[INFO] cloning repository https://github.com/samwho/whatis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/samwho/whatis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamwho%2Fwhatis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamwho%2Fwhatis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ccff8c62e0bb3fcdc283955ead66647c7d770b2a
[INFO] checking samwho/whatis against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsamwho%2Fwhatis" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/samwho/whatis 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/samwho/whatis
[INFO] finished tweaking git repo https://github.com/samwho/whatis
[INFO] tweaked toml for git repo https://github.com/samwho/whatis written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/samwho/whatis 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mutate_once v0.1.1
[INFO] [stderr]   Downloaded cfb v0.4.0
[INFO] [stderr]   Downloaded img-parts v0.2.3
[INFO] [stderr]   Downloaded structopt-derive v0.4.15
[INFO] [stderr]   Downloaded test-case v1.2.0
[INFO] [stderr]   Downloaded os_type v2.3.0
[INFO] [stderr]   Downloaded human-panic v1.0.3
[INFO] [stderr]   Downloaded anyhow v1.0.42
[INFO] [stderr]   Downloaded kamadak-exif v0.5.4
[INFO] [stderr]   Downloaded structopt v0.3.22
[INFO] [stderr]   Downloaded infer v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 1069796490b84f94b4c1baa09c789ad9b9272cec1ef7b2993248e56c7505f6b6
[INFO] running `Command { std: "docker" "start" "-a" "1069796490b84f94b4c1baa09c789ad9b9272cec1ef7b2993248e56c7505f6b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1069796490b84f94b4c1baa09c789ad9b9272cec1ef7b2993248e56c7505f6b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1069796490b84f94b4c1baa09c789ad9b9272cec1ef7b2993248e56c7505f6b6", kill_on_drop: false }`
[INFO] [stdout] 1069796490b84f94b4c1baa09c789ad9b9272cec1ef7b2993248e56c7505f6b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] fab3d106d1308822f47d72a0a72d0a60f8260607bfdb197d5098a738dbf42a4d
[INFO] running `Command { std: "docker" "start" "-a" "fab3d106d1308822f47d72a0a72d0a60f8260607bfdb197d5098a738dbf42a4d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking gimli v0.24.0
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking rustc-demangle v0.1.20
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling test-case v1.2.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.5
[INFO] [stderr]     Checking gif v0.11.2
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]     Checking bytemuck v1.7.0
[INFO] [stderr]     Checking mutate_once v0.1.1
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking kamadak-exif v0.5.4
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking rayon-core v1.9.1
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking img-parts v0.2.3
[INFO] [stderr]     Checking cfb v0.4.0
[INFO] [stderr]     Checking rayon v1.5.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking infer v0.5.0
[INFO] [stderr]     Checking addr2line v0.15.2
[INFO] [stderr]     Checking os_type v2.3.0
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]    Compiling structopt-derive v0.4.15
[INFO] [stderr]     Checking structopt v0.3.22
[INFO] [stderr]     Checking human-panic v1.0.3
[INFO] [stderr]     Checking whatis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.56s
[INFO] running `Command { std: "docker" "inspect" "fab3d106d1308822f47d72a0a72d0a60f8260607bfdb197d5098a738dbf42a4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fab3d106d1308822f47d72a0a72d0a60f8260607bfdb197d5098a738dbf42a4d", kill_on_drop: false }`
[INFO] [stdout] fab3d106d1308822f47d72a0a72d0a60f8260607bfdb197d5098a738dbf42a4d