[INFO] fetching crate ppl 0.1.6...
[INFO] testing ppl-0.1.6 against 1.90.0 for beta-1.91-3
[INFO] extracting crate ppl 0.1.6 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate ppl 0.1.6
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate ppl 0.1.6
[INFO] tweaked toml for crates.io crate ppl 0.1.6 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ppl 0.1.6 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ppl 0.1.6 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serial_test v3.2.0
[INFO] [stderr]   Downloaded rand_core v0.9.0
[INFO] [stderr]   Downloaded serial_test_derive v3.2.0
[INFO] [stderr]   Downloaded sdd v0.2.0
[INFO] [stderr]   Downloaded core_affinity v0.8.3
[INFO] [stderr]   Downloaded log v0.4.26
[INFO] [stderr]   Downloaded jobserver v0.1.26
[INFO] [stderr]   Downloaded anstream v0.6.11
[INFO] [stderr]   Downloaded env_logger v0.11.7
[INFO] [stderr]   Downloaded kanal v0.1.0
[INFO] [stderr]   Downloaded jiff-static v0.2.4
[INFO] [stderr]   Downloaded png v0.17.10
[INFO] [stderr]   Downloaded scc v2.1.0
[INFO] [stderr]   Downloaded zerocopy-derive v0.8.14
[INFO] [stderr]   Downloaded ff_buffer v0.1.0
[INFO] [stderr]   Downloaded zerocopy v0.8.14
[INFO] [stderr]   Downloaded exr v1.71.0
[INFO] [stderr]   Downloaded rustix v0.38.15
[INFO] [stderr]   Downloaded jiff v0.2.4
[INFO] [stderr]   Downloaded tiff v0.9.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab2c14224ba50e3cddb5b995bacf0c645a27d72f430b9abc02e3de4f043d9fbe
[INFO] running `Command { std: "docker" "start" "-a" "ab2c14224ba50e3cddb5b995bacf0c645a27d72f430b9abc02e3de4f043d9fbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab2c14224ba50e3cddb5b995bacf0c645a27d72f430b9abc02e3de4f043d9fbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab2c14224ba50e3cddb5b995bacf0c645a27d72f430b9abc02e3de4f043d9fbe", kill_on_drop: false }`
[INFO] [stdout] ab2c14224ba50e3cddb5b995bacf0c645a27d72f430b9abc02e3de4f043d9fbe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,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" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5db482c3f81416ce29ef9f8ef11f55ba447779e4fe79bc20abeb51454ce112b8
[INFO] running `Command { std: "docker" "start" "-a" "5db482c3f81416ce29ef9f8ef11f55ba447779e4fe79bc20abeb51454ce112b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling log v0.4.26
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling core_affinity v0.8.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling crossbeam-channel v0.5.14
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling ppl v0.1.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(unsized_fn_params)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(box_into_inner)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(let_chains)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `let_chains` has been stable since `1.88.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `unsized_fn_params` is internal to the compiler or standard library
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(unsized_fn_params)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: using it is strongly discouraged
[INFO] [stdout]   = note: `#[warn(internal_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `let_chains` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:7:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(let_chains)]
[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 `ppl` (lib) due to 3 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5db482c3f81416ce29ef9f8ef11f55ba447779e4fe79bc20abeb51454ce112b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5db482c3f81416ce29ef9f8ef11f55ba447779e4fe79bc20abeb51454ce112b8", kill_on_drop: false }`
[INFO] [stdout] 5db482c3f81416ce29ef9f8ef11f55ba447779e4fe79bc20abeb51454ce112b8