Access generic_member_access APIs through core

build/probe.rs

@@ -4,9 +4,9 @@
 
 #![feature(error_generic_member_access)]
 
+use core::error::{self, Error, Request};
+use core::fmt::{self, Debug, Display};
 use std::backtrace::Backtrace;
-use std::error::{self, Error, Request};
-use std::fmt::{self, Debug, Display};
 
 struct MyError(Thing);
 struct Thing;

src/backtrace.rs

@@ -38,7 +38,8 @@ macro_rules! backtrace {
 #[cfg(error_generic_member_access)]
 macro_rules! backtrace_if_absent {
     ($err:expr) => {
-        match std::error::request_ref::<std::backtrace::Backtrace>($err as &dyn std::error::Error) {
+        match core::error::request_ref::<std::backtrace::Backtrace>($err as &dyn core::error::Error)
+        {
             Some(_) => None,
             None => backtrace!(),
         }

src/context.rs

@@ -4,7 +4,7 @@ use core::convert::Infallible;
 use core::fmt::{self, Debug, Display, Write};
 
 #[cfg(error_generic_member_access)]
-use std::error::Request;
+use core::error::Request;
 
 mod ext {
     use super::*;

src/error.rs

@@ -6,13 +6,13 @@ use crate::ptr::{Own, Ref};
 use crate::{Error, StdError};
 use alloc::boxed::Box;
 use core::any::TypeId;
+#[cfg(error_generic_member_access)]
+use core::error::{self, Request};
 use core::fmt::{self, Debug, Display};
 use core::mem::ManuallyDrop;
 #[cfg(not(anyhow_no_ptr_addr_of))]
 use core::ptr;
 use core::ptr::NonNull;
-#[cfg(error_generic_member_access)]
-use std::error::{self, Request};
 
 #[cfg(feature = "std")]
 use core::ops::{Deref, DerefMut};

src/wrapper.rs

@@ -5,7 +5,7 @@ use core::fmt::{self, Debug, Display};
 use alloc::boxed::Box;
 
 #[cfg(error_generic_member_access)]
-use std::error::Request;
+use core::error::Request;
 
 #[repr(transparent)]
 pub struct MessageError<M>(pub M);