[INFO] fetching crate rusty-ci 0.9.6...
[INFO] checking rusty-ci-0.9.6 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate rusty-ci 0.9.6 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate rusty-ci 0.9.6 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 crates.io crate rusty-ci 0.9.6
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate rusty-ci 0.9.6
[INFO] tweaked toml for crates.io crate rusty-ci 0.9.6 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate rusty-ci 0.9.6 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wincolor v1.0.1
[INFO] [stderr]   Downloaded getrandom v0.1.8
[INFO] [stderr]   Downloaded serde_derive v1.0.98
[INFO] [stderr]   Downloaded rand_core v0.5.0
[INFO] [stderr]   Downloaded version-compare v0.0.9
[INFO] [stderr]   Downloaded serde v1.0.98
[INFO] [stderr]   Downloaded os_info v1.1.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.11
[INFO] [stderr]   Downloaded regex v1.2.1
[INFO] [stderr]   Downloaded libc v0.2.60
[INFO] [stderr]   Downloaded rusty-yaml v0.4.3
[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] 5d0c7b7c0853ca2b2adfd0ea8c12696de083e25430585a5c8d89315222e01481
[INFO] running `Command { std: "docker" "start" "-a" "5d0c7b7c0853ca2b2adfd0ea8c12696de083e25430585a5c8d89315222e01481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d0c7b7c0853ca2b2adfd0ea8c12696de083e25430585a5c8d89315222e01481", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d0c7b7c0853ca2b2adfd0ea8c12696de083e25430585a5c8d89315222e01481", kill_on_drop: false }`
[INFO] [stdout] 5d0c7b7c0853ca2b2adfd0ea8c12696de083e25430585a5c8d89315222e01481
[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] d73a118f993d71cc43d6fc44d3217846d2e41bd3576024fa76a7117b641b53c6
[INFO] running `Command { std: "docker" "start" "-a" "d73a118f993d71cc43d6fc44d3217846d2e41bd3576024fa76a7117b641b53c6", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.60
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling serde v1.0.98
[INFO] [stderr]    Compiling lazy_static v1.3.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling regex-syntax v0.6.11
[INFO] [stderr]    Compiling os_info v1.1.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling bitflags v1.1.0
[INFO] [stderr]     Checking linked-hash-map v0.5.2
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking termcolor v1.0.5
[INFO] [stderr]     Checking yaml-rust v0.4.3
[INFO] [stderr]     Checking version-compare v0.0.9
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]     Checking rusty-yaml v0.4.3
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]     Checking getrandom v0.1.8
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking rand_core v0.5.0
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.0
[INFO] [stderr]    Compiling regex v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.98
[INFO] [stderr]    Compiling rusty-ci v0.9.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.72s
[INFO] running `Command { std: "docker" "inspect" "d73a118f993d71cc43d6fc44d3217846d2e41bd3576024fa76a7117b641b53c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d73a118f993d71cc43d6fc44d3217846d2e41bd3576024fa76a7117b641b53c6", kill_on_drop: false }`
[INFO] [stdout] d73a118f993d71cc43d6fc44d3217846d2e41bd3576024fa76a7117b641b53c6