[INFO] cloning repository https://github.com/psushi/kai
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/psushi/kai" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsushi%2Fkai", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsushi%2Fkai'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e6144d9b04c8397b7b6195d9c8794b69f80277e2
[INFO] checking psushi/kai against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsushi%2Fkai" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/psushi/kai 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/psushi/kai
[INFO] finished tweaking git repo https://github.com/psushi/kai
[INFO] tweaked toml for git repo https://github.com/psushi/kai written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/psushi/kai 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] 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 919ee46426f60702d91d3c7ba22b341c53e9c12ba2ffbd2902eaa3da672e3c31
[INFO] running `Command { std: "docker" "start" "-a" "919ee46426f60702d91d3c7ba22b341c53e9c12ba2ffbd2902eaa3da672e3c31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "919ee46426f60702d91d3c7ba22b341c53e9c12ba2ffbd2902eaa3da672e3c31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "919ee46426f60702d91d3c7ba22b341c53e9c12ba2ffbd2902eaa3da672e3c31", kill_on_drop: false }`
[INFO] [stdout] 919ee46426f60702d91d3c7ba22b341c53e9c12ba2ffbd2902eaa3da672e3c31
[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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7e604e2f659b55d6b449ad1425758537695a85dae8d5ce86bbd3679d625dcf30
[INFO] running `Command { std: "docker" "start" "-a" "7e604e2f659b55d6b449ad1425758537695a85dae8d5ce86bbd3679d625dcf30", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling libc v0.2.127
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]    Compiling eyre v0.6.8
[INFO] [stderr]     Checking owo-colors v3.4.0
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking tracing v0.1.36
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.15
[INFO] [stderr]     Checking tracing-error v0.2.0
[INFO] [stderr]     Checking color-spantrace v0.2.0
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]     Checking color-eyre v0.6.2
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]     Checking kai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `format`
[INFO] [stdout]  --> src/expression.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{format, Display};
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `format`
[INFO] [stdout]  --> src/expression.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{format, Display};
[INFO] [stdout]   |                ^^^^^^
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.13s
[INFO] running `Command { std: "docker" "inspect" "7e604e2f659b55d6b449ad1425758537695a85dae8d5ce86bbd3679d625dcf30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e604e2f659b55d6b449ad1425758537695a85dae8d5ce86bbd3679d625dcf30", kill_on_drop: false }`
[INFO] [stdout] 7e604e2f659b55d6b449ad1425758537695a85dae8d5ce86bbd3679d625dcf30
[INFO] checking psushi/kai against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpsushi%2Fkai" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/psushi/kai 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/psushi/kai
[INFO] finished tweaking git repo https://github.com/psushi/kai
[INFO] tweaked toml for git repo https://github.com/psushi/kai written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/psushi/kai 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] f33bd96ab4f79442b5612c966a4045a958399e64bc54da9c420b7ffcb24a351b
[INFO] running `Command { std: "docker" "start" "-a" "f33bd96ab4f79442b5612c966a4045a958399e64bc54da9c420b7ffcb24a351b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f33bd96ab4f79442b5612c966a4045a958399e64bc54da9c420b7ffcb24a351b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f33bd96ab4f79442b5612c966a4045a958399e64bc54da9c420b7ffcb24a351b", kill_on_drop: false }`
[INFO] [stdout] f33bd96ab4f79442b5612c966a4045a958399e64bc54da9c420b7ffcb24a351b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] f941cac39c06c4891c1852f4da90fb463070365f84d5a7908d331f736630153f
[INFO] running `Command { std: "docker" "start" "-a" "f941cac39c06c4891c1852f4da90fb463070365f84d5a7908d331f736630153f", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.13.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]    Compiling libc v0.2.127
[INFO] [stderr]    Compiling backtrace v0.3.66
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]    Compiling eyre v0.6.8
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking owo-colors v3.4.0
[INFO] [stderr]     Checking miniz_oxide v0.5.3
[INFO] [stderr]     Checking tracing-core v0.1.29
[INFO] [stderr]     Checking thread_local v1.1.4
[INFO] [stderr]     Checking tracing v0.1.36
[INFO] [stderr]     Checking tracing-subscriber v0.3.15
[INFO] [stderr]     Checking object v0.29.0
[INFO] [stderr]     Checking tracing-error v0.2.0
[INFO] [stderr]     Checking color-spantrace v0.2.0
[INFO] [stderr]     Checking addr2line v0.17.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.32
[INFO] [stderr]     Checking color-eyre v0.6.2
[INFO] [stderr]     Checking thiserror v1.0.32
[INFO] [stderr]     Checking kai v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `format`
[INFO] [stdout]  --> src/expression.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{format, Display};
[INFO] [stdout]   |                ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `format`
[INFO] [stdout]  --> src/expression.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::{format, Display};
[INFO] [stdout]   |                ^^^^^^
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.22s
[INFO] running `Command { std: "docker" "inspect" "f941cac39c06c4891c1852f4da90fb463070365f84d5a7908d331f736630153f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f941cac39c06c4891c1852f4da90fb463070365f84d5a7908d331f736630153f", kill_on_drop: false }`
[INFO] [stdout] f941cac39c06c4891c1852f4da90fb463070365f84d5a7908d331f736630153f