[INFO] fetching crate data-streams 2.0.0...
[INFO] testing data-streams-2.0.0 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate data-streams 2.0.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate data-streams 2.0.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate data-streams 2.0.0
[INFO] tweaked toml for crates.io crate data-streams 2.0.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate data-streams 2.0.0 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate data-streams 2.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fastrand v2.1.0
[INFO] [stderr]   Downloaded wit-bindgen-rt v0.39.0
[INFO] [stderr]   Downloaded errno v0.3.9
[INFO] [stderr]   Downloaded rusty-fork v0.3.0
[INFO] [stderr]   Downloaded bitflags v2.9.1
[INFO] [stderr]   Downloaded tempfile v3.10.1
[INFO] [stderr]   Downloaded proc-macro2 v1.0.86
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.18
[INFO] [stderr]   Downloaded getrandom v0.3.3
[INFO] [stderr]   Downloaded zerocopy v0.6.6
[INFO] [stderr]   Downloaded wasi v0.14.2+wasi-0.2.4
[INFO] [stderr]   Downloaded proptest v1.7.0
[INFO] [stderr]   Downloaded rustix v0.38.34
[INFO] [stderr]   Downloaded syn v2.0.72
[INFO] [stderr]   Downloaded regex-syntax v0.8.4
[INFO] [stderr]   Downloaded zerocopy-derive v0.6.6
[INFO] [stderr]   Downloaded libc v0.2.155
[INFO] [stderr]   Downloaded linux-raw-sys v0.4.14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9
[INFO] running `Command { std: "docker" "start" "6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling bytemuck v1.23.1
[INFO] [stderr]    Compiling simdutf8 v0.1.5
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling data-streams v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1113:2
[INFO] [stdout]      |
[INFO] [stdout] 1113 |     default fn available(&self) -> usize {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1117:2
[INFO] [stdout]      |
[INFO] [stdout] 1117 |     default fn request(&mut self, count: usize) -> Result<bool> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1121:2
[INFO] [stdout]      |
[INFO] [stdout] 1121 |     default fn skip(&mut self, count: usize) -> Result<usize> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1125:2
[INFO] [stdout]      |
[INFO] [stdout] 1125 |     default fn read_bytes<'a>(&mut self, buf: &'a mut [u8]) -> Result<&'a [u8]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1135:2
[INFO] [stdout]      |
[INFO] [stdout] 1135 |     default fn read_exact_bytes<'a>(&mut self, buf: &'a mut [u8]) -> Result<&'a [u8]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1154:2
[INFO] [stdout]      |
[INFO] [stdout] 1154 |     default fn read_aligned_bytes<'a>(&mut self, buf: &'a mut [u8], alignment: usize) -> Result<&'a [u8]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1175:2
[INFO] [stdout]      |
[INFO] [stdout] 1175 |     default fn read_utf8<'a>(&mut self, buf: &'a mut [u8]) -> Result<&'a str> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1199:2
[INFO] [stdout]      |
[INFO] [stdout] 1199 |     default fn read_utf8_codepoint(&mut self, buf: &mut [u8; 4]) -> Result<char> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1212:2
[INFO] [stdout]      |
[INFO] [stdout] 1212 |     default fn read_ascii<'a>(&mut self, buf: &'a mut [u8]) -> Result<&'a [ascii::Char]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1219:2
[INFO] [stdout]      |
[INFO] [stdout] 1219 |     default fn read_to_end<'a>(&mut self, buf: &'a mut alloc::vec::Vec<u8>) -> Result<&'a [u8]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1224:2
[INFO] [stdout]      |
[INFO] [stdout] 1224 |     default fn read_utf8_to_end<'a>(&mut self, buf: &'a mut alloc::string::String) -> Result<&'a str> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]   --> src/source/impls.rs:50:3
[INFO] [stdout]    |
[INFO] [stdout] 50 |         default fn size_hint(&self) -> Option<u64> { None }
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]    = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/sink.rs:857:2
[INFO] [stdout]     |
[INFO] [stdout] 857 |     default fn write_owned_bytes(&mut self, buf: Vec<u8>) -> Result {
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/sink.rs:862:2
[INFO] [stdout]     |
[INFO] [stdout] 862 |     default fn write_owned_utf8(&mut self, buf: String) -> Result {
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 2.62s
[INFO] running `Command { std: "docker" "inspect" "6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling getrandom v0.3.3
[INFO] [stderr]    Compiling rustix v0.38.34
[INFO] [stderr]    Compiling linux-raw-sys v0.4.14
[INFO] [stderr]    Compiling bitflags v2.9.1
[INFO] [stderr]    Compiling fastrand v2.1.0
