rust-lang · tgross35 · Sep 16, 2025 · Sep 18, 2025 · Sep 18, 2025 · Sep 18, 2025
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
@@ -174,11 +174,11 @@ jobs:
 
   test_tier2:
     name: Test tier2
-    needs: [test_tier1, style_check]
+    # needs: [test_tier1, style_check]
     runs-on: ubuntu-24.04
     strategy:
-      fail-fast: true
-      max-parallel: 12
+      fail-fast: false
+      max-parallel: 30
       matrix:
         target:
           # FIXME(sparc): this takes much longer to run than any other job, put
@@ -279,10 +279,10 @@ jobs:
 
   test_tier2_vm:
     name: Test tier2 VM
-    needs: [test_tier1, style_check]
+    # needs: [test_tier1, style_check]
     runs-on: ubuntu-latest
     strategy:
-      fail-fast: true
+      fail-fast: false
       matrix:
         target:
           - x86_64-pc-solaris

diff --git a/ci/docker/aarch64-linux-android/Dockerfile b/ci/docker/aarch64-linux-android/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN dpkg --add-architecture i386
 RUN apt-get update

diff --git a/ci/docker/aarch64-unknown-linux-gnu/Dockerfile b/ci/docker/aarch64-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc libc6-dev ca-certificates \

diff --git a/ci/docker/aarch64-unknown-linux-musl/Dockerfile b/ci/docker/aarch64-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates \

diff --git a/ci/docker/arm-linux-androideabi/Dockerfile b/ci/docker/arm-linux-androideabi/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN dpkg --add-architecture i386
 RUN apt-get update

diff --git a/ci/docker/asmjs-unknown-emscripten/Dockerfile b/ci/docker/asmjs-unknown-emscripten/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 # This is a workaround to avoid the interaction with tzdata.
 ENV DEBIAN_FRONTEND=noninteractive
@@ -12,7 +12,6 @@ RUN apt-get install -y --no-install-recommends \
     gcc \
     git \
     libc6-dev \
-    libxml2 \
     python3 \
     xz-utils \
     bzip2

diff --git a/ci/docker/i686-linux-android/Dockerfile b/ci/docker/i686-linux-android/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN dpkg --add-architecture i386
 RUN apt-get update

diff --git a/ci/docker/loongarch64-unknown-linux-gnu/Dockerfile b/ci/docker/loongarch64-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

diff --git a/ci/docker/loongarch64-unknown-linux-musl/Dockerfile b/ci/docker/loongarch64-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates curl gcc gcc-14-loongarch64-linux-gnu git libc6-dev \

diff --git a/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile b/ci/docker/powerpc64-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

diff --git a/ci/docker/powerpc64le-unknown-linux-gnu/Dockerfile b/ci/docker/powerpc64le-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

diff --git a/ci/docker/powerpc64le-unknown-linux-musl/Dockerfile b/ci/docker/powerpc64le-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc make libc6-dev git curl ca-certificates \

diff --git a/ci/docker/riscv64gc-unknown-linux-gnu/Dockerfile b/ci/docker/riscv64gc-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         gcc libc6-dev qemu-user ca-certificates \

diff --git a/ci/docker/s390x-unknown-linux-gnu/Dockerfile b/ci/docker/s390x-unknown-linux-gnu/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         curl ca-certificates \

diff --git a/ci/docker/s390x-unknown-linux-musl/Dockerfile b/ci/docker/s390x-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         curl ca-certificates \

diff --git a/ci/docker/sparc64-unknown-linux-gnu/Dockerfile b/ci/docker/sparc64-unknown-linux-gnu/Dockerfile
@@ -1,10 +1,10 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && apt-get install -y --no-install-recommends \
         curl ca-certificates \
         gcc libc6-dev \
         gcc-sparc64-linux-gnu libc6-dev-sparc64-cross \
-        qemu-system-sparc64 openbios-sparc seabios ipxe-qemu \
+        qemu-system-sparc64 seabios ipxe-qemu \
         p7zip-full cpio linux-libc-dev-sparc64-cross qemu-user
 
