changelog: [`cast_slice_from_raw_parts`]: properly select std/core

Signed-off-by: Zihan <zihanli0822@gmail.com>

6 files changed, 218 insertions, 23 deletions

diff --git a/clippy_lints/src/casts/cast_slice_from_raw_parts.rs b/clippy_lints/src/casts/cast_slice_from_raw_parts.rs
index 24bfb735564..bce7b4c69cc 100644
--- a/clippy_lints/src/casts/cast_slice_from_raw_parts.rs
+++ b/clippy_lints/src/casts/cast_slice_from_raw_parts.rs
@@ -1,7 +1,7 @@
 use clippy_utils::diagnostics::span_lint_and_sugg;
-use clippy_utils::get_parent_expr;
 use clippy_utils::msrvs::{self, Msrv};
 use clippy_utils::source::snippet_with_context;
+use clippy_utils::{get_parent_expr, is_no_std_crate};
 use rustc_errors::Applicability;
 use rustc_hir::def_id::DefId;
 use rustc_hir::{Expr, ExprKind};
@@ -44,13 +44,14 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>,
         let mut applicability = Applicability::MachineApplicable;
         let ptr = snippet_with_context(cx, ptr_arg.span, ctxt, "ptr", &mut applicability).0;
         let len = snippet_with_context(cx, len_arg.span, ctxt, "len", &mut applicability).0;
+        let krate = if is_no_std_crate(cx) { "core" } else { "std" };
         span_lint_and_sugg(
             cx,
             CAST_SLICE_FROM_RAW_PARTS,
             span,
             format!("casting the result of `{func}` to {cast_to}"),
             "replace with",
-            format!("core::ptr::slice_{func}({ptr}, {len})"),
+            format!("{krate}::ptr::slice_{func}({ptr}, {len})"),
             applicability,
         );
     }
@@ -81,13 +82,14 @@ pub(super) fn check_implicit_cast(cx: &LateContext<'_>, expr: &Expr<'_>) {
         let ctxt = expr.span.ctxt();
         let ptr = snippet_with_context(cx, ptr_arg.span, ctxt, "ptr", &mut applicability).0;
         let len = snippet_with_context(cx, len_arg.span, ctxt, "len", &mut applicability).0;
+        let krate = if is_no_std_crate(cx) { "core" } else { "std" };
         span_lint_and_sugg(
             cx,
             CAST_SLICE_FROM_RAW_PARTS,
             expr.span,
             format!("implicitly casting the result of `{func}` to `{target}`"),
             "replace_with",
-            format!("core::ptr::slice_{func}({ptr}, {len})"),
+            format!("{krate}::ptr::slice_{func}({ptr}, {len})"),
             applicability,
         );
     }
diff --git a/tests/ui/cast_raw_slice_pointer_cast.fixed b/tests/ui/cast_raw_slice_pointer_cast.fixed
index 14e232d0d2a..3c1cf884595 100644
--- a/tests/ui/cast_raw_slice_pointer_cast.fixed
+++ b/tests/ui/cast_raw_slice_pointer_cast.fixed
@@ -6,36 +6,36 @@ fn main() {
     let mut vec = vec![0u8; 1];
     let ptr: *const u8 = vec.as_ptr();
     let mptr = vec.as_mut_ptr();
-    let _: *const [u8] = unsafe { core::ptr::slice_from_raw_parts(ptr, 1) };
+    let _: *const [u8] = unsafe { std::ptr::slice_from_raw_parts(ptr, 1) };
     //~^ cast_slice_from_raw_parts
-    let _: *const [u8] = unsafe { core::ptr::slice_from_raw_parts_mut(mptr, 1) };
+    let _: *const [u8] = unsafe { std::ptr::slice_from_raw_parts_mut(mptr, 1) };
     //~^ cast_slice_from_raw_parts
-    let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+    let _: *const [u8] = std::ptr::slice_from_raw_parts(ptr, 1);
     //~^ cast_slice_from_raw_parts
     {
         use core::slice;
-        let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+        let _: *const [u8] = std::ptr::slice_from_raw_parts(ptr, 1);
         //~^ cast_slice_from_raw_parts
         use slice as one;
-        let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+        let _: *const [u8] = std::ptr::slice_from_raw_parts(ptr, 1);
         //~^ cast_slice_from_raw_parts
     }
     {
         use std::slice;
-        let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+        let _: *const [u8] = std::ptr::slice_from_raw_parts(ptr, 1);
         //~^ cast_slice_from_raw_parts
         use slice as one;
-        let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+        let _: *const [u8] = std::ptr::slice_from_raw_parts(ptr, 1);
         //~^ cast_slice_from_raw_parts
     }
 
