[INFO] cloning repository https://github.com/AsuMagic/oxidizedbrain
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AsuMagic/oxidizedbrain" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAsuMagic%2Foxidizedbrain", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAsuMagic%2Foxidizedbrain'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 774c3fc15721acf64311ac3a541e49c1738db856
[INFO] checking AsuMagic/oxidizedbrain against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAsuMagic%2Foxidizedbrain" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AsuMagic/oxidizedbrain 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/AsuMagic/oxidizedbrain
[INFO] finished tweaking git repo https://github.com/AsuMagic/oxidizedbrain
[INFO] tweaked toml for git repo https://github.com/AsuMagic/oxidizedbrain written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/AsuMagic/oxidizedbrain 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 hermit-abi v0.1.13
[INFO] [stderr]   Downloaded structopt-derive v0.4.7
[INFO] [stderr]   Downloaded quote v1.0.6
[INFO] [stderr]   Downloaded cranelift-simplejit v0.63.0
[INFO] [stderr]   Downloaded proc-macro2 v1.0.13
[INFO] [stderr]   Downloaded errno-dragonfly v0.1.1
[INFO] [stderr]   Downloaded cranelift-native v0.63.0
[INFO] [stderr]   Downloaded structopt v0.3.14
[INFO] [stderr]   Downloaded cranelift-module v0.63.0
[INFO] [stderr]   Downloaded cranelift-codegen-shared v0.63.0
[INFO] [stderr]   Downloaded thiserror-impl v1.0.19
[INFO] [stderr]   Downloaded anyhow v1.0.31
[INFO] [stderr]   Downloaded cranelift-frontend v0.63.0
[INFO] [stderr]   Downloaded cranelift-bforest v0.63.0
[INFO] [stderr]   Downloaded smallvec v1.4.0
[INFO] [stderr]   Downloaded cc v1.0.54
[INFO] [stderr]   Downloaded cranelift-entity v0.63.0
[INFO] [stderr]   Downloaded thiserror v1.0.19
[INFO] [stderr]   Downloaded raw-cpuid v7.0.3
[INFO] [stderr]   Downloaded errno v0.2.5
[INFO] [stderr]   Downloaded region v2.1.2
[INFO] [stderr]   Downloaded regalloc v0.0.21
[INFO] [stderr]   Downloaded syn v1.0.23
[INFO] [stderr]   Downloaded cranelift-codegen-meta v0.63.0
[INFO] [stderr]   Downloaded cranelift-codegen v0.63.0
[INFO] [stderr]   Downloaded libc v0.2.70
[INFO] [stderr]   Downloaded cranelift v0.63.0
[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] 4ce6e2bbe3886023edcac37a0a31da251b765e3e523be8ab34991030ad9ce5a3
[INFO] running `Command { std: "docker" "start" "-a" "4ce6e2bbe3886023edcac37a0a31da251b765e3e523be8ab34991030ad9ce5a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4ce6e2bbe3886023edcac37a0a31da251b765e3e523be8ab34991030ad9ce5a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ce6e2bbe3886023edcac37a0a31da251b765e3e523be8ab34991030ad9ce5a3", kill_on_drop: false }`
[INFO] [stdout] 4ce6e2bbe3886023edcac37a0a31da251b765e3e523be8ab34991030ad9ce5a3
[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] d02d6191f7b6a1681139b6f1a0836b10bb7035c0d82a960ae1190cd22437107d
[INFO] running `Command { std: "docker" "start" "-a" "d02d6191f7b6a1681139b6f1a0836b10bb7035c0d82a960ae1190cd22437107d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling syn v1.0.23
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.63.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cranelift-entity v0.63.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.63.0
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking cranelift-bforest v0.63.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]     Checking regalloc v0.0.21
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking errno v0.2.5
[INFO] [stderr]     Checking region v2.1.2
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling raw-cpuid v7.0.3
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.19
[INFO] [stderr]    Compiling structopt-derive v0.4.7
[INFO] [stderr]     Checking thiserror v1.0.19
[INFO] [stderr]    Compiling cranelift-codegen v0.63.0
[INFO] [stderr]     Checking structopt v0.3.14
[INFO] [stderr]     Checking cranelift-frontend v0.63.0
[INFO] [stderr]     Checking cranelift-native v0.63.0
[INFO] [stderr]     Checking cranelift-module v0.63.0
[INFO] [stderr]     Checking cranelift-simplejit v0.63.0
[INFO] [stderr]     Checking cranelift v0.63.0
[INFO] [stderr]     Checking oxidizedbrain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/bf/vm.rs:17:21
[INFO] [stdout]    |
[INFO] [stdout] 17 |     TapeOutOfBounds{index: usize},
