[INFO] cloning repository https://github.com/supersurviveur/formalith
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/supersurviveur/formalith" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsupersurviveur%2Fformalith", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsupersurviveur%2Fformalith'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4eb1e78a3cda2c8a167418e0bebb4373f9e47ef5
[INFO] checking supersurviveur/formalith against 1.95.0 for pr-155915
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsupersurviveur%2Fformalith" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-1-tc1/source/.cargo/config.toml
[INFO] started tweaking git repo https://github.com/supersurviveur/formalith
[INFO] finished tweaking git repo https://github.com/supersurviveur/formalith
[INFO] tweaked toml for git repo https://github.com/supersurviveur/formalith written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/supersurviveur/formalith on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 42 packages to latest Rust 1.95.0 compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded supports-color v3.0.2
[INFO] [stderr]   Downloaded owo-colors v4.3.0
[INFO] [stderr]   Downloaded malachite v0.9.1
[INFO] [stderr]   Downloaded dyn-hash v1.0.0
[INFO] [stderr]   Downloaded append-only-vec v0.1.8
[INFO] [stderr]   Downloaded dyn-eq v0.1.3
[INFO] [stderr]   Downloaded safe_arch v1.0.0
[INFO] [stderr]   Downloaded wide v1.4.0
[INFO] [stderr]   Downloaded malachite-q v0.9.1
[INFO] [stderr]   Downloaded malachite-base v0.9.1
[INFO] [stderr]   Downloaded malachite-nz v0.9.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 050ccf290d0c19179c1b1555c1b449ec30ae6239142fcbb7d08a7f35c3ac4c45
[INFO] running `Command { std: "docker" "start" "-a" "050ccf290d0c19179c1b1555c1b449ec30ae6239142fcbb7d08a7f35c3ac4c45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "050ccf290d0c19179c1b1555c1b449ec30ae6239142fcbb7d08a7f35c3ac4c45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "050ccf290d0c19179c1b1555c1b449ec30ae6239142fcbb7d08a7f35c3ac4c45", kill_on_drop: false }`
[INFO] [stdout] 050ccf290d0c19179c1b1555c1b449ec30ae6239142fcbb7d08a7f35c3ac4c45
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f2f7b30f8d796ea765d41f120b9b0c391336983551e51b89a0e8f3fe0ce9f32
[INFO] running `Command { std: "docker" "start" "-a" "0f2f7b30f8d796ea765d41f120b9b0c391336983551e51b89a0e8f3fe0ce9f32", kill_on_drop: false }`
[INFO] [stderr]    Compiling libm v0.2.16
[INFO] [stderr]    Compiling malachite-nz v0.9.1
[INFO] [stderr]    Compiling owo-colors v4.3.0
[INFO] [stderr]     Checking is_ci v1.2.0
[INFO] [stderr]     Checking safe_arch v1.0.0
[INFO] [stderr]     Checking hashbrown v0.16.1
[INFO] [stderr]     Checking itertools v0.14.0
[INFO] [stderr]     Checking tracing-core v0.1.36
[INFO] [stderr]     Checking append-only-vec v0.1.8
[INFO] [stderr]     Checking dyn-hash v1.0.0
[INFO] [stderr]     Checking dyn-clone v1.0.20
[INFO] [stderr]     Checking dyn-eq v0.1.3
[INFO] [stderr]     Checking typenum v1.20.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]     Checking supports-color v3.0.2
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking wide v1.4.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.23
[INFO] [stderr]     Checking malachite-base v0.9.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.31
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]     Checking malachite-q v0.9.1
[INFO] [stderr]     Checking malachite v0.9.1
[INFO] [stderr]     Checking formalith v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(specialization, iter_order_by)]
[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:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![feature(specialization, iter_order_by)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `formalith` (lib test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `formalith` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "0f2f7b30f8d796ea765d41f120b9b0c391336983551e51b89a0e8f3fe0ce9f32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f2f7b30f8d796ea765d41f120b9b0c391336983551e51b89a0e8f3fe0ce9f32", kill_on_drop: false }`
[INFO] [stdout] 0f2f7b30f8d796ea765d41f120b9b0c391336983551e51b89a0e8f3fe0ce9f32
