Merge pull request #4590 from rust-lang/rustup-2025-09-17

Automatic Rustup

Author: oli-obk

rust-version

@@ -1 +1 @@
-9d82de19dfae60e55c291f5f28e28cfc2c1b9630
+3f1552a273e43e15f6ed240d00e1efdd6a53e65e

tests/fail/both_borrows/issue-miri-1050-1.rs

@@ -1,4 +1,6 @@
 //@revisions: stack tree
+// Ensure this even hits the aliasing model
+//@compile-flags: -Zmiri-disable-validation
 //@[tree]compile-flags: -Zmiri-tree-borrows
 //@error-in-other-file: pointer not dereferenceable
 

tests/fail/both_borrows/issue-miri-1050-2.rs

@@ -1,4 +1,6 @@
 //@revisions: stack tree
+// Ensure this even hits the aliasing model
+//@compile-flags: -Zmiri-disable-validation
 //@[tree]compile-flags: -Zmiri-tree-borrows
 //@error-in-other-file: is a dangling pointer
 use std::ptr::NonNull;

tests/fail/both_borrows/return_invalid_shr.stack.stderr

@@ -11,7 +11,7 @@ help: <TAG> was created by a SharedReadOnly retag at offsets [0x4..0x8]
    |
 LL |     let ret = unsafe { &(*xraw).1 };
    |                        ^^^^^^^^^^
-help: <TAG> was later invalidated at offsets [0x0..0x8] by a write access
+help: <TAG> was later invalidated at offsets [0x4..0x8] by a write access
   --> tests/fail/both_borrows/return_invalid_shr.rs:LL:CC
    |
 LL |     unsafe { *xraw = (42, 23) }; // unfreeze

tests/fail/both_borrows/return_invalid_shr.tree.stderr

@@ -12,7 +12,7 @@ help: the accessed tag <TAG> was created here, in the initial state Frozen
    |
 LL |     let ret = unsafe { &(*xraw).1 };
    |                        ^^^^^^^^^^
-help: the accessed tag <TAG> later transitioned to Disabled due to a foreign write access at offsets [0x0..0x8]
+help: the accessed tag <TAG> later transitioned to Disabled due to a foreign write access at offsets [0x4..0x8]
   --> tests/fail/both_borrows/return_invalid_shr.rs:LL:CC
    |
 LL |     unsafe { *xraw = (42, 23) }; // unfreeze

tests/fail/both_borrows/return_invalid_shr_option.stack.stderr

@@ -14,7 +14,7 @@ help: <TAG> was created by a SharedReadOnly retag at offsets [0x4..0x8]
    |
 LL |     let ret = Some(unsafe { &(*xraw).1 });
    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-help: <TAG> was later invalidated at offsets [0x0..0x8] by a write access
+help: <TAG> was later invalidated at offsets [0x4..0x8] by a write access
   --> tests/fail/both_borrows/return_invalid_shr_option.rs:LL:CC
    |
 LL |     unsafe { *xraw = (42, 23) }; // unfreeze

tests/fail/both_borrows/return_invalid_shr_option.tree.stderr

@@ -12,7 +12,7 @@ help: the accessed tag <TAG> was created here, in the initial state Frozen
    |
 LL |     let ret = Some(unsafe { &(*xraw).1 });
    |               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
-help: the accessed tag <TAG> later transitioned to Disabled due to a foreign write access at offsets [0x0..0x8]
+help: the accessed tag <TAG> later transitioned to Disabled due to a foreign write access at offsets [0x4..0x8]
   --> tests/fail/both_borrows/return_invalid_shr_option.rs:LL:CC
    |
 LL |     unsafe { *xraw = (42, 23) }; // unfreeze

tests/fail/both_borrows/return_invalid_shr_tuple.stack.stderr

@@ -14,7 +14,7 @@ help: <TAG> was created by a SharedReadOnly retag at offsets [0x4..0x8]
    |
 LL |     let ret = (unsafe { &(*xraw).1 },);
    |               ^^^^^^^^^^^^^^^^^^^^^^^^
-help: <TAG> was later invalidated at offsets [0x0..0x8] by a write access
+help: <TAG> was later invalidated at offsets [0x4..0x8] by a write access
   --> tests/fail/both_borrows/return_invalid_shr_tuple.rs:LL:CC
    |
 LL |     unsafe { *xraw = (42, 23) }; // unfreeze

tests/fail/both_borrows/return_invalid_shr_tuple.tree.stderr

@@ -12,7 +12,7 @@ help: the accessed tag <TAG> was created here, in the initial state Frozen
    |
 LL |     let ret = (unsafe { &(*xraw).1 },);
    |               ^^^^^^^^^^^^^^^^^^^^^^^^
-help: the accessed tag <TAG> later transitioned to Disabled due to a foreign write access at offsets [0x0..0x8]
+help: the accessed tag <TAG> later transitioned to Disabled due to a foreign write access at offsets [0x4..0x8]
   --> tests/fail/both_borrows/return_invalid_shr_tuple.rs:LL:CC
    |
 LL |     unsafe { *xraw = (42, 23) }; // unfreeze

tests/fail/overlapping_assignment_aggregate.rs

@@ -0,0 +1,18 @@
+//! This is like `pass/overlapping_assignment_aggregate_scalar.rs` but with a non-scalar
+//! type, and that makes it definite UB.
+#![feature(custom_mir, core_intrinsics)]
+#![allow(internal_features)]
+
+use std::intrinsics::mir::*;
+
+#[custom_mir(dialect = "runtime")]
+fn main() {
+    mir! {
+        let _1: ([u8; 1],);
+        {
+            _1.0 = [0_u8; 1];
+            _1 = (_1.0, ); //~ERROR: overlapping ranges
+            Return()
+        }
+    }
+}