     // implicit cast
     {
-        let _: *const [u8] = unsafe { core::ptr::slice_from_raw_parts(ptr, 1) };
+        let _: *const [u8] = unsafe { std::ptr::slice_from_raw_parts(ptr, 1) };
         //~^ cast_slice_from_raw_parts
-        let _: *mut [u8] = unsafe { core::ptr::slice_from_raw_parts_mut(mptr, 1) };
+        let _: *mut [u8] = unsafe { std::ptr::slice_from_raw_parts_mut(mptr, 1) };
         //~^ cast_slice_from_raw_parts
-        require_raw_slice_ptr(unsafe { core::ptr::slice_from_raw_parts(ptr, 1) });
+        require_raw_slice_ptr(unsafe { std::ptr::slice_from_raw_parts(ptr, 1) });
         //~^ cast_slice_from_raw_parts
     }
 
diff --git a/tests/ui/cast_raw_slice_pointer_cast.stderr b/tests/ui/cast_raw_slice_pointer_cast.stderr
index e70cc593bb0..328dbafbafe 100644
--- a/tests/ui/cast_raw_slice_pointer_cast.stderr
+++ b/tests/ui/cast_raw_slice_pointer_cast.stderr
@@ -2,7 +2,7 @@ error: casting the result of `from_raw_parts` to *const [u8]
   --> tests/ui/cast_raw_slice_pointer_cast.rs:9:35
    |
 LL |     let _: *const [u8] = unsafe { std::slice::from_raw_parts(ptr, 1) as *const [u8] };
-   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `std::ptr::slice_from_raw_parts(ptr, 1)`
    |
    = note: `-D clippy::cast-slice-from-raw-parts` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(clippy::cast_slice_from_raw_parts)]`
@@ -11,55 +11,55 @@ error: casting the result of `from_raw_parts_mut` to *mut [u8]
   --> tests/ui/cast_raw_slice_pointer_cast.rs:11:35
    |
 LL |     let _: *const [u8] = unsafe { std::slice::from_raw_parts_mut(mptr, 1) as *mut [u8] };
-   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts_mut(mptr, 1)`
+   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `std::ptr::slice_from_raw_parts_mut(mptr, 1)`
 
 error: casting the result of `from_raw_parts` to *const [u8]
   --> tests/ui/cast_raw_slice_pointer_cast.rs:13:26
    |
 LL |     let _: *const [u8] = unsafe { std::slice::from_raw_parts(ptr, 1) } as *const [u8];
-   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `std::ptr::slice_from_raw_parts(ptr, 1)`
 
 error: casting the result of `from_raw_parts` to *const [u8]
   --> tests/ui/cast_raw_slice_pointer_cast.rs:17:30
    |
 LL |         let _: *const [u8] = unsafe { slice::from_raw_parts(ptr, 1) } as *const [u8];
-   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `std::ptr::slice_from_raw_parts(ptr, 1)`
 
 error: casting the result of `from_raw_parts` to *const [u8]
   --> tests/ui/cast_raw_slice_pointer_cast.rs:20:30
    |
 LL |         let _: *const [u8] = unsafe { one::from_raw_parts(ptr, 1) } as *const [u8];
-   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `std::ptr::slice_from_raw_parts(ptr, 1)`
 
