[INFO] cloning repository https://github.com/hissa/png-handwriting-challenge
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hissa/png-handwriting-challenge" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhissa%2Fpng-handwriting-challenge", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhissa%2Fpng-handwriting-challenge'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 864ebc6b79ffe816a9998a76aee898f60580383e
[INFO] checking hissa/png-handwriting-challenge against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhissa%2Fpng-handwriting-challenge" "/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/hissa/png-handwriting-challenge on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/hissa/png-handwriting-challenge
[INFO] finished tweaking git repo https://github.com/hissa/png-handwriting-challenge
[INFO] tweaked toml for git repo https://github.com/hissa/png-handwriting-challenge written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/hissa/png-handwriting-challenge 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5b71e99a6205ed32a0402b4cf59525f4bda4e6aef6af68a41bcc71b65a96bd7c
[INFO] running `Command { std: "docker" "start" "-a" "5b71e99a6205ed32a0402b4cf59525f4bda4e6aef6af68a41bcc71b65a96bd7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5b71e99a6205ed32a0402b4cf59525f4bda4e6aef6af68a41bcc71b65a96bd7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b71e99a6205ed32a0402b4cf59525f4bda4e6aef6af68a41bcc71b65a96bd7c", kill_on_drop: false }`
[INFO] [stdout] 5b71e99a6205ed32a0402b4cf59525f4bda4e6aef6af68a41bcc71b65a96bd7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f08e86890d4ba3b9e678fe63aed351df13b0acd99cf3a2ee3923e13ee57a33a
[INFO] running `Command { std: "docker" "start" "-a" "0f08e86890d4ba3b9e678fe63aed351df13b0acd99cf3a2ee3923e13ee57a33a", kill_on_drop: false }`
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking crc-catalog v2.4.0
[INFO] [stderr]     Checking crc v3.0.1
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking png-handwriting-challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "0f08e86890d4ba3b9e678fe63aed351df13b0acd99cf3a2ee3923e13ee57a33a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f08e86890d4ba3b9e678fe63aed351df13b0acd99cf3a2ee3923e13ee57a33a", kill_on_drop: false }`
[INFO] [stdout] 0f08e86890d4ba3b9e678fe63aed351df13b0acd99cf3a2ee3923e13ee57a33a