[INFO] cloning repository https://github.com/arnfaldur/RobozzleSolver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arnfaldur/RobozzleSolver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnfaldur%2FRobozzleSolver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnfaldur%2FRobozzleSolver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1fef64afc10eab88ceac5b26395ef7b2e541f92e
[INFO] checking arnfaldur/RobozzleSolver against try#3bb2879ea9e58d65b875f9a98df44f4a43ce2597 for pr-85387
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnfaldur%2FRobozzleSolver" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arnfaldur/RobozzleSolver on toolchain 3bb2879ea9e58d65b875f9a98df44f4a43ce2597
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/arnfaldur/RobozzleSolver
[INFO] finished tweaking git repo https://github.com/arnfaldur/RobozzleSolver
[INFO] tweaked toml for git repo https://github.com/arnfaldur/RobozzleSolver written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/arnfaldur/RobozzleSolver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-fs v0.2.0-alpha.6
[INFO] [stderr]   Downloaded rand_pcg v0.2.0
[INFO] [stderr]   Downloaded headers v0.2.3
[INFO] [stderr]   Downloaded tokio-macros v0.2.0-alpha.6
[INFO] [stderr]   Downloaded tokio-timer v0.3.0-alpha.6
[INFO] [stderr]   Downloaded tokio-tls v0.3.0-alpha.6
[INFO] [stderr]   Downloaded warp v0.1.20
[INFO] [stderr]   Downloaded fantoccini v0.12.0-alpha.4
[INFO] [stderr]   Downloaded tokio v0.2.0-alpha.6
[INFO] [stderr]   Downloaded headers-core v0.1.1
[INFO] [stderr]   Downloaded hyper-tls v0.4.0-alpha.4
[INFO] [stderr]   Downloaded webdriver v0.40.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e2265747e489a48f01a464f3c38b2fb5b5c50f638d6af3ed54884b26c7e04ee7
[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" "e2265747e489a48f01a464f3c38b2fb5b5c50f638d6af3ed54884b26c7e04ee7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e2265747e489a48f01a464f3c38b2fb5b5c50f638d6af3ed54884b26c7e04ee7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2265747e489a48f01a464f3c38b2fb5b5c50f638d6af3ed54884b26c7e04ee7", kill_on_drop: false }`
[INFO] [stdout] e2265747e489a48f01a464f3c38b2fb5b5c50f638d6af3ed54884b26c7e04ee7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+3bb2879ea9e58d65b875f9a98df44f4a43ce2597" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 35d7c57172e019848e04333c512fafcbab7310a6edffc82ab0a1629cc9869d6d
[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" "35d7c57172e019848e04333c512fafcbab7310a6edffc82ab0a1629cc9869d6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
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[INFO] [stderr]    Compiling getrandom v0.1.12
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[INFO] [stderr]     Checking tokio-current-thread v0.1.6
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[INFO] [stderr]    Compiling pin-project-internal v0.4.5
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[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling tokio-macros v0.2.0-alpha.6
[INFO] [stderr]     Checking tracing v0.1.10
[INFO] [stderr]     Checking tokio-executor v0.2.0-alpha.6
[INFO] [stderr]     Checking pin-project v0.4.5
[INFO] [stderr]     Checking tokio-io v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-timer v0.3.0-alpha.6
[INFO] [stderr]     Checking tokio-codec v0.2.0-alpha.6
[INFO] [stderr]     Checking tokio-fs v0.2.0-alpha.6
[INFO] [stderr]     Checking tower-make v0.3.0-alpha.2a
[INFO] [stderr]     Checking tokio-tls v0.3.0-alpha.6
[INFO] [stderr]     Checking tokio-net v0.2.0-alpha.6
[INFO] [stderr]     Checking h2 v0.2.0-alpha.3
[INFO] [stderr]     Checking tokio v0.2.0-alpha.6
[INFO] [stderr]     Checking hyper v0.13.0-alpha.4
[INFO] [stderr]     Checking hyper-tls v0.4.0-alpha.4
[INFO] [stderr]     Checking serde_json v1.0.41
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking warp v0.1.20
[INFO] [stderr]     Checking webdriver v0.40.2
[INFO] [stderr]     Checking fantoccini v0.12.0-alpha.4
[INFO] [stderr]     Checking solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `remove_item` found for mutable reference `&mut Vec<Leaf>` in the current scope
[INFO] [stdout]    --> src/solver/carlo.rs:145:10
[INFO] [stdout]     |
[INFO] [stdout] 145 |     tree.remove_item(leaf);
[INFO] [stdout]     |          ^^^^^^^^^^^ method not found in `&mut Vec<Leaf>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `remove_item` found for mutable reference `&mut Vec<Leaf>` in the current scope
[INFO] [stdout]    --> src/solver/carlo.rs:145:10
[INFO] [stdout]     |
[INFO] [stdout] 145 |     tree.remove_item(leaf);
[INFO] [stdout]     |          ^^^^^^^^^^^ method not found in `&mut Vec<Leaf>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `solver`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "35d7c57172e019848e04333c512fafcbab7310a6edffc82ab0a1629cc9869d6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35d7c57172e019848e04333c512fafcbab7310a6edffc82ab0a1629cc9869d6d", kill_on_drop: false }`
[INFO] [stdout] 35d7c57172e019848e04333c512fafcbab7310a6edffc82ab0a1629cc9869d6d