 error: casting the result of `from_raw_parts` to *const [u8]
   --> tests/ui/cast_raw_slice_pointer_cast.rs:25:30
    |
 LL |         let _: *const [u8] = unsafe { slice::from_raw_parts(ptr, 1) } as *const [u8];
-   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `std::ptr::slice_from_raw_parts(ptr, 1)`
 
 error: casting the result of `from_raw_parts` to *const [u8]
   --> tests/ui/cast_raw_slice_pointer_cast.rs:28:30
    |
 LL |         let _: *const [u8] = unsafe { one::from_raw_parts(ptr, 1) } as *const [u8];
-   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `std::ptr::slice_from_raw_parts(ptr, 1)`
 
 error: implicitly casting the result of `from_raw_parts` to `*const [u8]`
   --> tests/ui/cast_raw_slice_pointer_cast.rs:34:39
    |
 LL |         let _: *const [u8] = unsafe { std::slice::from_raw_parts(ptr, 1) };
-   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `std::ptr::slice_from_raw_parts(ptr, 1)`
 
 error: implicitly casting the result of `from_raw_parts_mut` to `*mut [u8]`
   --> tests/ui/cast_raw_slice_pointer_cast.rs:36:37
    |
 LL |         let _: *mut [u8] = unsafe { std::slice::from_raw_parts_mut(mptr, 1) };
-   |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `core::ptr::slice_from_raw_parts_mut(mptr, 1)`
+   |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `std::ptr::slice_from_raw_parts_mut(mptr, 1)`
 
 error: implicitly casting the result of `from_raw_parts` to `*const [u8]`
   --> tests/ui/cast_raw_slice_pointer_cast.rs:38:40
    |
 LL |         require_raw_slice_ptr(unsafe { std::slice::from_raw_parts(ptr, 1) });
-   |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+   |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `std::ptr::slice_from_raw_parts(ptr, 1)`
 
