[stable] Prepare Rust 1.91.1

RELEASES.md

@@ -1,3 +1,11 @@
+Version 1.91.1 (2025-11-10)
+===========================
+
+<a id="1.91.1"></a>
+
+- [Enable file locking support in illumos](https://github.com/rust-lang/rust/pull/148322). This fixes Cargo not locking the build directory on illumos.
+- [Fix `wasm_import_module` attribute cross-crate](https://github.com/rust-lang/rust/pull/148363). This fixes linker errors on WASM targets.
+
 Version 1.91.0 (2025-10-30)
 ==========================
 

compiler/rustc_symbol_mangling/src/lib.rs

@@ -228,7 +228,7 @@ fn compute_symbol_name<'tcx>(
         // However, we don't have the wasm import module map there yet.
         tcx.is_foreign_item(def_id)
             && tcx.sess.target.is_like_wasm
-            && tcx.wasm_import_module_map(LOCAL_CRATE).contains_key(&def_id.into())
+            && tcx.wasm_import_module_map(def_id.krate).contains_key(&def_id.into())
     };
 
     if !wasm_import_module_exception_force_mangling {

library/std/src/fs/tests.rs

@@ -5,6 +5,7 @@ use rand::RngCore;
     target_os = "freebsd",
     target_os = "linux",
     target_os = "netbsd",
+    target_os = "illumos",
     target_vendor = "apple",
 ))]
 use crate::assert_matches::assert_matches;
@@ -14,6 +15,7 @@ use crate::char::MAX_LEN_UTF8;
     target_os = "freebsd",
     target_os = "linux",
     target_os = "netbsd",
+    target_os = "illumos",
     target_vendor = "apple",
 ))]
 use crate::fs::TryLockError;
@@ -227,6 +229,7 @@ fn file_test_io_seek_and_write() {
     target_os = "linux",
     target_os = "netbsd",
     target_os = "solaris",
+    target_os = "illumos",
     target_vendor = "apple",
 ))]
 fn file_lock_multiple_shared() {
@@ -251,6 +254,7 @@ fn file_lock_multiple_shared() {
     target_os = "linux",
     target_os = "netbsd",
     target_os = "solaris",
+    target_os = "illumos",
     target_vendor = "apple",
 ))]
 fn file_lock_blocking() {
@@ -276,6 +280,7 @@ fn file_lock_blocking() {
     target_os = "linux",
     target_os = "netbsd",
     target_os = "solaris",
+    target_os = "illumos",
     target_vendor = "apple",
 ))]
 fn file_lock_drop() {
@@ -298,6 +303,7 @@ fn file_lock_drop() {
     target_os = "linux",
     target_os = "netbsd",
     target_os = "solaris",
+    target_os = "illumos",
     target_vendor = "apple",
 ))]
 fn file_lock_dup() {

library/std/src/sys/fs/unix.rs

@@ -1286,6 +1286,7 @@ impl File {
         target_os = "netbsd",
         target_os = "openbsd",
         target_os = "cygwin",
+        target_os = "illumos",
         target_vendor = "apple",
     ))]
     pub fn lock(&self) -> io::Result<()> {
@@ -1310,6 +1311,7 @@ impl File {
         target_os = "openbsd",
         target_os = "cygwin",
         target_os = "solaris",
+        target_os = "illumos",
         target_vendor = "apple",
     )))]
     pub fn lock(&self) -> io::Result<()> {
@@ -1323,6 +1325,7 @@ impl File {
         target_os = "netbsd",
         target_os = "openbsd",
         target_os = "cygwin",
+        target_os = "illumos",
         target_vendor = "apple",
     ))]
     pub fn lock_shared(&self) -> io::Result<()> {
@@ -1347,6 +1350,7 @@ impl File {
         target_os = "openbsd",
         target_os = "cygwin",
         target_os = "solaris",
+        target_os = "illumos",
         target_vendor = "apple",
     )))]
     pub fn lock_shared(&self) -> io::Result<()> {
@@ -1360,6 +1364,7 @@ impl File {
         target_os = "netbsd",
         target_os = "openbsd",
         target_os = "cygwin",
+        target_os = "illumos",
         target_vendor = "apple",
     ))]
     pub fn try_lock(&self) -> Result<(), TryLockError> {
@@ -1400,6 +1405,7 @@ impl File {
         target_os = "openbsd",
         target_os = "cygwin",
         target_os = "solaris",
+        target_os = "illumos",
         target_vendor = "apple",
     )))]
     pub fn try_lock(&self) -> Result<(), TryLockError> {
@@ -1416,6 +1422,7 @@ impl File {
         target_os = "netbsd",
         target_os = "openbsd",
         target_os = "cygwin",
+        target_os = "illumos",
         target_vendor = "apple",
     ))]
     pub fn try_lock_shared(&self) -> Result<(), TryLockError> {
@@ -1456,6 +1463,7 @@ impl File {
         target_os = "openbsd",
         target_os = "cygwin",
         target_os = "solaris",
+        target_os = "illumos",
         target_vendor = "apple",
     )))]
     pub fn try_lock_shared(&self) -> Result<(), TryLockError> {
@@ -1472,6 +1480,7 @@ impl File {
         target_os = "netbsd",
         target_os = "openbsd",
         target_os = "cygwin",
+        target_os = "illumos",
         target_vendor = "apple",
     ))]
     pub fn unlock(&self) -> io::Result<()> {
@@ -1496,6 +1505,7 @@ impl File {
         target_os = "openbsd",
         target_os = "cygwin",
         target_os = "solaris",
+        target_os = "illumos",
         target_vendor = "apple",
     )))]
     pub fn unlock(&self) -> io::Result<()> {

src/version

@@ -1 +1 @@
-1.91.0
+1.91.1

tests/ui/wasm/auxiliary/link-name-in-foreign-crate.rs

@@ -0,0 +1,7 @@
+#![no_std]
+
+#[link(wasm_import_module = "test")]
+unsafe extern "C" {
+    #[link_name = "close"]
+    pub fn close(x: u32) -> u32;
+}

tests/ui/wasm/wasm-link-name-in-foreign-crate-respected.rs

@@ -0,0 +1,22 @@
+//@ only-wasm32
+//@ aux-build:link-name-in-foreign-crate.rs
+//@ compile-flags: --crate-type cdylib
+//@ build-pass
+//@ no-prefer-dynamic
+
+extern crate link_name_in_foreign_crate;
+
+// This test that the definition of a function named `close`, which collides
+// with the `close` function in libc in theory, is handled correctly in
+// cross-crate situations. The `link_name_in_foreign_crate` dependency declares
+// `close` from a non-`env` wasm import module and then this crate attempts to
+// use the symbol. This should properly ensure that the wasm module name is
+// tagged as `test` and the `close` symbol, to LLD, is mangled, to avoid
+// colliding with the `close` symbol in libc itself.
+
+#[unsafe(no_mangle)]
+pub extern "C" fn foo() {
+    unsafe {
+        link_name_in_foreign_crate::close(1);
+    }
+}