[INFO] [stderr]    Compiling bit-vec v0.8.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling unarray v0.1.4
[INFO] [stderr]    Compiling regex-syntax v0.8.4
[INFO] [stderr]    Compiling lazy_static v1.5.0
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1113:2
[INFO] [stdout]      |
[INFO] [stdout] 1113 |     default fn available(&self) -> usize {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1117:2
[INFO] [stdout]      |
[INFO] [stdout] 1117 |     default fn request(&mut self, count: usize) -> Result<bool> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1121:2
[INFO] [stdout]      |
[INFO] [stdout] 1121 |     default fn skip(&mut self, count: usize) -> Result<usize> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1125:2
[INFO] [stdout]      |
[INFO] [stdout] 1125 |     default fn read_bytes<'a>(&mut self, buf: &'a mut [u8]) -> Result<&'a [u8]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1135:2
[INFO] [stdout]      |
[INFO] [stdout] 1135 |     default fn read_exact_bytes<'a>(&mut self, buf: &'a mut [u8]) -> Result<&'a [u8]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1154:2
[INFO] [stdout]      |
[INFO] [stdout] 1154 |     default fn read_aligned_bytes<'a>(&mut self, buf: &'a mut [u8], alignment: usize) -> Result<&'a [u8]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1175:2
[INFO] [stdout]      |
[INFO] [stdout] 1175 |     default fn read_utf8<'a>(&mut self, buf: &'a mut [u8]) -> Result<&'a str> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1199:2
[INFO] [stdout]      |
[INFO] [stdout] 1199 |     default fn read_utf8_codepoint(&mut self, buf: &mut [u8; 4]) -> Result<char> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1212:2
[INFO] [stdout]      |
[INFO] [stdout] 1212 |     default fn read_ascii<'a>(&mut self, buf: &'a mut [u8]) -> Result<&'a [ascii::Char]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1219:2
[INFO] [stdout]      |
[INFO] [stdout] 1219 |     default fn read_to_end<'a>(&mut self, buf: &'a mut alloc::vec::Vec<u8>) -> Result<&'a [u8]> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]     --> src/source.rs:1224:2
[INFO] [stdout]      |
[INFO] [stdout] 1224 |     default fn read_utf8_to_end<'a>(&mut self, buf: &'a mut alloc::string::String) -> Result<&'a str> {
[INFO] [stdout]      |     ^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]      = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]      = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]   --> src/source/impls.rs:50:3
[INFO] [stdout]    |
[INFO] [stdout] 50 |         default fn size_hint(&self) -> Option<u64> { None }
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]    = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]    = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/sink.rs:857:2
[INFO] [stdout]     |
[INFO] [stdout] 857 |     default fn write_owned_bytes(&mut self, buf: Vec<u8>) -> Result {
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: specialization is experimental
[INFO] [stdout]    --> src/sink.rs:862:2
[INFO] [stdout]     |
[INFO] [stdout] 862 |     default fn write_owned_utf8(&mut self, buf: String) -> Result {
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = warning: unstable syntax can change at any point in the future, causing a hard error!
[INFO] [stdout]     = note: for more information, see issue #154045 <https://github.com/rust-lang/rust/issues/154045>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling bit-set v0.8.0
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling syn v2.0.72
[INFO] [stderr]    Compiling wait-timeout v0.2.0
[INFO] [stderr]    Compiling rand_core v0.9.3
[INFO] [stderr]    Compiling rand v0.9.2
[INFO] [stderr]    Compiling rand_xorshift v0.4.0
[INFO] [stderr]    Compiling tempfile v3.10.1
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling zerocopy-derive v0.6.6
[INFO] [stderr]    Compiling zerocopy v0.6.6
[INFO] [stderr]    Compiling ppv-lite86 v0.2.18
[INFO] [stderr]    Compiling rand_chacha v0.9.0
[INFO] [stderr]    Compiling proptest v1.7.0
[INFO] [stderr]    Compiling data-streams v2.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:84:19
[INFO] [stdout]    |
[INFO] [stdout] 84 | #![cfg_attr(test, feature(assert_matches))]
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `assert_matches` has been stable since 1.96.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:84:27
[INFO] [stdout]    |
[INFO] [stdout] 84 | #![cfg_attr(test, feature(assert_matches))]
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `data-streams` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9", kill_on_drop: false }`
[INFO] [stdout] 6180d9489ef41c99376e80f0fe73250390d21c1a5127efb9d18c64a7f7b298e9
