[INFO] cloning repository https://github.com/brenoafb/rust-container-runtime
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brenoafb/rust-container-runtime" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrenoafb%2Frust-container-runtime", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrenoafb%2Frust-container-runtime'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6474902f8e8fe88e4282e8bf3f7ae6977c37608d
[INFO] checking brenoafb/rust-container-runtime against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrenoafb%2Frust-container-runtime" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brenoafb/rust-container-runtime 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/brenoafb/rust-container-runtime
[INFO] finished tweaking git repo https://github.com/brenoafb/rust-container-runtime
[INFO] tweaked toml for git repo https://github.com/brenoafb/rust-container-runtime written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/brenoafb/rust-container-runtime 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 unshare v0.7.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 9e83e9430b9675221189f2789ee783ae31e389627c82aa1d8e85cdbe1180872a
[INFO] running `Command { std: "docker" "start" "-a" "9e83e9430b9675221189f2789ee783ae31e389627c82aa1d8e85cdbe1180872a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e83e9430b9675221189f2789ee783ae31e389627c82aa1d8e85cdbe1180872a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e83e9430b9675221189f2789ee783ae31e389627c82aa1d8e85cdbe1180872a", kill_on_drop: false }`
[INFO] [stdout] 9e83e9430b9675221189f2789ee783ae31e389627c82aa1d8e85cdbe1180872a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 6a68322ded8b5021e096483c02031e1a3e6db48aa9493cb42c96e85fb74c2869
[INFO] running `Command { std: "docker" "start" "-a" "6a68322ded8b5021e096483c02031e1a3e6db48aa9493cb42c96e85fb74c2869", kill_on_drop: false }`
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]     Checking nix v0.20.2
[INFO] [stderr]     Checking nix v0.25.0
[INFO] [stderr]     Checking unshare v0.7.0
[INFO] [stderr]     Checking containers-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.42s
[INFO] running `Command { std: "docker" "inspect" "6a68322ded8b5021e096483c02031e1a3e6db48aa9493cb42c96e85fb74c2869", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a68322ded8b5021e096483c02031e1a3e6db48aa9493cb42c96e85fb74c2869", kill_on_drop: false }`
[INFO] [stdout] 6a68322ded8b5021e096483c02031e1a3e6db48aa9493cb42c96e85fb74c2869
[INFO] checking brenoafb/rust-container-runtime against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrenoafb%2Frust-container-runtime" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/brenoafb/rust-container-runtime on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/brenoafb/rust-container-runtime
[INFO] finished tweaking git repo https://github.com/brenoafb/rust-container-runtime
[INFO] tweaked toml for git repo https://github.com/brenoafb/rust-container-runtime written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/brenoafb/rust-container-runtime 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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b242a647264f32093b48b3e5bbe1f417f5e95f991f222bdd246d0453a314e5f7
[INFO] running `Command { std: "docker" "start" "-a" "b242a647264f32093b48b3e5bbe1f417f5e95f991f222bdd246d0453a314e5f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b242a647264f32093b48b3e5bbe1f417f5e95f991f222bdd246d0453a314e5f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b242a647264f32093b48b3e5bbe1f417f5e95f991f222bdd246d0453a314e5f7", kill_on_drop: false }`
[INFO] [stdout] b242a647264f32093b48b3e5bbe1f417f5e95f991f222bdd246d0453a314e5f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3e094d31eb98af6f41647ee4931a3d640d61ae57d81fb0b244f1775f79a040f
[INFO] running `Command { std: "docker" "start" "-a" "b3e094d31eb98af6f41647ee4931a3d640d61ae57d81fb0b244f1775f79a040f", kill_on_drop: false }`
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling libc v0.2.133
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking nix v0.20.2
[INFO] [stderr]     Checking nix v0.25.0
[INFO] [stderr]     Checking unshare v0.7.0
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/unshare-0.7.0/src/child.rs:254:5
[INFO] [stdout]     |
[INFO] [stdout] 254 | /     if pid == 0 {
[INFO] [stdout] 255 | |         buf[buf.len()-2] = b'0';
[INFO] [stdout] 256 | |         return &buf[buf.len()-2..]
[INFO] [stdout] 257 | |     } else {
[INFO] [stdout] ...   |
[INFO] [stdout] 267 | |         unreachable!("can't format pid");
[INFO] [stdout] 268 | |     };
[INFO] [stdout]     | |_____^ cannot satisfy `_ -> _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `unshare` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "b3e094d31eb98af6f41647ee4931a3d640d61ae57d81fb0b244f1775f79a040f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3e094d31eb98af6f41647ee4931a3d640d61ae57d81fb0b244f1775f79a040f", kill_on_drop: false }`
[INFO] [stdout] b3e094d31eb98af6f41647ee4931a3d640d61ae57d81fb0b244f1775f79a040f