Cargo.toml
@@ -13,10 +13,10 @@ license = "Apache-2.0 WITH LLVM-exception"
 # `build-libinterpret` feature set by this crate's parent).
 [dependencies]
 ocaml-interop = { version = "0.8", optional = true }
-lazy_static = { version = "1.4", optional = true }
+once_cell = { version = "1.12.0", optional = true }

 [dev-dependencies]
 wat = "1.0"

 [features]
-build-libinterpret = ["ocaml-interop", "lazy_static"]
+build-libinterpret = ["ocaml-interop", "once_cell"]
--- a/crates/fuzzing/wasm-spec-interpreter/src/with_library.rs
+++ b/crates/fuzzing/wasm-spec-interpreter/src/with_library.rs
@@ -7,13 +7,11 @@
 //! assert_eq!(results, &[Value::I32(43)]);
 //! ```
 use crate::Value;
-use lazy_static::lazy_static;
 use ocaml_interop::{OCamlRuntime, ToOCaml};
+use once_cell::sync::Lazy;
 use std::sync::Mutex;

-lazy_static! {
-    static ref INTERPRET: Mutex<()> = Mutex::new(());
-}
+static INTERPRET: Lazy<Mutex<()>> = Lazy::new(|| Mutex::new(()));

 /// Interpret the first function in the passed WebAssembly module (in Wasm form,
 /// currently, not WAT), optionally with the given parameters. If no parameters
--- a/crates/jit-debug/Cargo.toml
+++ b/crates/jit-debug/Cargo.toml
@@ -11,7 +11,7 @@ readme = "README.md"
 edition = "2021"

 [dependencies]
-lazy_static = {version = "1.3.0", optional = true }
+once_cell = {version = "1.12.0", optional = true }
 object = { version = "0.28.0", default-features = false, features = ["std", "read_core"], optional = true }

 [target.'cfg(target_os = "linux")'.dependencies]
@@ -21,5 +21,5 @@ rustix = { version = "0.35.6", features = ["mm", "param", "time"], optional = tr
 maintenance = { status = "actively-developed" }

 [features]
-gdb_jit_int = ["lazy_static"]
+gdb_jit_int = ["once_cell"]
 perf_jitdump = ["rustix", "object"]
--- a/crates/jit-debug/src/gdb_jit_int.rs
+++ b/crates/jit-debug/src/gdb_jit_int.rs
@@ -2,7 +2,7 @@
 //! the __jit_debug_register_code() and __jit_debug_descriptor to register
 //! or unregister generated object images with debuggers.

-use lazy_static::lazy_static;
+use once_cell::sync::Lazy;
 use std::pin::Pin;
 use std::ptr;
 use std::sync::Mutex;
@@ -32,15 +32,13 @@ extern "C" {
    fn __jit_debug_register_code();
 }

-lazy_static! {
-    // The process controls access to the __jit_debug_descriptor by itself --
-    // the GDB/LLDB accesses this structure and its data at the process startup
-    // and when paused in __jit_debug_register_code.
-    //
-    // The GDB_REGISTRATION lock is needed for GdbJitImageRegistration to protect
-    // access to the __jit_debug_descriptor within this process.
-    pub static ref GDB_REGISTRATION: Mutex<()> = Mutex::new(Default::default());
-}
+/// The process controls access to the __jit_debug_descriptor by itself --
+/// the GDB/LLDB accesses this structure and its data at the process startup
+/// and when paused in __jit_debug_register_code.
+///
+/// The GDB_REGISTRATION lock is needed for GdbJitImageRegistration to protect
+/// access to the __jit_debug_descriptor within this process.
+static GDB_REGISTRATION: Lazy<Mutex<()>> = Lazy::new(|| Mutex::new(Default::default()));

 /// Registeration for JIT image
 pub struct GdbJitImageRegistration {
--- a/crates/test-programs/wasi-tests/Cargo.lock
+++ b/crates/test-programs/wasi-tests/Cargo.lock
@@ -1,10 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-[[package]]
-name = "lazy_static"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+version = 3

 [[package]]
 name = "libc"
@@ -18,6 +14,12 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0debeb9fcf88823ea64d64e4a815ab1643f33127d995978e099942ce38f25238"