 COPY linux-sparc64.sh /

diff --git a/ci/docker/wasm32-unknown-emscripten/Dockerfile b/ci/docker/wasm32-unknown-emscripten/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 # This is a workaround to avoid the interaction with tzdata.
 ENV DEBIAN_FRONTEND=noninteractive
@@ -15,7 +15,6 @@ RUN apt-get install -y --no-install-recommends \
     gcc \
     git \
     libc6-dev \
-    libxml2 \
     python3 \
     cmake \
     sudo \

diff --git a/ci/docker/wasm32-wasip1/Dockerfile b/ci/docker/wasm32-wasip1/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 COPY wasi.sh /
 RUN /wasi.sh

diff --git a/ci/docker/wasm32-wasip2/Dockerfile b/ci/docker/wasm32-wasip2/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 COPY wasi.sh /
 RUN /wasi.sh

diff --git a/ci/docker/x86_64-linux-android/Dockerfile b/ci/docker/x86_64-linux-android/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \

diff --git a/ci/docker/x86_64-unknown-linux-gnu/Dockerfile b/ci/docker/x86_64-unknown-linux-gnu/Dockerfile
@@ -1,8 +1,8 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \
-  gcc g++ libc6-dev ca-certificates linux-headers-generic
+    gcc g++ libc6-dev ca-certificates linux-headers-generic
 
 RUN apt search linux-headers
 RUN ls /usr/src

diff --git a/ci/docker/x86_64-unknown-linux-gnux32/Dockerfile b/ci/docker/x86_64-unknown-linux-gnux32/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \

diff --git a/ci/docker/x86_64-unknown-linux-musl/Dockerfile b/ci/docker/x86_64-unknown-linux-musl/Dockerfile
@@ -1,4 +1,4 @@
-FROM ubuntu:24.10
+FROM ubuntu:25.10
 
 RUN apt-get update
 RUN apt-get install -y --no-install-recommends \

diff --git a/ci/install-musl.sh b/ci/install-musl.sh
@@ -20,6 +20,13 @@ musl="musl-${musl_version}"
 curl --retry 5 "https://www.musl-libc.org/releases/${musl}.tar.gz" | tar xzf -
 
 cd "$musl"
+
+if [ "$musl_version" = "1.1.24" ]; then
+    curl --retry 5 \
+        https://github.com/kraj/musl/commit/725e17ed6dff4d0cd22487bb64470881e86a92e7.patch |
+        patch
+fi
+
 case ${1} in
     aarch64)
         musl_arch=aarch64

diff --git a/ci/linux-sparc64.sh b/ci/linux-sparc64.sh
@@ -5,7 +5,7 @@ set -eux
 mkdir -m 777 /qemu
 cd /qemu
 
-curl --retry 5 -LO https://cdimage.debian.org/cdimage/ports/snapshots/2024-12-24/debian-12.0.0-sparc64-NETINST-1.iso
+curl --retry 5 -LO https://cdimage.debian.org/cdimage/ports/snapshots/2025-08-29/debian-12.0.0-sparc64-NETINST-1.iso
 7z e debian-12.0.0-sparc64-NETINST-1.iso install/initrd.gz
 7z e debian-12.0.0-sparc64-NETINST-1.iso install/vmlinux
 mv vmlinux kernel

diff --git a/libc-test/build.rs b/libc-test/build.rs
@@ -4095,6 +4095,49 @@ fn test_linux(target: &str) {
 
     cfg.skip_const(move |constant| {
         let name = constant.ident();
+        if gnu {
+            // FIXME(#4692): these values changed in glibc 2.42. We can't update unless we also
+            // switch to the new symbols.
+            let baud_mismatch = [
+                "SW_MAX",
+                "SW_CNT",
+                "EXTA",
+                "EXTB",
+                "B50",
+                "B75",
+                "B110",
+                "B134",
+                "B150",
+                "B200",
+                "B300",
+                "B600",
+                "B1200",
+                "B1800",
+                "B2400",
+                "B4800",
+                "B9600",
+                "B19200",
+                "B38400",
+                "B57600",
+                "B115200",
+                "B230400",
+                "B460800",
+                "B500000",
+                "B576000",
+                "B921600",
+                "B1000000",
+                "B1152000",
+                "B1500000",
+                "B2000000",
+                "B2500000",
+                "B3000000",
+                "B3500000",
+                "B4000000"
+            ];
+            if baud_mismatch.contains(&name) {
+                return true;
+            }
+        }
         if !gnu {
             // Skip definitions from the kernel on non-glibc Linux targets.
             // They're libc-independent, so we only need to check them on one

