[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#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[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 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded miow v0.3.4
[INFO] [stderr]   Downloaded socket2 v0.3.12
[INFO] [stderr]   Downloaded pin-project-lite v0.1.5
[INFO] [stderr]   Downloaded proc-macro2 v1.0.15
[INFO] [stderr]   Downloaded tokio v0.2.21
[INFO] [stderr]   Downloaded toml v0.5.6
[INFO] [stderr]   Downloaded net2 v0.2.34
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e1aeac434a18d4766e75789a984149b6ff0fec8f9c147ed4fe1eab66841b46d5
[INFO] running `Command { std: "docker" "start" "-a" "e1aeac434a18d4766e75789a984149b6ff0fec8f9c147ed4fe1eab66841b46d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e1aeac434a18d4766e75789a984149b6ff0fec8f9c147ed4fe1eab66841b46d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1aeac434a18d4766e75789a984149b6ff0fec8f9c147ed4fe1eab66841b46d5", kill_on_drop: false }`
[INFO] [stdout] e1aeac434a18d4766e75789a984149b6ff0fec8f9c147ed4fe1eab66841b46d5
[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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1163be8c4ca7913ee9750b7389adeb71d5696885decc61ba236fe2d10d4ad560
[INFO] running `Command { std: "docker" "start" "-a" "1163be8c4ca7913ee9750b7389adeb71d5696885decc61ba236fe2d10d4ad560", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling proc-macro2 v1.0.15
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling syn v1.0.23
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling serde v1.0.110
[INFO] [stderr]     Checking slab v0.4.2
[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: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exec.rs:49:54
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 .map(|x| -> ExecApp { ExecApp::from(x.borrow()) })
[INFO] [stdout]    |                                                      ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `App<'_>` does not implement `Borrow`, so calling `borrow` on `&App<'_>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 49 -                 .map(|x| -> ExecApp { ExecApp::from(x.borrow()) })
[INFO] [stdout] 49 +                 .map(|x| -> ExecApp { ExecApp::from(x) })
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `App<'_>`, implement `Clone` for it
[INFO] [stdout]   --> src/step.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  + #[derive(Clone)]
[INFO] [stdout] 7  | pub struct App<'a> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/exec.rs:49:54
[INFO] [stdout]    |
[INFO] [stdout] 49 |                 .map(|x| -> ExecApp { ExecApp::from(x.borrow()) })
[INFO] [stdout]    |                                                      ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `App<'_>` does not implement `Borrow`, so calling `borrow` on `&App<'_>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 49 -                 .map(|x| -> ExecApp { ExecApp::from(x.borrow()) })
[INFO] [stdout] 49 +                 .map(|x| -> ExecApp { ExecApp::from(x) })
[INFO] [stdout]    |
[INFO] [stdout] help: if you meant to clone `App<'_>`, implement `Clone` for it
[INFO] [stdout]   --> src/step.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  + #[derive(Clone)]
[INFO] [stdout] 7  | pub struct App<'a> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.57s
[INFO] running `Command { std: "docker" "inspect" "1163be8c4ca7913ee9750b7389adeb71d5696885decc61ba236fe2d10d4ad560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1163be8c4ca7913ee9750b7389adeb71d5696885decc61ba236fe2d10d4ad560", kill_on_drop: false }`
[INFO] [stdout] 1163be8c4ca7913ee9750b7389adeb71d5696885decc61ba236fe2d10d4ad560