Auto merge of #127546 - workingjubilee:5-level-paging-exists, r=saethlin

Correct outdated object size limit

The comment here about 48 bit addresses being enough was written in 2016 but was made incorrect in 2019 by 5-level paging, and then persisted for another 5 years before being noticed and corrected.

The bolding of the "exclusive" part is merely to call attention to something I missed when reading it and doublechecking the math.

try-job: i686-msvc
try-job: test-various

Author: bors

tests/fail/type-too-large.stderr

@@ -1,8 +1,8 @@
-error: post-monomorphization error: values of the type `[u8; 2305843011361177600]` are too big for the current architecture
+error: post-monomorphization error: values of the type `[u8; 2305843011361177600]` are too big for the target architecture
   --> tests/fail/type-too-large.rs:LL:CC
    |
 LL |     _fat = [0; (1u64 << 61) as usize + (1u64 << 31) as usize];
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ values of the type `[u8; 2305843011361177600]` are too big for the current architecture
+   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ values of the type `[u8; 2305843011361177600]` are too big for the target architecture
    |
    = note: BACKTRACE:
    = note: inside `main` at tests/fail/type-too-large.rs:LL:CC