[INFO] fetching crate sat_lab 0.1.0...
[INFO] checking sat_lab-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate sat_lab 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate sat_lab 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 sat_lab 0.1.0
[INFO] finished tweaking crates.io crate sat_lab 0.1.0
[INFO] tweaked toml for crates.io crate sat_lab 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate sat_lab 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bool_vec v0.2.1
[INFO] [stderr]   Downloaded count-macro v0.2.2
[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] ae3153f60b0e2c687248a7fbd3cd9693d1a9f3c4d245be7b3c0b134c5ee6b2eb
[INFO] running `Command { std: "docker" "start" "-a" "ae3153f60b0e2c687248a7fbd3cd9693d1a9f3c4d245be7b3c0b134c5ee6b2eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae3153f60b0e2c687248a7fbd3cd9693d1a9f3c4d245be7b3c0b134c5ee6b2eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae3153f60b0e2c687248a7fbd3cd9693d1a9f3c4d245be7b3c0b134c5ee6b2eb", kill_on_drop: false }`
[INFO] [stdout] ae3153f60b0e2c687248a7fbd3cd9693d1a9f3c4d245be7b3c0b134c5ee6b2eb
[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] efb9a62462e6cd4d7cef63f813eac898b1d346df33e078260cbe1f66eb346dfe
[INFO] running `Command { std: "docker" "start" "-a" "efb9a62462e6cd4d7cef63f813eac898b1d346df33e078260cbe1f66eb346dfe", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling regex-syntax v0.7.2
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]    Compiling regex v1.8.4
[INFO] [stderr]    Compiling count-macro v0.2.2
[INFO] [stderr]     Checking bool_vec v0.2.1
[INFO] [stderr]     Checking sat_lab v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BoolVec` is imported redundantly
[INFO] [stdout]    --> src/clause.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     use super::*;
[INFO] [stdout]     |         -------- the item `BoolVec` is already imported here
[INFO] [stdout] 107 |     use bool_vec::BoolVec;
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.32s
[INFO] running `Command { std: "docker" "inspect" "efb9a62462e6cd4d7cef63f813eac898b1d346df33e078260cbe1f66eb346dfe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efb9a62462e6cd4d7cef63f813eac898b1d346df33e078260cbe1f66eb346dfe", kill_on_drop: false }`
[INFO] [stdout] efb9a62462e6cd4d7cef63f813eac898b1d346df33e078260cbe1f66eb346dfe
[INFO] checking sat_lab-0.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate sat_lab 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate sat_lab 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 sat_lab 0.1.0
[INFO] finished tweaking crates.io crate sat_lab 0.1.0
[INFO] tweaked toml for crates.io crate sat_lab 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate sat_lab 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] b3d25350a614eaadd0986873110a4699334f97351ba562ee11515872c62d8658
[INFO] running `Command { std: "docker" "start" "-a" "b3d25350a614eaadd0986873110a4699334f97351ba562ee11515872c62d8658", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b3d25350a614eaadd0986873110a4699334f97351ba562ee11515872c62d8658", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3d25350a614eaadd0986873110a4699334f97351ba562ee11515872c62d8658", kill_on_drop: false }`
[INFO] [stdout] b3d25350a614eaadd0986873110a4699334f97351ba562ee11515872c62d8658
[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] b71eb94ef285badcff52b702d35611425fe3e444848b4717ba1d1a2d81413467
[INFO] running `Command { std: "docker" "start" "-a" "b71eb94ef285badcff52b702d35611425fe3e444848b4717ba1d1a2d81413467", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling regex-syntax v0.7.2
[INFO] [stderr]    Compiling once_cell v1.18.0
[INFO] [stderr]    Compiling aho-corasick v1.0.2
[INFO] [stderr]    Compiling regex v1.8.4
[INFO] [stderr]    Compiling count-macro v0.2.2
[INFO] [stderr]     Checking bool_vec v0.2.1
[INFO] [stderr]     Checking sat_lab v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `BoolVec` is imported redundantly
[INFO] [stdout]    --> src/clause.rs:107:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     use super::*;
[INFO] [stdout]     |         -------- the item `BoolVec` is already imported here
[INFO] [stdout] 107 |     use bool_vec::BoolVec;
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.26s
[INFO] running `Command { std: "docker" "inspect" "b71eb94ef285badcff52b702d35611425fe3e444848b4717ba1d1a2d81413467", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b71eb94ef285badcff52b702d35611425fe3e444848b4717ba1d1a2d81413467", kill_on_drop: false }`
[INFO] [stdout] b71eb94ef285badcff52b702d35611425fe3e444848b4717ba1d1a2d81413467