+[[package]]
+name = "once_cell"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7709cef83f0c1f58f666e746a08b21e0085f7440fa6a29cc194d68aac97a4225"
+
 [[package]]
 name = "wasi"
 version = "0.10.2+wasi-snapshot-preview1"
@@ -28,8 +30,8 @@ checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
 name = "wasi-tests"
 version = "0.19.0"
 dependencies = [
- "lazy_static",
 "libc",
 "more-asserts",
+ "once_cell",
 "wasi",
 ]
--- a/crates/test-programs/wasi-tests/Cargo.toml
+++ b/crates/test-programs/wasi-tests/Cargo.toml
@@ -10,7 +10,7 @@ publish = false
 libc = "0.2.65"
 wasi = "0.10.2"
 more-asserts = "0.2.1"
-lazy_static = "1.4"
+once_cell = "1.12.0"

 # This crate is built with the wasm32-wasi target, so it's separate
 # from the main Wasmtime build, so use this directive to exclude it
--- a/crates/test-programs/wasi-tests/src/lib.rs
+++ b/crates/test-programs/wasi-tests/src/lib.rs
@@ -1,9 +1,8 @@
 use more_asserts::assert_gt;
 pub mod config;
+use once_cell::sync::Lazy;

-lazy_static::lazy_static! {
-    pub static ref TESTCONFIG: config::TestConfig = config::TestConfig::from_env();
-}
+pub static TESTCONFIG: Lazy<config::TestConfig> = Lazy::new(config::TestConfig::from_env);

 // The `wasi` crate version 0.9.0 and beyond, doesn't
 // seem to define these constants, so we do it ourselves.
--- a/crates/wasi-common/cap-std-sync/Cargo.toml
+++ b/crates/wasi-common/cap-std-sync/Cargo.toml
@@ -29,7 +29,7 @@ is-terminal = "0.3.0"
 rustix = { version = "0.35.6", features = ["fs"] }

 [target.'cfg(windows)'.dependencies]
-lazy_static = "1.4"
+once_cell = "1.12.0"
 io-extras = "0.15.0"

 [target.'cfg(windows)'.dependencies.windows-sys]
--- a/crates/wasi-common/cap-std-sync/src/sched/windows.rs
+++ b/crates/wasi-common/cap-std-sync/src/sched/windows.rs
@@ -9,6 +9,7 @@
 // taken the time to improve it. See bug #2880.

 use anyhow::Context;
+use once_cell::sync::Lazy;
 use std::ops::Deref;
 use std::sync::mpsc::{self, Receiver, RecvTimeoutError, Sender, TryRecvError};
 use std::sync::Mutex;
@@ -145,9 +146,7 @@ struct StdinPoll {
    notify_rx: Receiver<PollState>,
 }

-lazy_static::lazy_static! {
-    static ref STDIN_POLL: Mutex<StdinPoll> = StdinPoll::new();
-}
+static STDIN_POLL: Lazy<Mutex<StdinPoll>> = Lazy::new(StdinPoll::new);

 impl StdinPoll {
    pub fn new() -> Mutex<Self> {
--- a/crates/wasi-common/tokio/Cargo.toml
+++ b/crates/wasi-common/tokio/Cargo.toml
@@ -23,7 +23,6 @@ io-lifetimes = { version = "0.7.0", default-features = false }
 rustix = { version = "0.35.6", features = ["fs"] }

 [target.'cfg(windows)'.dependencies]
-lazy_static = "1.4"
 io-extras = "0.15.0"

 [dev-dependencies]
--- a/crates/wasmtime/Cargo.toml
+++ b/crates/wasmtime/Cargo.toml
@@ -34,11 +34,10 @@ bincode = "1.2.1"
 indexmap = "1.6"
 paste = "1.0.3"
 psm = "0.1.11"
-lazy_static = "1.4"
+once_cell = "1.12.0"
 rayon = { version = "1.0", optional = true }
 object = { version = "0.28", default-features = false, features = ['read_core', 'elf'] }
 async-trait = { version = "0.1.51", optional = true }
-once_cell = "1.12"

