[INFO] cloning repository https://github.com/m40r1/ext4_reader
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/m40r1/ext4_reader" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm40r1%2Fext4_reader", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm40r1%2Fext4_reader'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b23e56d7faee29912b9fc343d3c1380b570621d3
[INFO] checking m40r1/ext4_reader against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fm40r1%2Fext4_reader" "/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/m40r1/ext4_reader 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/m40r1/ext4_reader
[INFO] finished tweaking git repo https://github.com/m40r1/ext4_reader
[INFO] tweaked toml for git repo https://github.com/m40r1/ext4_reader written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/m40r1/ext4_reader 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 positioned-io v0.2.2
[INFO] [stderr]   Downloaded custom_debug_derive v0.5.0
[INFO] [stderr]   Downloaded hex-slice v0.1.4
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 09d0c9000da8aed1fe98e6bc7da03564ca72bb41b13f638cd9707ea6327a3ed8
[INFO] running `Command { std: "docker" "start" "-a" "09d0c9000da8aed1fe98e6bc7da03564ca72bb41b13f638cd9707ea6327a3ed8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "09d0c9000da8aed1fe98e6bc7da03564ca72bb41b13f638cd9707ea6327a3ed8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09d0c9000da8aed1fe98e6bc7da03564ca72bb41b13f638cd9707ea6327a3ed8", kill_on_drop: false }`
[INFO] [stdout] 09d0c9000da8aed1fe98e6bc7da03564ca72bb41b13f638cd9707ea6327a3ed8
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 72c295d85c585f25b41a4bcc4d807b1ce90d03c20bfbc20f2abab35ffad7068e
[INFO] running `Command { std: "docker" "start" "-a" "72c295d85c585f25b41a4bcc4d807b1ce90d03c20bfbc20f2abab35ffad7068e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking gimli v0.26.1
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking object v0.28.4
[INFO] [stderr]     Checking byteorder v0.5.3
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking positioned-io v0.2.2
[INFO] [stderr]    Compiling backtrace v0.3.65
[INFO] [stderr]     Checking hex-slice v0.1.4
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling synstructure v0.12.6
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling custom_debug_derive v0.5.0
[INFO] [stderr]    Compiling toml v0.5.9
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling thiserror v1.0.31
[INFO] [stderr]    Compiling proc-macro-crate v1.1.3
[INFO] [stderr]    Compiling num_enum_derive v0.5.7
[INFO] [stderr]     Checking num_enum v0.5.7
[INFO] [stderr]     Checking read v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 19.50s
[INFO] running `Command { std: "docker" "inspect" "72c295d85c585f25b41a4bcc4d807b1ce90d03c20bfbc20f2abab35ffad7068e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72c295d85c585f25b41a4bcc4d807b1ce90d03c20bfbc20f2abab35ffad7068e", kill_on_drop: false }`
[INFO] [stdout] 72c295d85c585f25b41a4bcc4d807b1ce90d03c20bfbc20f2abab35ffad7068e