[INFO] fetching crate simple-triple-buffer 0.1.0...
[INFO] checking simple-triple-buffer-0.1.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate simple-triple-buffer 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate simple-triple-buffer 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 simple-triple-buffer 0.1.0
[INFO] finished tweaking crates.io crate simple-triple-buffer 0.1.0
[INFO] tweaked toml for crates.io crate simple-triple-buffer 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate simple-triple-buffer 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 0d697cdbee6817ed1926cbfa9a089cc8ddfb76deb9ed435aa05ab3ed6791a576
[INFO] running `Command { std: "docker" "start" "-a" "0d697cdbee6817ed1926cbfa9a089cc8ddfb76deb9ed435aa05ab3ed6791a576", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d697cdbee6817ed1926cbfa9a089cc8ddfb76deb9ed435aa05ab3ed6791a576", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d697cdbee6817ed1926cbfa9a089cc8ddfb76deb9ed435aa05ab3ed6791a576", kill_on_drop: false }`
[INFO] [stdout] 0d697cdbee6817ed1926cbfa9a089cc8ddfb76deb9ed435aa05ab3ed6791a576
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 0d326437786277956a99f927df6d72370567d8114798fac0bf20b129a533c6c9
[INFO] running `Command { std: "docker" "start" "-a" "0d326437786277956a99f927df6d72370567d8114798fac0bf20b129a533c6c9", kill_on_drop: false }`
[INFO] [stderr]     Checking simple-triple-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "0d326437786277956a99f927df6d72370567d8114798fac0bf20b129a533c6c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d326437786277956a99f927df6d72370567d8114798fac0bf20b129a533c6c9", kill_on_drop: false }`
[INFO] [stdout] 0d326437786277956a99f927df6d72370567d8114798fac0bf20b129a533c6c9
[INFO] checking simple-triple-buffer-0.1.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate simple-triple-buffer 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate simple-triple-buffer 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 simple-triple-buffer 0.1.0
[INFO] finished tweaking crates.io crate simple-triple-buffer 0.1.0
[INFO] tweaked toml for crates.io crate simple-triple-buffer 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] crate crates.io crate simple-triple-buffer 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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 33df6e9a9f6b4d7e77c842fdc9e7c7fe2231bbcab4429c08bc63f75ddc3bcd7c
[INFO] running `Command { std: "docker" "start" "-a" "33df6e9a9f6b4d7e77c842fdc9e7c7fe2231bbcab4429c08bc63f75ddc3bcd7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33df6e9a9f6b4d7e77c842fdc9e7c7fe2231bbcab4429c08bc63f75ddc3bcd7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33df6e9a9f6b4d7e77c842fdc9e7c7fe2231bbcab4429c08bc63f75ddc3bcd7c", kill_on_drop: false }`
[INFO] [stdout] 33df6e9a9f6b4d7e77c842fdc9e7c7fe2231bbcab4429c08bc63f75ddc3bcd7c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] e9dd95d0d0f2598420087229e5a35a2257d5c1a3adc1b33e352cc2efdf3bea74
[INFO] running `Command { std: "docker" "start" "-a" "e9dd95d0d0f2598420087229e5a35a2257d5c1a3adc1b33e352cc2efdf3bea74", kill_on_drop: false }`
[INFO] [stderr]     Checking simple-triple-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `tr`
[INFO] [stdout]   --> examples/counter.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let tr = std::thread::spawn(move || {
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_tr`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` 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 0.31s
[INFO] running `Command { std: "docker" "inspect" "e9dd95d0d0f2598420087229e5a35a2257d5c1a3adc1b33e352cc2efdf3bea74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e9dd95d0d0f2598420087229e5a35a2257d5c1a3adc1b33e352cc2efdf3bea74", kill_on_drop: false }`
[INFO] [stdout] e9dd95d0d0f2598420087229e5a35a2257d5c1a3adc1b33e352cc2efdf3bea74