Improve miri's error reporting in check_in_alloc

Author: LooMaclin

src/librustc/mir/interpret/allocation.rs

@@ -228,7 +228,7 @@ impl<'tcx, Tag: Copy, Extra> Allocation<Tag, Extra> {
         // FIXME: Working around https://github.com/rust-lang/rust/issues/56209
         where Extra: AllocationExtra<Tag, MemoryExtra>
     {
-        self.get_bytes_internal(cx, ptr, size, true, CheckInAllocMsg::MemoryAccess)
+        self.get_bytes_internal(cx, ptr, size, true, CheckInAllocMsg::MemoryAccessTest)
     }
 
     /// It is the caller's responsibility to handle undefined and pointer bytes.
@@ -243,7 +243,7 @@ impl<'tcx, Tag: Copy, Extra> Allocation<Tag, Extra> {
         // FIXME: Working around https://github.com/rust-lang/rust/issues/56209
         where Extra: AllocationExtra<Tag, MemoryExtra>
     {
-        self.get_bytes_internal(cx, ptr, size, false, CheckInAllocMsg::MemoryAccess)
+        self.get_bytes_internal(cx, ptr, size, false, CheckInAllocMsg::MemoryAccessTest)
     }
 
     /// Just calling this already marks everything as defined and removes relocations,
@@ -258,7 +258,7 @@ impl<'tcx, Tag: Copy, Extra> Allocation<Tag, Extra> {
         where Extra: AllocationExtra<Tag, MemoryExtra>
     {
         assert_ne!(size.bytes(), 0, "0-sized accesses should never even get a `Pointer`");
-        self.check_bounds(cx, ptr, size, CheckInAllocMsg::MemoryAccess)?;
+        self.check_bounds(cx, ptr, size, CheckInAllocMsg::MemoryAccessTest)?;
 
         self.mark_definedness(ptr, size, true)?;
         self.clear_relocations(cx, ptr, size)?;

src/librustc/mir/interpret/error.rs

@@ -461,9 +461,9 @@ impl<'tcx, O: fmt::Debug> fmt::Debug for InterpError<'tcx, O> {
         use self::InterpError::*;
         match *self {
             PointerOutOfBounds { ptr, msg, allocation_size } => {
-                write!(f, "{} test failed: pointer must be in-bounds at offset {}, but is outside bounds of \
-                           allocation {} which has size {}", msg,
-                       ptr.offset.bytes(), ptr.alloc_id, allocation_size.bytes())
+                write!(f, "{} test failed: pointer must be in-bounds at offset {}, \
+                          but is outside bounds of allocation {} which has size {}",
+                    msg, ptr.offset.bytes(), ptr.alloc_id, allocation_size.bytes())
             },
             ValidationFailure(ref err) => {
                 write!(f, "type validation failed: {}", err)