[INFO] fetching crate rustgrep 0.1.0...
[INFO] checking rustgrep-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate rustgrep 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate rustgrep 0.1.0 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 crates.io crate rustgrep 0.1.0
[INFO] finished tweaking crates.io crate rustgrep 0.1.0
[INFO] tweaked toml for crates.io crate rustgrep 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate rustgrep 0.1.0 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 predicates-core v1.0.2
[INFO] [stderr]   Downloaded termtree v0.2.3
[INFO] [stderr]   Downloaded structopt v0.3.25
[INFO] [stderr]   Downloaded predicates-tree v1.0.4
[INFO] [stderr]   Downloaded predicates v1.0.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 315096e256c3c4d06a29a65803984f144c14c113557e419e83c09c1deab3f1ab
[INFO] running `Command { std: "docker" "start" "-a" "315096e256c3c4d06a29a65803984f144c14c113557e419e83c09c1deab3f1ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "315096e256c3c4d06a29a65803984f144c14c113557e419e83c09c1deab3f1ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "315096e256c3c4d06a29a65803984f144c14c113557e419e83c09c1deab3f1ab", kill_on_drop: false }`
[INFO] [stdout] 315096e256c3c4d06a29a65803984f144c14c113557e419e83c09c1deab3f1ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 7aa9ddf65fd35851a5d420fba1b79986e6bbb156e3091f7d6643f7e457a8b9e7
[INFO] running `Command { std: "docker" "start" "-a" "7aa9ddf65fd35851a5d420fba1b79986e6bbb156e3091f7d6643f7e457a8b9e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]    Compiling escargot v0.3.1
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking termtree v0.2.3
[INFO] [stderr]     Checking predicates-tree v1.0.4
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking rustgrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.10.2
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.22s
[INFO] running `Command { std: "docker" "inspect" "7aa9ddf65fd35851a5d420fba1b79986e6bbb156e3091f7d6643f7e457a8b9e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7aa9ddf65fd35851a5d420fba1b79986e6bbb156e3091f7d6643f7e457a8b9e7", kill_on_drop: false }`
[INFO] [stdout] 7aa9ddf65fd35851a5d420fba1b79986e6bbb156e3091f7d6643f7e457a8b9e7
[INFO] checking rustgrep-0.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate rustgrep 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate rustgrep 0.1.0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rustgrep 0.1.0
[INFO] finished tweaking crates.io crate rustgrep 0.1.0
[INFO] tweaked toml for crates.io crate rustgrep 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate rustgrep 0.1.0 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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 979f9706f275e1a5c8fb97bf4966b97c6032cee705538e37ea7a63065f615bf3
[INFO] running `Command { std: "docker" "start" "-a" "979f9706f275e1a5c8fb97bf4966b97c6032cee705538e37ea7a63065f615bf3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "979f9706f275e1a5c8fb97bf4966b97c6032cee705538e37ea7a63065f615bf3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "979f9706f275e1a5c8fb97bf4966b97c6032cee705538e37ea7a63065f615bf3", kill_on_drop: false }`
[INFO] [stdout] 979f9706f275e1a5c8fb97bf4966b97c6032cee705538e37ea7a63065f615bf3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f56c99e3cd19b56d7b78f853424ed891616e3a3b1fd02d3949bf37a9bfadc49
[INFO] running `Command { std: "docker" "start" "-a" "8f56c99e3cd19b56d7b78f853424ed891616e3a3b1fd02d3949bf37a9bfadc49", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking unicode-width v0.1.9
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling serde_json v1.0.68
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking predicates-core v1.0.2
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]    Compiling escargot v0.3.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking termtree v0.2.3
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking predicates-tree v1.0.4
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking predicates v1.0.8
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking rustgrep v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking assert_cmd v0.10.2
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.37s
[INFO] running `Command { std: "docker" "inspect" "8f56c99e3cd19b56d7b78f853424ed891616e3a3b1fd02d3949bf37a9bfadc49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f56c99e3cd19b56d7b78f853424ed891616e3a3b1fd02d3949bf37a9bfadc49", kill_on_drop: false }`
[INFO] [stdout] 8f56c99e3cd19b56d7b78f853424ed891616e3a3b1fd02d3949bf37a9bfadc49