[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] 92bcbd0b2db294357063ab3cb82b988a5b7169b9
[INFO] checking arnfaldur/RobozzleSolver against master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farnfaldur%2FRobozzleSolver" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arnfaldur/RobozzleSolver on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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-8/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b05f514fe9b64c534e19d9e7c543e9b6c80b512b8402aca86ed8c26e23cc0426
[INFO] running `Command { std: "docker" "start" "-a" "b05f514fe9b64c534e19d9e7c543e9b6c80b512b8402aca86ed8c26e23cc0426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b05f514fe9b64c534e19d9e7c543e9b6c80b512b8402aca86ed8c26e23cc0426", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b05f514fe9b64c534e19d9e7c543e9b6c80b512b8402aca86ed8c26e23cc0426", kill_on_drop: false }`
[INFO] [stdout] b05f514fe9b64c534e19d9e7c543e9b6c80b512b8402aca86ed8c26e23cc0426
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 49fb3762b436b602f4df2a232d3e476ca183cef23c3a0cc926d2e490a502cd9c
[INFO] running `Command { std: "docker" "start" "-a" "49fb3762b436b602f4df2a232d3e476ca183cef23c3a0cc926d2e490a502cd9c", kill_on_drop: false }`
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[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: 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` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "49fb3762b436b602f4df2a232d3e476ca183cef23c3a0cc926d2e490a502cd9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49fb3762b436b602f4df2a232d3e476ca183cef23c3a0cc926d2e490a502cd9c", kill_on_drop: false }`
[INFO] [stdout] 49fb3762b436b602f4df2a232d3e476ca183cef23c3a0cc926d2e490a502cd9c