[INFO] cloning repository https://github.com/lowczarc/computerv1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lowczarc/computerv1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flowczarc%2Fcomputerv1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flowczarc%2Fcomputerv1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 310a15f81e92568434da9c072c748de0a64497b9
[INFO] checking lowczarc/computerv1 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flowczarc%2Fcomputerv1" "/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/lowczarc/computerv1 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/lowczarc/computerv1
[INFO] finished tweaking git repo https://github.com/lowczarc/computerv1
[INFO] tweaked toml for git repo https://github.com/lowczarc/computerv1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/lowczarc/computerv1 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-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] bc0c8eec6df2db7ee2e79e32c99cd5c146691ed37b56d6a0e95fc174398cca40
[INFO] running `Command { std: "docker" "start" "-a" "bc0c8eec6df2db7ee2e79e32c99cd5c146691ed37b56d6a0e95fc174398cca40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc0c8eec6df2db7ee2e79e32c99cd5c146691ed37b56d6a0e95fc174398cca40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc0c8eec6df2db7ee2e79e32c99cd5c146691ed37b56d6a0e95fc174398cca40", kill_on_drop: false }`
[INFO] [stdout] bc0c8eec6df2db7ee2e79e32c99cd5c146691ed37b56d6a0e95fc174398cca40
[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] 2efc4243c8ac6d4df7fd4292315b96b139c2dfa4dc4a388c5df5fa87c7e2d0a1
[INFO] running `Command { std: "docker" "start" "-a" "2efc4243c8ac6d4df7fd4292315b96b139c2dfa4dc4a388c5df5fa87c7e2d0a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]     Checking regex-syntax v0.6.13
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking regex v1.3.3
[INFO] [stderr]     Checking computerv1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `BadDegree` is never constructed
[INFO] [stdout]  --> src/polynomes.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum Error {
[INFO] [stdout]   |          ----- variant in this enum
[INFO] [stdout] 9 |     BadDegree,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[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: variant `BadDegree` is never constructed
[INFO] [stdout]  --> src/polynomes.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum Error {
[INFO] [stdout]   |          ----- variant in this enum
[INFO] [stdout] 9 |     BadDegree,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[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 3.96s
[INFO] running `Command { std: "docker" "inspect" "2efc4243c8ac6d4df7fd4292315b96b139c2dfa4dc4a388c5df5fa87c7e2d0a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2efc4243c8ac6d4df7fd4292315b96b139c2dfa4dc4a388c5df5fa87c7e2d0a1", kill_on_drop: false }`
[INFO] [stdout] 2efc4243c8ac6d4df7fd4292315b96b139c2dfa4dc4a388c5df5fa87c7e2d0a1
[INFO] checking lowczarc/computerv1 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flowczarc%2Fcomputerv1" "/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/lowczarc/computerv1 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/lowczarc/computerv1
[INFO] finished tweaking git repo https://github.com/lowczarc/computerv1
[INFO] tweaked toml for git repo https://github.com/lowczarc/computerv1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/lowczarc/computerv1 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] 4662449d79fc0c1734603fb50dfaa06dcd37243acd0e07ce869023fdc0cbe511
[INFO] running `Command { std: "docker" "start" "-a" "4662449d79fc0c1734603fb50dfaa06dcd37243acd0e07ce869023fdc0cbe511", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4662449d79fc0c1734603fb50dfaa06dcd37243acd0e07ce869023fdc0cbe511", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4662449d79fc0c1734603fb50dfaa06dcd37243acd0e07ce869023fdc0cbe511", kill_on_drop: false }`
[INFO] [stdout] 4662449d79fc0c1734603fb50dfaa06dcd37243acd0e07ce869023fdc0cbe511
[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] ba08efe7d4c0ff57fe3da3ccb231fda2ecafb8c23b815f134f9e186d797dc4e3
[INFO] running `Command { std: "docker" "start" "-a" "ba08efe7d4c0ff57fe3da3ccb231fda2ecafb8c23b815f134f9e186d797dc4e3", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking regex-syntax v0.6.13
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking regex v1.3.3
[INFO] [stderr]     Checking computerv1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `BadDegree` is never constructed
[INFO] [stdout]  --> src/polynomes.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum Error {
[INFO] [stdout]   |          ----- variant in this enum
[INFO] [stdout] 9 |     BadDegree,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[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: variant `BadDegree` is never constructed
[INFO] [stdout]  --> src/polynomes.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub enum Error {
[INFO] [stdout]   |          ----- variant in this enum
[INFO] [stdout] 9 |     BadDegree,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[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 3.46s
[INFO] running `Command { std: "docker" "inspect" "ba08efe7d4c0ff57fe3da3ccb231fda2ecafb8c23b815f134f9e186d797dc4e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba08efe7d4c0ff57fe3da3ccb231fda2ecafb8c23b815f134f9e186d797dc4e3", kill_on_drop: false }`
[INFO] [stdout] ba08efe7d4c0ff57fe3da3ccb231fda2ecafb8c23b815f134f9e186d797dc4e3