 error: implicitly casting the result of `from_raw_parts` to `*const [u8]`
   --> tests/ui/cast_raw_slice_pointer_cast.rs:46:39
diff --git a/tests/ui/cast_raw_slice_pointer_cast_no_std.fixed b/tests/ui/cast_raw_slice_pointer_cast_no_std.fixed
new file mode 100644
index 00000000000..f71fb8d863c
--- /dev/null
+++ b/tests/ui/cast_raw_slice_pointer_cast_no_std.fixed
@@ -0,0 +1,55 @@
+#![warn(clippy::cast_slice_from_raw_parts)]
+#![no_std]
+#![crate_type = "lib"]
+
+const fn require_raw_slice_ptr<T>(_: *const [T]) {}
+
+fn main() {
+    let mut arr = [0u8; 1];
+    let ptr: *const u8 = arr.as_ptr();
+    let mptr = arr.as_mut_ptr();
+    let _: *const [u8] = unsafe { core::ptr::slice_from_raw_parts(ptr, 1) };
+    //~^ cast_slice_from_raw_parts
+    let _: *const [u8] = unsafe { core::ptr::slice_from_raw_parts_mut(mptr, 1) };
+    //~^ cast_slice_from_raw_parts
+    let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+    //~^ cast_slice_from_raw_parts
+    {
+        use core::slice;
+        let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+        //~^ cast_slice_from_raw_parts
+        use slice as one;
+        let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+        //~^ cast_slice_from_raw_parts
+    }
+    {
+        use core::slice;
+        let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+        //~^ cast_slice_from_raw_parts
+        use slice as one;
+        let _: *const [u8] = core::ptr::slice_from_raw_parts(ptr, 1);
+        //~^ cast_slice_from_raw_parts
+    }
+
+    // implicit cast
+    {
+        let _: *const [u8] = unsafe { core::ptr::slice_from_raw_parts(ptr, 1) };
+        //~^ cast_slice_from_raw_parts
+        let _: *mut [u8] = unsafe { core::ptr::slice_from_raw_parts_mut(mptr, 1) };
+        //~^ cast_slice_from_raw_parts
+        require_raw_slice_ptr(unsafe { core::ptr::slice_from_raw_parts(ptr, 1) });
+        //~^ cast_slice_from_raw_parts
+    }
+
+    // implicit cast in const context
+    const {
+        const PTR: *const u8 = core::ptr::null();
+        const MPTR: *mut u8 = core::ptr::null_mut();
+        let _: *const [u8] = unsafe { core::ptr::slice_from_raw_parts(PTR, 1) };
+        //~^ cast_slice_from_raw_parts
+        let _: *mut [u8] = unsafe { core::ptr::slice_from_raw_parts_mut(MPTR, 1) };
+        //~^ cast_slice_from_raw_parts
+        require_raw_slice_ptr(unsafe { core::ptr::slice_from_raw_parts(PTR, 1) });
+        //~^ cast_slice_from_raw_parts
+    };
+}
diff --git a/tests/ui/cast_raw_slice_pointer_cast_no_std.rs b/tests/ui/cast_raw_slice_pointer_cast_no_std.rs
new file mode 100644
index 00000000000..743e44c97dc
--- /dev/null
+++ b/tests/ui/cast_raw_slice_pointer_cast_no_std.rs
@@ -0,0 +1,55 @@
+#![warn(clippy::cast_slice_from_raw_parts)]
+#![no_std]
+#![crate_type = "lib"]
+
+const fn require_raw_slice_ptr<T>(_: *const [T]) {}
+
+fn main() {
+    let mut arr = [0u8; 1];
+    let ptr: *const u8 = arr.as_ptr();
+    let mptr = arr.as_mut_ptr();
+    let _: *const [u8] = unsafe { core::slice::from_raw_parts(ptr, 1) as *const [u8] };
+    //~^ cast_slice_from_raw_parts
+    let _: *const [u8] = unsafe { core::slice::from_raw_parts_mut(mptr, 1) as *mut [u8] };
+    //~^ cast_slice_from_raw_parts
+    let _: *const [u8] = unsafe { core::slice::from_raw_parts(ptr, 1) } as *const [u8];
+    //~^ cast_slice_from_raw_parts
+    {
+        use core::slice;
+        let _: *const [u8] = unsafe { slice::from_raw_parts(ptr, 1) } as *const [u8];
+        //~^ cast_slice_from_raw_parts
+        use slice as one;
+        let _: *const [u8] = unsafe { one::from_raw_parts(ptr, 1) } as *const [u8];
+        //~^ cast_slice_from_raw_parts
+    }
+    {
+        use core::slice;
+        let _: *const [u8] = unsafe { slice::from_raw_parts(ptr, 1) } as *const [u8];
+        //~^ cast_slice_from_raw_parts
+        use slice as one;
+        let _: *const [u8] = unsafe { one::from_raw_parts(ptr, 1) } as *const [u8];
+        //~^ cast_slice_from_raw_parts
+    }
+
+    // implicit cast
+    {
+        let _: *const [u8] = unsafe { core::slice::from_raw_parts(ptr, 1) };
+        //~^ cast_slice_from_raw_parts
+        let _: *mut [u8] = unsafe { core::slice::from_raw_parts_mut(mptr, 1) };
+        //~^ cast_slice_from_raw_parts
+        require_raw_slice_ptr(unsafe { core::slice::from_raw_parts(ptr, 1) });
+        //~^ cast_slice_from_raw_parts
+    }
+
+    // implicit cast in const context
+    const {
+        const PTR: *const u8 = core::ptr::null();
+        const MPTR: *mut u8 = core::ptr::null_mut();
+        let _: *const [u8] = unsafe { core::slice::from_raw_parts(PTR, 1) };
+        //~^ cast_slice_from_raw_parts
