[INFO] cloning repository https://github.com/EricDunaway/rust-launcher
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EricDunaway/rust-launcher" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEricDunaway%2Frust-launcher", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEricDunaway%2Frust-launcher'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7a4d8b34be6c083b618754c2747df806c12e4db3
[INFO] checking EricDunaway/rust-launcher against master#e4106065bf1bb515935d5d024e8d9c86454e2b22 for pr-112160
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEricDunaway%2Frust-launcher" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EricDunaway/rust-launcher on toolchain e4106065bf1bb515935d5d024e8d9c86454e2b22
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-6-tc1/source/.cargo/config
[INFO] started tweaking git repo https://github.com/EricDunaway/rust-launcher
[INFO] finished tweaking git repo https://github.com/EricDunaway/rust-launcher
[INFO] tweaked toml for git repo https://github.com/EricDunaway/rust-launcher written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/EricDunaway/rust-launcher 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" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn v1.0.23
[INFO] [stderr]   Downloaded proc-macro2 v1.0.15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 05c6819b4e8027a8cbb1f7c436f66f32321ce30570a7da5b29d36be81a96abc3
[INFO] running `Command { std: "docker" "start" "-a" "05c6819b4e8027a8cbb1f7c436f66f32321ce30570a7da5b29d36be81a96abc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "05c6819b4e8027a8cbb1f7c436f66f32321ce30570a7da5b29d36be81a96abc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05c6819b4e8027a8cbb1f7c436f66f32321ce30570a7da5b29d36be81a96abc3", kill_on_drop: false }`
[INFO] [stdout] 05c6819b4e8027a8cbb1f7c436f66f32321ce30570a7da5b29d36be81a96abc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+e4106065bf1bb515935d5d024e8d9c86454e2b22" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8556dbbe458a2cbba31d9a70ed13f0b94ddb2756a9afbad07bc114454961dfa5
[INFO] running `Command { std: "docker" "start" "-a" "8556dbbe458a2cbba31d9a70ed13f0b94ddb2756a9afbad07bc114454961dfa5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling proc-macro2 v1.0.15
[INFO] [stderr]    Compiling syn v1.0.23
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]     Checking arc-swap v0.4.6
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking bytes v0.5.4
[INFO] [stderr]     Checking pin-project-lite v0.1.5
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking signal-hook-registry v1.2.0
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]    Compiling serde_derive v1.0.110
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking launcher v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&std::string::String` instead of borrowing the inner type
[INFO] [stdout]   --> src/exec.rs:38:58
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Some(self.steps[self.current_step.unwrap()].label.borrow())
[INFO] [stdout]    |                                                          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.borrow()` on a double reference, which returns `&std::string::String` instead of borrowing the inner type
[INFO] [stdout]   --> src/exec.rs:38:58
[INFO] [stdout]    |
[INFO] [stdout] 38 |         Some(self.steps[self.current_step.unwrap()].label.borrow())
[INFO] [stdout]    |                                                          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` 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 [unoptimized + debuginfo] target(s) in 8.84s
[INFO] running `Command { std: "docker" "inspect" "8556dbbe458a2cbba31d9a70ed13f0b94ddb2756a9afbad07bc114454961dfa5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8556dbbe458a2cbba31d9a70ed13f0b94ddb2756a9afbad07bc114454961dfa5", kill_on_drop: false }`
[INFO] [stdout] 8556dbbe458a2cbba31d9a70ed13f0b94ddb2756a9afbad07bc114454961dfa5