[INFO] cloning repository https://github.com/matheusgmc/binary-tree-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/matheusgmc/binary-tree-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatheusgmc%2Fbinary-tree-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatheusgmc%2Fbinary-tree-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0cb28d7e59e4594095521ca7ac3caa94a48b9dac
[INFO] checking matheusgmc/binary-tree-rust against master#80399064afa4a2cd153f30d02c25f7ea0383ed65 for opaque-soundness-fix
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatheusgmc%2Fbinary-tree-rust" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matheusgmc/binary-tree-rust on toolchain 80399064afa4a2cd153f30d02c25f7ea0383ed65
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/matheusgmc/binary-tree-rust
[INFO] finished tweaking git repo https://github.com/matheusgmc/binary-tree-rust
[INFO] tweaked toml for git repo https://github.com/matheusgmc/binary-tree-rust written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/matheusgmc/binary-tree-rust 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" "+80399064afa4a2cd153f30d02c25f7ea0383ed65" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking matheusgmc/binary-tree-rust against master#09bc67b9158392361780e779d32997f14cc75c39 for opaque-soundness-fix
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmatheusgmc%2Fbinary-tree-rust" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/matheusgmc/binary-tree-rust on toolchain 09bc67b9158392361780e779d32997f14cc75c39
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+09bc67b9158392361780e779d32997f14cc75c39" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/matheusgmc/binary-tree-rust
[INFO] finished tweaking git repo https://github.com/matheusgmc/binary-tree-rust
[INFO] tweaked toml for git repo https://github.com/matheusgmc/binary-tree-rust written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/matheusgmc/binary-tree-rust 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" "+09bc67b9158392361780e779d32997f14cc75c39" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+09bc67b9158392361780e779d32997f14cc75c39" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f22de9bd9c195def17dca08308327b49bf6ed7b5e736e9e1edf6cf68ac03d4f0
[INFO] running `Command { std: "docker" "start" "-a" "f22de9bd9c195def17dca08308327b49bf6ed7b5e736e9e1edf6cf68ac03d4f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f22de9bd9c195def17dca08308327b49bf6ed7b5e736e9e1edf6cf68ac03d4f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f22de9bd9c195def17dca08308327b49bf6ed7b5e736e9e1edf6cf68ac03d4f0", kill_on_drop: false }`
[INFO] [stdout] f22de9bd9c195def17dca08308327b49bf6ed7b5e736e9e1edf6cf68ac03d4f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+09bc67b9158392361780e779d32997f14cc75c39" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 367c23f3012704f8dcd7f8d551318afdbc55bfa5e733ec72690d93e71197fd3f
[INFO] running `Command { std: "docker" "start" "-a" "367c23f3012704f8dcd7f8d551318afdbc55bfa5e733ec72690d93e71197fd3f", kill_on_drop: false }`
[INFO] [stderr]     Checking binary_tree_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `inorder_traversal` is never used
[INFO] [stdout]   --> src/main.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl BinaryTree {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 80 |     fn inorder_traversal(&self, root: &Option<Box<Node>>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `inorder_traversal` is never used
[INFO] [stdout]   --> src/main.rs:80:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | impl BinaryTree {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 80 |     fn inorder_traversal(&self, root: &Option<Box<Node>>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] running `Command { std: "docker" "inspect" "367c23f3012704f8dcd7f8d551318afdbc55bfa5e733ec72690d93e71197fd3f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "367c23f3012704f8dcd7f8d551318afdbc55bfa5e733ec72690d93e71197fd3f", kill_on_drop: false }`
[INFO] [stdout] 367c23f3012704f8dcd7f8d551318afdbc55bfa5e733ec72690d93e71197fd3f