+        let _: *mut [u8] = unsafe { core::slice::from_raw_parts_mut(MPTR, 1) };
+        //~^ cast_slice_from_raw_parts
+        require_raw_slice_ptr(unsafe { core::slice::from_raw_parts(PTR, 1) });
+        //~^ cast_slice_from_raw_parts
+    };
+}
diff --git a/tests/ui/cast_raw_slice_pointer_cast_no_std.stderr b/tests/ui/cast_raw_slice_pointer_cast_no_std.stderr
new file mode 100644
index 00000000000..5488fbcfa1c
--- /dev/null
+++ b/tests/ui/cast_raw_slice_pointer_cast_no_std.stderr
@@ -0,0 +1,83 @@
+error: casting the result of `from_raw_parts` to *const [u8]
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:11:35
+   |
+LL |     let _: *const [u8] = unsafe { core::slice::from_raw_parts(ptr, 1) as *const [u8] };
+   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+   |
+   = note: `-D clippy::cast-slice-from-raw-parts` implied by `-D warnings`
+   = help: to override `-D warnings` add `#[allow(clippy::cast_slice_from_raw_parts)]`
+
+error: casting the result of `from_raw_parts_mut` to *mut [u8]
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:13:35
+   |
+LL |     let _: *const [u8] = unsafe { core::slice::from_raw_parts_mut(mptr, 1) as *mut [u8] };
+   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts_mut(mptr, 1)`
+
+error: casting the result of `from_raw_parts` to *const [u8]
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:15:26
+   |
+LL |     let _: *const [u8] = unsafe { core::slice::from_raw_parts(ptr, 1) } as *const [u8];
+   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+
+error: casting the result of `from_raw_parts` to *const [u8]
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:19:30
+   |
+LL |         let _: *const [u8] = unsafe { slice::from_raw_parts(ptr, 1) } as *const [u8];
+   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+
+error: casting the result of `from_raw_parts` to *const [u8]
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:22:30
+   |
+LL |         let _: *const [u8] = unsafe { one::from_raw_parts(ptr, 1) } as *const [u8];
+   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+
+error: casting the result of `from_raw_parts` to *const [u8]
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:27:30
+   |
+LL |         let _: *const [u8] = unsafe { slice::from_raw_parts(ptr, 1) } as *const [u8];
+   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+
+error: casting the result of `from_raw_parts` to *const [u8]
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:30:30
+   |
+LL |         let _: *const [u8] = unsafe { one::from_raw_parts(ptr, 1) } as *const [u8];
+   |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+
+error: implicitly casting the result of `from_raw_parts` to `*const [u8]`
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:36:39
+   |
+LL |         let _: *const [u8] = unsafe { core::slice::from_raw_parts(ptr, 1) };
+   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+
+error: implicitly casting the result of `from_raw_parts_mut` to `*mut [u8]`
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:38:37
+   |
+LL |         let _: *mut [u8] = unsafe { core::slice::from_raw_parts_mut(mptr, 1) };
+   |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `core::ptr::slice_from_raw_parts_mut(mptr, 1)`
+
+error: implicitly casting the result of `from_raw_parts` to `*const [u8]`
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:40:40
+   |
+LL |         require_raw_slice_ptr(unsafe { core::slice::from_raw_parts(ptr, 1) });
+   |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `core::ptr::slice_from_raw_parts(ptr, 1)`
+
+error: implicitly casting the result of `from_raw_parts` to `*const [u8]`
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:48:39
+   |
+LL |         let _: *const [u8] = unsafe { core::slice::from_raw_parts(PTR, 1) };
+   |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `core::ptr::slice_from_raw_parts(PTR, 1)`
+
+error: implicitly casting the result of `from_raw_parts_mut` to `*mut [u8]`
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:50:37
+   |
+LL |         let _: *mut [u8] = unsafe { core::slice::from_raw_parts_mut(MPTR, 1) };
+   |                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `core::ptr::slice_from_raw_parts_mut(MPTR, 1)`
+
+error: implicitly casting the result of `from_raw_parts` to `*const [u8]`
+  --> tests/ui/cast_raw_slice_pointer_cast_no_std.rs:52:40
+   |
+LL |         require_raw_slice_ptr(unsafe { core::slice::from_raw_parts(PTR, 1) });
+   |                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace_with: `core::ptr::slice_from_raw_parts(PTR, 1)`
+
+error: aborting due to 13 previous errors
+