rustc-1.29.0-src.patch


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

--- src/libcore/intrinsics.rs
+++ src/libcore/intrinsics.rs
@@ -678,5 +678,9 @@
     pub fn min_align_of_val<T: ?Sized>(_: &T) -> usize;
 
+    /// Obtain the length of a slice pointer
+    #[cfg(rust_compiler="mrustc")]
+    pub fn mrustc_slice_len<T>(pointer: *const [T]) -> usize;
+
     /// Gets a static string slice containing the name of a type.
     pub fn type_name<T: ?Sized>() -> &'static str;

--- src/libcore/slice/mod.rs
+++ src/libcore/slice/mod.rs
@@ -413,5 +413,7 @@
     pub const fn len(&self) -> usize {
-        unsafe {
-            Repr { rust: self }.raw.len
-        }
+        #[cfg(not(rust_compiler="mrustc"))]
+        let rv = unsafe { Repr { rust: self }.raw.len };
+        #[cfg(rust_compiler="mrustc")]
+        let rv = unsafe { ::intrinsics::mrustc_slice_len(self) };
+        rv
     }