[INFO] cloning repository https://github.com/egonik-unlp/rust_screen_background
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/egonik-unlp/rust_screen_background" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fegonik-unlp%2Frust_screen_background", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fegonik-unlp%2Frust_screen_background'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f4309c470176ef4810c67f3671507210d4bd974a
[INFO] checking egonik-unlp/rust_screen_background against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fegonik-unlp%2Frust_screen_background" "/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/egonik-unlp/rust_screen_background 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/egonik-unlp/rust_screen_background
[INFO] finished tweaking git repo https://github.com/egonik-unlp/rust_screen_background
[INFO] tweaked toml for git repo https://github.com/egonik-unlp/rust_screen_background written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/egonik-unlp/rust_screen_background 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 pest_meta v2.7.1
[INFO] [stderr]   Downloaded pest v2.7.1
[INFO] [stderr]   Downloaded pest_generator v2.7.1
[INFO] [stderr]   Downloaded pest_derive v2.7.1
[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] b5cf8eb669e0129841b880d1eef4ae1e0b42fd2eb4b6c4c2eb5066ad03f770c5
[INFO] running `Command { std: "docker" "start" "-a" "b5cf8eb669e0129841b880d1eef4ae1e0b42fd2eb4b6c4c2eb5066ad03f770c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b5cf8eb669e0129841b880d1eef4ae1e0b42fd2eb4b6c4c2eb5066ad03f770c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5cf8eb669e0129841b880d1eef4ae1e0b42fd2eb4b6c4c2eb5066ad03f770c5", kill_on_drop: false }`
[INFO] [stdout] b5cf8eb669e0129841b880d1eef4ae1e0b42fd2eb4b6c4c2eb5066ad03f770c5
[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] 726e4d3bf0342cc3013513f2822371a6b17a856dd05998cd58e1cf4cf19e77b4
[INFO] running `Command { std: "docker" "start" "-a" "726e4d3bf0342cc3013513f2822371a6b17a856dd05998cd58e1cf4cf19e77b4", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling ucd-trie v0.1.6
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling matrixmultiply v0.3.7
[INFO] [stderr]     Checking num-complex v0.4.3
[INFO] [stderr]    Compiling syn v2.0.26
[INFO] [stderr]     Checking miniz_oxide v0.7.1
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking flate2 v1.0.26
[INFO] [stderr]     Checking ndarray v0.15.6
[INFO] [stderr]     Checking getrandom v0.2.10
[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]    Compiling thiserror-impl v1.0.43
[INFO] [stderr]    Compiling thiserror v1.0.43
[INFO] [stderr]    Compiling pest v2.7.1
[INFO] [stderr]     Checking zip v0.5.13
[INFO] [stderr]    Compiling pest_meta v2.7.1
[INFO] [stderr]    Compiling pest_generator v2.7.1
[INFO] [stderr]    Compiling pest_derive v2.7.1
[INFO] [stderr]     Checking py_literal v0.4.0
[INFO] [stderr]     Checking ndarray-npy v0.8.1
[INFO] [stderr]     Checking screen_saver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 18.95s
[INFO] running `Command { std: "docker" "inspect" "726e4d3bf0342cc3013513f2822371a6b17a856dd05998cd58e1cf4cf19e77b4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "726e4d3bf0342cc3013513f2822371a6b17a856dd05998cd58e1cf4cf19e77b4", kill_on_drop: false }`
[INFO] [stdout] 726e4d3bf0342cc3013513f2822371a6b17a856dd05998cd58e1cf4cf19e77b4