[INFO] [stdout]    |     --------------- ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/bf/vm.rs:17:21
[INFO] [stdout]    |
[INFO] [stdout] 17 |     TapeOutOfBounds{index: usize},
[INFO] [stdout]    |     --------------- ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 31.89s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: cranelift-codegen-meta v0.63.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] running `Command { std: "docker" "inspect" "d02d6191f7b6a1681139b6f1a0836b10bb7035c0d82a960ae1190cd22437107d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d02d6191f7b6a1681139b6f1a0836b10bb7035c0d82a960ae1190cd22437107d", kill_on_drop: false }`
[INFO] [stdout] d02d6191f7b6a1681139b6f1a0836b10bb7035c0d82a960ae1190cd22437107d
[INFO] checking AsuMagic/oxidizedbrain against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAsuMagic%2Foxidizedbrain" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AsuMagic/oxidizedbrain 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 git repo https://github.com/AsuMagic/oxidizedbrain
[INFO] finished tweaking git repo https://github.com/AsuMagic/oxidizedbrain
[INFO] tweaked toml for git repo https://github.com/AsuMagic/oxidizedbrain written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/AsuMagic/oxidizedbrain 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] 7f813442fa06ed41d4c701e9f26a36e91f49dd62f3ab07919c1155f7a637d31c
[INFO] running `Command { std: "docker" "start" "-a" "7f813442fa06ed41d4c701e9f26a36e91f49dd62f3ab07919c1155f7a637d31c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7f813442fa06ed41d4c701e9f26a36e91f49dd62f3ab07919c1155f7a637d31c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f813442fa06ed41d4c701e9f26a36e91f49dd62f3ab07919c1155f7a637d31c", kill_on_drop: false }`
[INFO] [stdout] 7f813442fa06ed41d4c701e9f26a36e91f49dd62f3ab07919c1155f7a637d31c
[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] 4eaa4c159bac99458eb23428b065b0d2365d482533cf3e5c13bb9d67aa3b0c4e
[INFO] running `Command { std: "docker" "start" "-a" "4eaa4c159bac99458eb23428b065b0d2365d482533cf3e5c13bb9d67aa3b0c4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling syn v1.0.23
[INFO] [stderr]    Compiling cranelift-entity v0.63.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.63.0
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.63.0
[INFO] [stderr]     Checking smallvec v1.4.0
[INFO] [stderr]     Checking cranelift-bforest v0.63.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]     Checking regalloc v0.0.21
[INFO] [stderr]    Compiling cc v1.0.54
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]    Compiling quote v1.0.6
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking region v2.1.2
[INFO] [stderr]     Checking errno v0.2.5
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling raw-cpuid v7.0.3
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.19
[INFO] [stderr]    Compiling structopt-derive v0.4.7
[INFO] [stderr]    Compiling cranelift-codegen v0.63.0
[INFO] [stderr]     Checking thiserror v1.0.19
[INFO] [stderr]     Checking structopt v0.3.14
[INFO] [stderr]     Checking cranelift-module v0.63.0
[INFO] [stderr]     Checking cranelift-native v0.63.0
[INFO] [stderr]     Checking cranelift-frontend v0.63.0
[INFO] [stderr]     Checking cranelift-simplejit v0.63.0
[INFO] [stderr]     Checking cranelift v0.63.0
[INFO] [stderr]     Checking oxidizedbrain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/bf/vm.rs:17:21
[INFO] [stdout]    |
[INFO] [stdout] 17 |     TapeOutOfBounds{index: usize},
[INFO] [stdout]    |     --------------- ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index` is never read
[INFO] [stdout]   --> src/bf/vm.rs:17:21
[INFO] [stdout]    |
[INFO] [stdout] 17 |     TapeOutOfBounds{index: usize},
[INFO] [stdout]    |     --------------- ^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 32.17s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: cranelift-codegen-meta v0.63.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 4`
[INFO] running `Command { std: "docker" "inspect" "4eaa4c159bac99458eb23428b065b0d2365d482533cf3e5c13bb9d67aa3b0c4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4eaa4c159bac99458eb23428b065b0d2365d482533cf3e5c13bb9d67aa3b0c4e", kill_on_drop: false }`
[INFO] [stdout] 4eaa4c159bac99458eb23428b065b0d2365d482533cf3e5c13bb9d67aa3b0c4e