1 files changed, 21 insertions, 12 deletions
diff --git a/runtime/ops/io.rs b/runtime/ops/io.rs
index 78263ce28..bef33e9fa 100644
--- a/runtime/ops/io.rs
+++ b/runtime/ops/io.rs
@@ -42,26 +42,35 @@ use {
 // alive for the duration of the application since the last handle/fd
 // being dropped will close the corresponding pipe.
 #[cfg(unix)]
-static STDIN_HANDLE: Lazy<StdFile> =
-  Lazy::new(|| unsafe { StdFile::from_raw_fd(0) });
+static STDIN_HANDLE: Lazy<StdFile> = Lazy::new(|| {
+  // SAFETY: corresponds to OS stdin
+  unsafe { StdFile::from_raw_fd(0) }
+});
 #[cfg(unix)]
-static STDOUT_HANDLE: Lazy<StdFile> =
-  Lazy::new(|| unsafe { StdFile::from_raw_fd(1) });
+static STDOUT_HANDLE: Lazy<StdFile> = Lazy::new(|| {
+  // SAFETY: corresponds to OS stdout
+  unsafe { StdFile::from_raw_fd(1) }
+});
 #[cfg(unix)]
-static STDERR_HANDLE: Lazy<StdFile> =
-  Lazy::new(|| unsafe { StdFile::from_raw_fd(2) });
+static STDERR_HANDLE: Lazy<StdFile> = Lazy::new(|| {
+  // SAFETY: corresponds to OS stderr
+  unsafe { StdFile::from_raw_fd(2) }
+});
 
 #[cfg(windows)]
-static STDIN_HANDLE: Lazy<StdFile> = Lazy::new(|| unsafe {
-  StdFile::from_raw_handle(GetStdHandle(winbase::STD_INPUT_HANDLE))
+static STDIN_HANDLE: Lazy<StdFile> = Lazy::new(|| {
+  // SAFETY: corresponds to OS stdin
+  unsafe { StdFile::from_raw_handle(GetStdHandle(winbase::STD_INPUT_HANDLE)) }
 });
 #[cfg(windows)]
-static STDOUT_HANDLE: Lazy<StdFile> = Lazy::new(|| unsafe {
-  StdFile::from_raw_handle(GetStdHandle(winbase::STD_OUTPUT_HANDLE))
+static STDOUT_HANDLE: Lazy<StdFile> = Lazy::new(|| {
+  // SAFETY: corresponds to OS stdout
+  unsafe { StdFile::from_raw_handle(GetStdHandle(winbase::STD_OUTPUT_HANDLE)) }
 });
 #[cfg(windows)]
-static STDERR_HANDLE: Lazy<StdFile> = Lazy::new(|| unsafe {
-  StdFile::from_raw_handle(GetStdHandle(winbase::STD_ERROR_HANDLE))
+static STDERR_HANDLE: Lazy<StdFile> = Lazy::new(|| {
+  // SAFETY: corresponds to OS stderr
+  unsafe { StdFile::from_raw_handle(GetStdHandle(winbase::STD_ERROR_HANDLE)) }
 });
 
 pub fn init() -> Extension {