std: deny(unsafe_op_in_unsafe_fn) but allow sites

This provides a list of locations to hunt down issues in.

std/src/collections/hash/map.rs

@@ -1,3 +1,5 @@
+#![allow(unsafe_op_in_unsafe_fn)]
+
 #[cfg(test)]
 mod tests;
 

std/src/env.rs

@@ -9,6 +9,7 @@
 //! and those without will return a [`String`].
 
 #![stable(feature = "env", since = "1.0.0")]
+#![allow(unsafe_op_in_unsafe_fn)]
 
 #[cfg(test)]
 mod tests;

std/src/ffi/mod.rs

@@ -160,6 +160,7 @@
 //! [`from_wide`]: crate::os::windows::ffi::OsStringExt::from_wide "os::windows::ffi::OsStringExt::from_wide"
 
 #![stable(feature = "rust1", since = "1.0.0")]
+#![allow(unsafe_op_in_unsafe_fn)]
 
 #[unstable(feature = "c_str_module", issue = "112134")]
 pub mod c_str;

std/src/io/mod.rs

@@ -293,6 +293,7 @@
 //! [`Arc`]: crate::sync::Arc
 
 #![stable(feature = "rust1", since = "1.0.0")]
+#![allow(unsafe_op_in_unsafe_fn)]
 
 #[cfg(test)]
 mod tests;

std/src/lib.rs

@@ -252,6 +252,7 @@
 #![allow(internal_features)]
 #![deny(rustc::existing_doc_keyword)]
 #![deny(fuzzy_provenance_casts)]
+#![deny(unsafe_op_in_unsafe_fn)]
 #![allow(rustdoc::redundant_explicit_links)]
 // Ensure that std can be linked against panic_abort despite compiled with `-C panic=unwind`
 #![deny(ffi_unwind_calls)]
@@ -664,7 +665,7 @@ pub mod alloc;
 mod panicking;
 
 #[path = "../../backtrace/src/lib.rs"]
-#[allow(dead_code, unused_attributes, fuzzy_provenance_casts)]
+#[allow(dead_code, unused_attributes, fuzzy_provenance_casts, unsafe_op_in_unsafe_fn)]
 mod backtrace_rs;
 
 // Re-export macros defined in core.

std/src/os/mod.rs

@@ -2,6 +2,7 @@
 
 #![stable(feature = "os", since = "1.0.0")]
 #![allow(missing_docs, nonstandard_style, missing_debug_implementations)]
+#![allow(unsafe_op_in_unsafe_fn)]
 
 pub mod raw;
 

std/src/sync/mod.rs

@@ -157,6 +157,7 @@
 //! [`RwLock`]: crate::sync::RwLock
 
 #![stable(feature = "rust1", since = "1.0.0")]
+#![allow(unsafe_op_in_unsafe_fn)]
 
 #[stable(feature = "rust1", since = "1.0.0")]
 pub use alloc_crate::sync::{Arc, Weak};

std/src/sys/mod.rs

@@ -1,3 +1,5 @@
+#![allow(unsafe_op_in_unsafe_fn)]
+
 /// The PAL (platform abstraction layer) contains platform-specific abstractions
 /// for implementing the features in the other submodules, e.g. UNIX file
 /// descriptors.

std/src/sys_common/mod.rs

@@ -16,6 +16,7 @@
 
 #![allow(missing_docs)]
 #![allow(missing_debug_implementations)]
+#![allow(unsafe_op_in_unsafe_fn)]
 
 #[cfg(test)]
 mod tests;