[INFO] cloning repository https://github.com/cpearce/arm-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cpearce/arm-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcpearce%2Farm-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcpearce%2Farm-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 63a6d16e61f25f6ed20b7936ad9b19cc1d9b2dc7
[INFO] checking cpearce/arm-rs against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcpearce%2Farm-rs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cpearce/arm-rs 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] started tweaking git repo https://github.com/cpearce/arm-rs
[INFO] finished tweaking git repo https://github.com/cpearce/arm-rs
[INFO] tweaked toml for git repo https://github.com/cpearce/arm-rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/cpearce/arm-rs 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rayon-core v1.2.1
[INFO] [stderr]   Downloaded num_cpus v1.6.2
[INFO] [stderr]   Downloaded magenta-sys v0.1.1
[INFO] [stderr]   Downloaded scopeguard v0.3.2
[INFO] [stderr]   Downloaded lazy_static v0.2.8
[INFO] [stderr]   Downloaded argparse v0.2.1
[INFO] [stderr]   Downloaded either v1.1.0
[INFO] [stderr]   Downloaded coco v0.1.1
[INFO] [stderr]   Downloaded magenta v0.1.1
[INFO] [stderr]   Downloaded itertools v0.6.1
[INFO] [stderr]   Downloaded futures v0.1.14
[INFO] [stderr]   Downloaded libc v0.2.29
[INFO] [stderr]   Downloaded rand v0.3.16
[INFO] [stderr]   Downloaded rayon v0.8.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 68bb932cd9b7554fc93986e5648b094efbc0560934ae8f79655f4080293b6c95
[INFO] running `Command { std: "docker" "start" "-a" "68bb932cd9b7554fc93986e5648b094efbc0560934ae8f79655f4080293b6c95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68bb932cd9b7554fc93986e5648b094efbc0560934ae8f79655f4080293b6c95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68bb932cd9b7554fc93986e5648b094efbc0560934ae8f79655f4080293b6c95", kill_on_drop: false }`
[INFO] [stdout] 68bb932cd9b7554fc93986e5648b094efbc0560934ae8f79655f4080293b6c95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 64837a67026e59b49207c767d9ecdfdf7fbc7e9530ec3125fb0e8117792da42c
[INFO] running `Command { std: "docker" "start" "-a" "64837a67026e59b49207c767d9ecdfdf7fbc7e9530ec3125fb0e8117792da42c", kill_on_drop: false }`
[INFO] [stderr]     Checking either v1.1.0
[INFO] [stderr]     Checking libc v0.2.29
[INFO] [stderr]    Compiling rayon-core v1.2.1
[INFO] [stderr]     Checking scopeguard v0.3.2
[INFO] [stderr]     Checking lazy_static v0.2.8
[INFO] [stderr]     Checking futures v0.1.14
[INFO] [stderr]     Checking argparse v0.2.1
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking coco v0.1.1
[INFO] [stderr]     Checking itertools v0.6.1
[INFO] [stderr]     Checking num_cpus v1.6.2
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking arm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.13s
[INFO] running `Command { std: "docker" "inspect" "64837a67026e59b49207c767d9ecdfdf7fbc7e9530ec3125fb0e8117792da42c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64837a67026e59b49207c767d9ecdfdf7fbc7e9530ec3125fb0e8117792da42c", kill_on_drop: false }`
[INFO] [stdout] 64837a67026e59b49207c767d9ecdfdf7fbc7e9530ec3125fb0e8117792da42c