[INFO] cloning repository https://github.com/PurpleMyst/synacor-vm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PurpleMyst/synacor-vm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Fsynacor-vm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Fsynacor-vm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fc19c506488d0c2f13c531bd0096a8593d790108
[INFO] checking PurpleMyst/synacor-vm against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPurpleMyst%2Fsynacor-vm" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PurpleMyst/synacor-vm 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/PurpleMyst/synacor-vm
[INFO] finished tweaking git repo https://github.com/PurpleMyst/synacor-vm
[INFO] tweaked toml for git repo https://github.com/PurpleMyst/synacor-vm written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/PurpleMyst/synacor-vm 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 unicode-segmentation v1.7.1
[INFO] [stderr]   Downloaded signal-hook-registry v1.3.0
[INFO] [stderr]   Downloaded miow v0.3.6
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[INFO] [stderr]   Downloaded crossterm_winapi v0.6.2
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[INFO] [stderr]   Downloaded crossbeam-deque v0.8.0
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[INFO] [stderr]   Downloaded hermit-abi v0.1.17
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[INFO] [stderr]   Downloaded rustc-demangle v0.1.18
[INFO] [stderr]   Downloaded bytemuck v1.4.1
[INFO] [stderr]   Downloaded backtrace v0.3.55
[INFO] [stderr]   Downloaded addr2line v0.14.1
[INFO] [stderr]   Downloaded object v0.22.0
[INFO] [stderr]   Downloaded regex-syntax v0.6.22
[INFO] [stderr]   Downloaded libc v0.2.81
[INFO] [stderr]   Downloaded gimli v0.23.0
[INFO] [stderr]   Downloaded color-eyre v0.5.10
[INFO] [stderr]   Downloaded serde_json v1.0.61
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[INFO] [stderr]   Downloaded miniz_oxide v0.4.3
[INFO] [stderr]   Downloaded tracing v0.1.22
[INFO] [stderr]   Downloaded cc v1.0.66
[INFO] [stderr]   Downloaded loom v0.3.6
[INFO] [stderr]   Downloaded sharded-slab v0.1.0
[INFO] [stderr]   Downloaded tracing-core v0.1.17
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.0
[INFO] [stderr]   Downloaded crossbeam-epoch v0.9.1
[INFO] [stderr]   Downloaded rayon-core v1.9.0
[INFO] [stderr]   Downloaded generator v0.6.23
[INFO] [stderr]   Downloaded eyre v0.6.3
[INFO] [stderr]   Downloaded rand_chacha v0.3.0
[INFO] [stderr]   Downloaded wasi v0.10.1+wasi-snapshot-preview1
[INFO] [stderr]   Downloaded rand_core v0.6.1
[INFO] [stderr]   Downloaded lock_api v0.4.2
[INFO] [stderr]   Downloaded smallvec v1.6.0
[INFO] [stderr]   Downloaded mio v0.7.7
[INFO] [stderr]   Downloaded crossterm v0.18.2
[INFO] [stderr]   Downloaded byteorder v1.4.2
[INFO] [stderr]   Downloaded getrandom v0.2.1
[INFO] [stderr]   Downloaded const_fn v0.4.4
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.1
[INFO] [stderr]   Downloaded quote v1.0.8
[INFO] [stderr]   Downloaded thiserror-impl v1.0.23
[INFO] [stderr]   Downloaded thiserror v1.0.23
[INFO] [stderr]   Downloaded pin-project-lite v0.2.0
[INFO] [stderr]   Downloaded tracing-attributes v0.1.11
[INFO] [stderr]   Downloaded cassowary v0.3.0
[INFO] [stderr]   Downloaded memoffset v0.6.1
[INFO] [stderr]   Downloaded instant v0.1.9
[INFO] [stderr]   Downloaded priority-queue v1.0.5
[INFO] [stderr]   Downloaded rand_hc v0.3.0
[INFO] [stderr]   Downloaded parking_lot_core v0.8.2
[INFO] [stderr]   Downloaded redox_syscall v0.2.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a7a1ff11854d2841a4a308cb438696415fafd6789da023bf1138586aba6cf808
[INFO] running `Command { std: "docker" "start" "-a" "a7a1ff11854d2841a4a308cb438696415fafd6789da023bf1138586aba6cf808", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7a1ff11854d2841a4a308cb438696415fafd6789da023bf1138586aba6cf808", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7a1ff11854d2841a4a308cb438696415fafd6789da023bf1138586aba6cf808", kill_on_drop: false }`
[INFO] [stdout] a7a1ff11854d2841a4a308cb438696415fafd6789da023bf1138586aba6cf808
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a088d87c9965ed032d872c41ab92eebc696d6576f72958d15e9d1a52304ba3b7
[INFO] running `Command { std: "docker" "start" "-a" "a088d87c9965ed032d872c41ab92eebc696d6576f72958d15e9d1a52304ba3b7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling const_fn v0.4.4
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking smallvec v1.6.0
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]     Checking tracing-core v0.1.17
[INFO] [stderr]     Checking sharded-slab v0.1.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking pin-project-lite v0.2.0
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking once_cell v1.5.2
[INFO] [stderr]    Compiling eyre v0.6.3
[INFO] [stderr]    Compiling priority-queue v1.0.5
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]     Checking hashbrown v0.9.1
[INFO] [stderr]     Checking indenter v0.3.1
[INFO] [stderr]     Checking owo-colors v1.2.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking tracing-subscriber v0.2.15
[INFO] [stderr]     Checking cassowary v0.3.0
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]     Checking array_iterator v1.2.0
[INFO] [stderr]     Checking bytemuck v1.4.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking regex-syntax v0.6.22
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking parking_lot_core v0.8.2
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]     Checking mio v0.7.7
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking wait-timeout v0.2.0
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking rand_core v0.6.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking signal-hook v0.1.17
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking crossterm v0.18.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rand v0.8.1
[INFO] [stderr]     Checking tui v0.14.0
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking addr2line v0.14.1
[INFO] [stderr]     Checking backtrace v0.3.55
[INFO] [stderr]     Checking proptest v0.10.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.11
[INFO] [stderr]    Compiling thiserror-impl v1.0.23
[INFO] [stderr]     Checking thiserror v1.0.23
[INFO] [stderr]     Checking tracing v0.1.22
[INFO] [stderr]     Checking tracing-error v0.1.2
[INFO] [stderr]     Checking color-spantrace v0.1.6
[INFO] [stderr]     Checking color-eyre v0.5.10
[INFO] [stderr]     Checking synacor-vm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]    --> src/vm.rs:489:9
[INFO] [stdout]     |
[INFO] [stdout] 489 |     use std::convert::TryFrom;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 493 |     use super::*;
[INFO] [stdout]     |         -------- the item `TryFrom` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` 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 5.35s
[INFO] running `Command { std: "docker" "inspect" "a088d87c9965ed032d872c41ab92eebc696d6576f72958d15e9d1a52304ba3b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a088d87c9965ed032d872c41ab92eebc696d6576f72958d15e9d1a52304ba3b7", kill_on_drop: false }`
[INFO] [stdout] a088d87c9965ed032d872c41ab92eebc696d6576f72958d15e9d1a52304ba3b7