 [target.'cfg(target_os = "windows")'.dependencies.windows-sys]
 version = "0.36.0"
--- a/crates/wasmtime/src/module/registry.rs
+++ b/crates/wasmtime/src/module/registry.rs
@@ -3,6 +3,7 @@
 #[cfg(feature = "component-model")]
 use crate::component::Component;
 use crate::{FrameInfo, Module};
+use once_cell::sync::Lazy;
 use std::{
    collections::BTreeMap,
    sync::{Arc, RwLock},
@@ -201,9 +202,7 @@ impl ModuleRegistry {
 // it is also automatically registered with the singleton global module
 // registry. When a `ModuleRegistry` is destroyed then all of its entries
 // are removed from the global module registry.
-lazy_static::lazy_static! {
-    static ref GLOBAL_MODULES: RwLock<GlobalModuleRegistry> = Default::default();
-}
+static GLOBAL_MODULES: Lazy<RwLock<GlobalModuleRegistry>> = Lazy::new(Default::default);

 type GlobalModuleRegistry = BTreeMap<usize, (usize, TrapInfo)>;

--- a/src/commands/compile.rs
+++ b/src/commands/compile.rs
@@ -2,36 +2,35 @@

 use anyhow::{bail, Context, Result};
 use clap::Parser;
+use once_cell::sync::Lazy;
 use std::fs;
 use std::path::PathBuf;
 use target_lexicon::Triple;
 use wasmtime::Engine;
 use wasmtime_cli_flags::CommonOptions;

-lazy_static::lazy_static! {
-    static ref AFTER_HELP: String = {
-        format!(
-            "By default, no CPU features or presets will be enabled for the compilation.\n\
-            \n\
-            {}\
-            \n\
-            Usage examples:\n\
-            \n\
-            Compiling a WebAssembly module for the current platform:\n\
-            \n  \
-            wasmtime compile example.wasm
-            \n\
-            Specifying the output file:\n\
-            \n  \
-            wasmtime compile -o output.cwasm input.wasm\n\
-            \n\
-            Compiling for a specific platform (Linux) and CPU preset (Skylake):\n\
-            \n  \
-            wasmtime compile --target x86_64-unknown-linux --cranelift-enable skylake foo.wasm\n",
-            crate::FLAG_EXPLANATIONS.as_str()
-        )
-    };
-}
+static AFTER_HELP: Lazy<String> = Lazy::new(|| {
+    format!(
+        "By default, no CPU features or presets will be enabled for the compilation.\n\
+        \n\
+        {}\
+        \n\
+        Usage examples:\n\
+        \n\
+        Compiling a WebAssembly module for the current platform:\n\
+        \n  \
+        wasmtime compile example.wasm
+        \n\
+        Specifying the output file:\n\
+        \n  \
+        wasmtime compile -o output.cwasm input.wasm\n\
+        \n\
+        Compiling for a specific platform (Linux) and CPU preset (Skylake):\n\
+        \n  \
+        wasmtime compile --target x86_64-unknown-linux --cranelift-enable skylake foo.wasm\n",
+        crate::FLAG_EXPLANATIONS.as_str()
+    )
+});

 /// Compiles a WebAssembly module.
 #[derive(Parser)]
--- a/src/commands/run.rs
+++ b/src/commands/run.rs
@@ -2,6 +2,7 @@

 use anyhow::{anyhow, bail, Context as _, Result};
 use clap::Parser;
+use once_cell::sync::Lazy;
 use std::fs::File;
 use std::io::Read;
 use std::thread;
@@ -65,11 +66,7 @@ fn parse_preloads(s: &str) -> Result<(String, PathBuf)> {
    Ok((parts[0].into(), parts[1].into()))
 }

-lazy_static::lazy_static! {
-    static ref AFTER_HELP: String = {
-        crate::FLAG_EXPLANATIONS.to_string()
-    };
-}
+static AFTER_HELP: Lazy<String> = Lazy::new(|| crate::FLAG_EXPLANATIONS.to_string());

 /// Runs a WebAssembly module
 #[derive(Parser)]
--- a/src/commands/wast.rs
+++ b/src/commands/wast.rs
@@ -2,16 +2,13 @@

 use anyhow::{Context as _, Result};
 use clap::Parser;
+use once_cell::sync::Lazy;
 use std::path::PathBuf;
 use wasmtime::{Engine, Store};
 use wasmtime_cli_flags::CommonOptions;
 use wasmtime_wast::WastContext;

