[INFO] cloning repository https://github.com/tkhsnt0/rust_dummy_resource
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tkhsnt0/rust_dummy_resource" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkhsnt0%2Frust_dummy_resource", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkhsnt0%2Frust_dummy_resource'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 70b28e21c9fb7dd44e5d4dbead8778ab5c695df4
[INFO] checking tkhsnt0/rust_dummy_resource against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftkhsnt0%2Frust_dummy_resource" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/tkhsnt0/rust_dummy_resource
[INFO] finished tweaking git repo https://github.com/tkhsnt0/rust_dummy_resource
[INFO] tweaked toml for git repo https://github.com/tkhsnt0/rust_dummy_resource written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tkhsnt0/rust_dummy_resource on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tkhsnt0/rust_dummy_resource 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8eacd52be81947d740c0b388068f5e973610c27de1b290cdf27e885ecbcde3ba
[INFO] running `Command { std: "docker" "start" "-a" "8eacd52be81947d740c0b388068f5e973610c27de1b290cdf27e885ecbcde3ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8eacd52be81947d740c0b388068f5e973610c27de1b290cdf27e885ecbcde3ba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eacd52be81947d740c0b388068f5e973610c27de1b290cdf27e885ecbcde3ba", kill_on_drop: false }`
[INFO] [stdout] 8eacd52be81947d740c0b388068f5e973610c27de1b290cdf27e885ecbcde3ba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 888077b07c30dfc41ec9f0f910b68c3c4dae10179720939a40891b1ad3a94b1a
[INFO] running `Command { std: "docker" "start" "-a" "888077b07c30dfc41ec9f0f910b68c3c4dae10179720939a40891b1ad3a94b1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.155
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rust_dummy_resource v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `len` is never used
[INFO] [stdout]   --> src/dummy.rs:46:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |     impl File {
[INFO] [stdout]    |     --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 46 |         pub fn len(&self) -> usize {
[INFO] [stdout]    |                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `len` is never used
[INFO] [stdout]   --> src/dummy.rs:46:16
[INFO] [stdout]    |
[INFO] [stdout] 30 |     impl File {
[INFO] [stdout]    |     --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 46 |         pub fn len(&self) -> usize {
[INFO] [stdout]    |                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.34s
[INFO] running `Command { std: "docker" "inspect" "888077b07c30dfc41ec9f0f910b68c3c4dae10179720939a40891b1ad3a94b1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "888077b07c30dfc41ec9f0f910b68c3c4dae10179720939a40891b1ad3a94b1a", kill_on_drop: false }`
[INFO] [stdout] 888077b07c30dfc41ec9f0f910b68c3c4dae10179720939a40891b1ad3a94b1a