+#![feature(custom_attribute)]
+#![allow(dead_code, unused_attributes)]
+
+#[miri_run]
+fn overwriting_part_of_relocation_makes_the_rest_undefined() -> i32 {
+ let mut p = &42;
+ unsafe {
+ let ptr: *mut _ = &mut p;
+ *(ptr as *mut u32) = 123;
+ }
+ *p //~ ERROR: attempted to read undefined bytes
+}
+
+#[miri_run]
+fn pointers_to_different_allocations_are_unorderable() -> bool {
+ let x: *const u8 = &1;
+ let y: *const u8 = &2;
+ x < y //~ ERROR: attempted to do math or a comparison on pointers into different allocations
+}
+
+#[miri_run]
+fn invalid_bool() -> u8 {
+ let b = unsafe { std::mem::transmute::<u8, bool>(2) };
+ if b { 1 } else { 2 } //~ ERROR: invalid boolean value read
+}
+
+#[miri_run]
+fn undefined_byte_read() -> u8 {
+ let v: Vec<u8> = Vec::with_capacity(10);
+ let undef = unsafe { *v.get_unchecked(5) };
+ undef + 1 //~ ERROR: attempted to read undefined bytes
+}
+
+#[miri_run]
+fn out_of_bounds_read() -> u8 {
+ let v: Vec<u8> = vec![1, 2];
+ unsafe { *v.get_unchecked(5) } //~ ERROR: pointer offset outside bounds of allocation
+}
+
+#[miri_run]
+fn dangling_pointer_deref() -> i32 {
+ let p = {
+ let b = Box::new(42);
+ &*b as *const i32
+ };
+ unsafe { *p } //~ ERROR: dangling pointer was dereferenced
+}
+
+fn main() {}