-lazy_static::lazy_static! {
-    static ref AFTER_HELP: String = {
-        crate::FLAG_EXPLANATIONS.to_string()
-    };
-}
+static AFTER_HELP: Lazy<String> = Lazy::new(|| crate::FLAG_EXPLANATIONS.to_string());

 /// Runs a WebAssembly test script file
 #[derive(Parser)]
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -23,36 +23,41 @@
    )
 )]

+use once_cell::sync::Lazy;
 use wasmtime_cli_flags::{SUPPORTED_WASI_MODULES, SUPPORTED_WASM_FEATURES};

-lazy_static::lazy_static! {
-    static ref FLAG_EXPLANATIONS: String = {
-        use std::fmt::Write;
+static FLAG_EXPLANATIONS: Lazy<String> = Lazy::new(|| {
+    use std::fmt::Write;

-        let mut s = String::new();
+    let mut s = String::new();

-        // Explain --wasm-features.
-        writeln!(&mut s, "Supported values for `--wasm-features`:").unwrap();
-        writeln!(&mut s).unwrap();
-        let max = SUPPORTED_WASM_FEATURES.iter().max_by_key(|(name, _)| name.len()).unwrap();
-        for (name, desc) in SUPPORTED_WASM_FEATURES.iter() {
-            writeln!(&mut s, "{:width$} {}", name, desc, width = max.0.len() + 2).unwrap();
-        }
-        writeln!(&mut s).unwrap();
+    // Explain --wasm-features.
+    writeln!(&mut s, "Supported values for `--wasm-features`:").unwrap();
+    writeln!(&mut s).unwrap();
+    let max = SUPPORTED_WASM_FEATURES
+        .iter()
+        .max_by_key(|(name, _)| name.len())
+        .unwrap();
+    for (name, desc) in SUPPORTED_WASM_FEATURES.iter() {
+        writeln!(&mut s, "{:width$} {}", name, desc, width = max.0.len() + 2).unwrap();
+    }
+    writeln!(&mut s).unwrap();

-        // Explain --wasi-modules.
-        writeln!(&mut s, "Supported values for `--wasi-modules`:").unwrap();
-        writeln!(&mut s).unwrap();
-        let max = SUPPORTED_WASI_MODULES.iter().max_by_key(|(name, _)| name.len()).unwrap();
-        for (name, desc) in SUPPORTED_WASI_MODULES.iter() {
-            writeln!(&mut s, "{:width$} {}", name, desc, width = max.0.len() + 2).unwrap();
-        }
+    // Explain --wasi-modules.
+    writeln!(&mut s, "Supported values for `--wasi-modules`:").unwrap();
+    writeln!(&mut s).unwrap();
+    let max = SUPPORTED_WASI_MODULES
+        .iter()
+        .max_by_key(|(name, _)| name.len())
+        .unwrap();
+    for (name, desc) in SUPPORTED_WASI_MODULES.iter() {
+        writeln!(&mut s, "{:width$} {}", name, desc, width = max.0.len() + 2).unwrap();
+    }

-        writeln!(&mut s).unwrap();
-        writeln!(&mut s, "Features prefixed with '-' will be disabled.").unwrap();
+    writeln!(&mut s).unwrap();
+    writeln!(&mut s, "Features prefixed with '-' will be disabled.").unwrap();

-        s
-    };
-}
+    s
+});

 pub mod commands;
--- a/tests/all/wast.rs
+++ b/tests/all/wast.rs
@@ -1,3 +1,4 @@
+use once_cell::sync::Lazy;
 use std::path::Path;
 use std::sync::{Condvar, Mutex};
 use wasmtime::{
@@ -118,9 +119,7 @@ fn feature_found(path: &Path, name: &str) -> bool {
 fn lock_pooling() -> impl Drop {
    const MAX_CONCURRENT_POOLING: u32 = 8;

-    lazy_static::lazy_static! {
-        static ref ACTIVE: MyState = MyState::default();
-    }
+    static ACTIVE: Lazy<MyState> = Lazy::new(MyState::default);

    #[derive(Default)]
    struct MyState {