Auto merge of #929 - RalfJung:slice-too-big, r=RalfJung

test too big slice

Test for an upcoming rustc PR.

rust-version

@@ -1 +1 @@
-7445622bcb515c822a2fc6e8c57c90478c1a56bb
+2d851b33181b1404856cb1d8b20d261adda54ffb

tests/compile-fail/slice-too-big.rs

@@ -0,0 +1,7 @@
+use std::mem;
+use std::usize;
+
+fn main() { unsafe {
+    let ptr = Box::into_raw(Box::new(0u8));
+    let _x: &[u8] = mem::transmute((ptr, usize::MAX)); //~ ERROR: invalid slice: total size is bigger than largest supported object
+} }