diff --git a/src/fuchsia/mod.rs b/src/fuchsia/mod.rs
@@ -2356,7 +2356,7 @@ pub const ST_NOATIME: c_ulong = 1024;
 pub const ST_NODIRATIME: c_ulong = 2048;
 
 pub const RTLD_NEXT: *mut c_void = -1i64 as *mut c_void;
-pub const RTLD_DEFAULT: *mut c_void = 0i64 as *mut c_void;
+pub const RTLD_DEFAULT: *mut c_void = ptr::null_mut();
 pub const RTLD_NODELETE: c_int = 0x1000;
 pub const RTLD_NOW: c_int = 0x2;
 
@@ -2500,7 +2500,7 @@ pub const EFD_SEMAPHORE: c_int = 0x1;
 
 pub const LOG_NFACILITIES: c_int = 24;
 
-pub const SEM_FAILED: *mut crate::sem_t = 0 as *mut sem_t;
+pub const SEM_FAILED: *mut crate::sem_t = ptr::null_mut();
 
 pub const RB_AUTOBOOT: c_int = 0x01234567u32 as i32;
 pub const RB_HALT_SYSTEM: c_int = 0xcdef0123u32 as i32;

diff --git a/src/macros.rs b/src/macros.rs
@@ -82,7 +82,7 @@ macro_rules! prelude {
             #[allow(unused_imports)]
             pub(crate) use ::core::prelude::v1::derive;
             #[allow(unused_imports)]
-            pub(crate) use ::core::{fmt, hash, iter, mem};
+            pub(crate) use ::core::{fmt, hash, iter, mem, ptr};
             #[allow(unused_imports)]
             pub(crate) use mem::{align_of, align_of_val, size_of, size_of_val};
 

diff --git a/src/unix/bsd/freebsdlike/mod.rs b/src/unix/bsd/freebsdlike/mod.rs
@@ -1197,9 +1197,9 @@ pub const _SC_RAW_SOCKETS: c_int = 119;
 pub const _SC_SYMLOOP_MAX: c_int = 120;
 pub const _SC_PHYS_PAGES: c_int = 121;
 
-pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = 0 as *mut _;
-pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = 0 as *mut _;
-pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = 0 as *mut _;
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = ptr::null_mut();
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = ptr::null_mut();
+pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = ptr::null_mut();
 pub const PTHREAD_MUTEX_ERRORCHECK: c_int = 1;
 pub const PTHREAD_MUTEX_RECURSIVE: c_int = 2;
 pub const PTHREAD_MUTEX_NORMAL: c_int = 3;
@@ -1331,7 +1331,7 @@ pub const B230400: speed_t = 230400;
 pub const EXTA: speed_t = 19200;
 pub const EXTB: speed_t = 38400;
 
-pub const SEM_FAILED: *mut sem_t = 0 as *mut sem_t;
+pub const SEM_FAILED: *mut sem_t = ptr::null_mut();
 
 pub const CRTSCTS: crate::tcflag_t = 0x00030000;
 pub const CCTS_OFLOW: crate::tcflag_t = 0x00010000;

diff --git a/src/unix/bsd/netbsdlike/mod.rs b/src/unix/bsd/netbsdlike/mod.rs
@@ -650,7 +650,7 @@ pub const B230400: speed_t = 230400;
 pub const EXTA: speed_t = 19200;
 pub const EXTB: speed_t = 38400;
 
-pub const SEM_FAILED: *mut sem_t = 0 as *mut sem_t;
+pub const SEM_FAILED: *mut sem_t = ptr::null_mut();
 
 pub const CRTSCTS: crate::tcflag_t = 0x00010000;
 pub const CRTS_IFLOW: crate::tcflag_t = CRTSCTS;

diff --git a/src/unix/bsd/netbsdlike/openbsd/mod.rs b/src/unix/bsd/netbsdlike/openbsd/mod.rs
@@ -1321,9 +1321,9 @@ pub const SCHED_RR: c_int = 3;
 
 pub const ST_NOSUID: c_ulong = 2;
 
-pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = 0 as *mut _;
-pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = 0 as *mut _;
-pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = 0 as *mut _;
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = ptr::null_mut();
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = ptr::null_mut();
+pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = ptr::null_mut();
 
 pub const PTHREAD_MUTEX_ERRORCHECK: c_int = 1;
 pub const PTHREAD_MUTEX_RECURSIVE: c_int = 2;

diff --git a/src/unix/cygwin/mod.rs b/src/unix/cygwin/mod.rs
@@ -1018,7 +1018,7 @@ pub const NGROUPS_MAX: c_int = 1024;
 pub const FORK_RELOAD: c_int = 1;
 pub const FORK_NO_RELOAD: c_int = 0;
 
-pub const RTLD_DEFAULT: *mut c_void = 0isize as *mut c_void;
+pub const RTLD_DEFAULT: *mut c_void = ptr::null_mut();
 pub const RTLD_LOCAL: c_int = 0;
 pub const RTLD_LAZY: c_int = 1;
 pub const RTLD_NOW: c_int = 2;

diff --git a/src/unix/haiku/mod.rs b/src/unix/haiku/mod.rs
@@ -1059,7 +1059,7 @@ pub const FD_SETSIZE: c_int = 1024;
 pub const RTLD_LOCAL: c_int = 0x0;
 pub const RTLD_NOW: c_int = 0x1;
 pub const RTLD_GLOBAL: c_int = 0x2;
-pub const RTLD_DEFAULT: *mut c_void = 0isize as *mut c_void;
+pub const RTLD_DEFAULT: *mut c_void = ptr::null_mut();
 
 pub const BUFSIZ: c_uint = 8192;
 pub const FILENAME_MAX: c_uint = 256;

diff --git a/src/unix/hurd/mod.rs b/src/unix/hurd/mod.rs
@@ -1791,7 +1791,7 @@ pub const RB_DEBUGGER: c_int = 0x1000;
 
 // semaphore.h
 pub const __SIZEOF_SEM_T: usize = 20;
-pub const SEM_FAILED: *mut crate::sem_t = 0 as *mut sem_t;
+pub const SEM_FAILED: *mut crate::sem_t = ptr::null_mut();
 
 // termios.h
 pub const IGNBRK: crate::tcflag_t = 1;
@@ -1962,7 +1962,7 @@ pub const CTIME: u8 = 0;
 pub const CBRK: u8 = 0u8;
 
 // dlfcn.h
-pub const RTLD_DEFAULT: *mut c_void = 0i64 as *mut c_void;
+pub const RTLD_DEFAULT: *mut c_void = ptr::null_mut();
 pub const RTLD_NEXT: *mut c_void = -1i64 as *mut c_void;
 pub const RTLD_LAZY: c_int = 1;
 pub const RTLD_NOW: c_int = 2;

diff --git a/src/unix/linux_like/android/b64/mod.rs b/src/unix/linux_like/android/b64/mod.rs
@@ -225,7 +225,7 @@ pub const SA_SIGINFO: c_int = 0x00000004;
 
 pub const RTLD_GLOBAL: c_int = 0x00100;
 pub const RTLD_NOW: c_int = 2;
-pub const RTLD_DEFAULT: *mut c_void = 0i64 as *mut c_void;
+pub const RTLD_DEFAULT: *mut c_void = ptr::null_mut();
 
 pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
     value: 0,

diff --git a/src/unix/linux_like/android/mod.rs b/src/unix/linux_like/android/mod.rs
@@ -1517,7 +1517,7 @@ pub const ST_RELATIME: c_ulong = 4096;
 pub const RTLD_NOLOAD: c_int = 0x4;
 pub const RTLD_NODELETE: c_int = 0x1000;
 
-pub const SEM_FAILED: *mut sem_t = 0 as *mut sem_t;
+pub const SEM_FAILED: *mut sem_t = ptr::null_mut();
 
 pub const AI_PASSIVE: c_int = 0x00000001;
 pub const AI_CANONNAME: c_int = 0x00000002;