[INFO] cloning repository https://github.com/txus/lambada-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/txus/lambada-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftxus%2Flambada-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftxus%2Flambada-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32dac4a7b59175967d75a9782c66b48f11a13898
[INFO] testing txus/lambada-rs against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftxus%2Flambada-rs" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/txus/lambada-rs on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/txus/lambada-rs
[INFO] finished tweaking git repo https://github.com/txus/lambada-rs
[INFO] tweaked toml for git repo https://github.com/txus/lambada-rs written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/txus/lambada-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 71a682e3469fa25f38f4e5f8210a5d8540bf2cf59ccb2a5af25f1287dfbefa70
[INFO] running `Command { std: "docker" "start" "-a" "71a682e3469fa25f38f4e5f8210a5d8540bf2cf59ccb2a5af25f1287dfbefa70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "71a682e3469fa25f38f4e5f8210a5d8540bf2cf59ccb2a5af25f1287dfbefa70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71a682e3469fa25f38f4e5f8210a5d8540bf2cf59ccb2a5af25f1287dfbefa70", kill_on_drop: false }`
[INFO] [stdout] 71a682e3469fa25f38f4e5f8210a5d8540bf2cf59ccb2a5af25f1287dfbefa70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7efb0eed9af268b4f0545ddf64b66734ca6cd0bb61c0cefe0c36bd9347e5d81a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7efb0eed9af268b4f0545ddf64b66734ca6cd0bb61c0cefe0c36bd9347e5d81a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.1.10
[INFO] [stderr]    Compiling bitflags v0.1.1
[INFO] [stderr]    Compiling unicode-normalization v0.1.1
[INFO] [stderr]    Compiling unicode-width v0.1.3
[INFO] [stderr]    Compiling cons-list v0.0.2
[INFO] [stderr]    Compiling nom v0.4.0
[INFO] [stderr]    Compiling hamt v0.1.4
[INFO] [stdout] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cons-list-0.0.2/src/lib.rs:175:24
[INFO] [stdout]     |
[INFO] [stdout] 175 |             std::iter::order::eq(self.iter(), other.iter())
[INFO] [stdout]     |                        ^^^^^ could not find `order` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cons-list-0.0.2/src/lib.rs:180:24
[INFO] [stdout]     |
[INFO] [stdout] 180 |             std::iter::order::ne(self.iter(), other.iter())
[INFO] [stdout]     |                        ^^^^^ could not find `order` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cons-list-0.0.2/src/lib.rs:186:20
[INFO] [stdout]     |
[INFO] [stdout] 186 |         std::iter::order::partial_cmp(self.iter(), other.iter())
[INFO] [stdout]     |                    ^^^^^ could not find `order` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cons-list-0.0.2/src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(iter_order, rc_unique)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0554.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cons-list` due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7efb0eed9af268b4f0545ddf64b66734ca6cd0bb61c0cefe0c36bd9347e5d81a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7efb0eed9af268b4f0545ddf64b66734ca6cd0bb61c0cefe0c36bd9347e5d81a", kill_on_drop: false }`
[INFO] [stdout] 7efb0eed9af268b4f0545ddf64b66734ca6cd0bb61c0cefe0c36bd9347e5d81a