[INFO] cloning repository https://github.com/tigerfsh/rust_cow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tigerfsh/rust_cow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftigerfsh%2Frust_cow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftigerfsh%2Frust_cow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ef653cb48b5433f81e8fc6d867a323003c456d06
[INFO] checking tigerfsh/rust_cow against master#c1feb3eceef7d5f0126c309a87062cf413fe0a25 for pr-121053
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftigerfsh%2Frust_cow" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tigerfsh/rust_cow on toolchain c1feb3eceef7d5f0126c309a87062cf413fe0a25
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c1feb3eceef7d5f0126c309a87062cf413fe0a25" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tigerfsh/rust_cow
[INFO] finished tweaking git repo https://github.com/tigerfsh/rust_cow
[INFO] tweaked toml for git repo https://github.com/tigerfsh/rust_cow written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/tigerfsh/rust_cow 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" "+c1feb3eceef7d5f0126c309a87062cf413fe0a25" "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 tigerfsh/rust_cow against try#0d3c0c4551bd9d6b6a4bd51e251b596e0195adf5 for pr-121053
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftigerfsh%2Frust_cow" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tigerfsh/rust_cow on toolchain 0d3c0c4551bd9d6b6a4bd51e251b596e0195adf5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0d3c0c4551bd9d6b6a4bd51e251b596e0195adf5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tigerfsh/rust_cow
[INFO] finished tweaking git repo https://github.com/tigerfsh/rust_cow
[INFO] tweaked toml for git repo https://github.com/tigerfsh/rust_cow written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/tigerfsh/rust_cow 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" "+0d3c0c4551bd9d6b6a4bd51e251b596e0195adf5" "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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+0d3c0c4551bd9d6b6a4bd51e251b596e0195adf5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 67a93127d25322f9a9da258430a573a0f9f8a052cdc1dd5be7ab49bccabba70d
[INFO] running `Command { std: "docker" "start" "-a" "67a93127d25322f9a9da258430a573a0f9f8a052cdc1dd5be7ab49bccabba70d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "67a93127d25322f9a9da258430a573a0f9f8a052cdc1dd5be7ab49bccabba70d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67a93127d25322f9a9da258430a573a0f9f8a052cdc1dd5be7ab49bccabba70d", kill_on_drop: false }`
[INFO] [stdout] 67a93127d25322f9a9da258430a573a0f9f8a052cdc1dd5be7ab49bccabba70d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+0d3c0c4551bd9d6b6a4bd51e251b596e0195adf5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0b409b7cdec6e6ad1d462310729b419c9bb55ecd5a272fd8c5ca411d02062c69
[INFO] running `Command { std: "docker" "start" "-a" "0b409b7cdec6e6ad1d462310729b419c9bb55ecd5a272fd8c5ca411d02062c69", kill_on_drop: false }`
[INFO] [stderr]     Checking demo_1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `first_name` and `last_name` are never used
[INFO] [stdout]   --> src/main.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<'a> User<'a> {
[INFO] [stdout]    | ----------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn first_name(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn last_name(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `first_name` and `last_name` are never used
[INFO] [stdout]   --> src/main.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl<'a> User<'a> {
[INFO] [stdout]    | ----------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 33 |     pub fn first_name(&self) -> &str {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub fn last_name(&self) -> &str {
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "0b409b7cdec6e6ad1d462310729b419c9bb55ecd5a272fd8c5ca411d02062c69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b409b7cdec6e6ad1d462310729b419c9bb55ecd5a272fd8c5ca411d02062c69", kill_on_drop: false }`
[INFO] [stdout] 0b409b7cdec6e6ad1d462310729b419c9bb55ecd5a272fd8c5ca411d02062c69