[INFO] fetching crate cmd-utils 0.3.1...
[INFO] checking cmd-utils-0.3.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate cmd-utils 0.3.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate cmd-utils 0.3.1 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 crates.io crate cmd-utils 0.3.1
[INFO] finished tweaking crates.io crate cmd-utils 0.3.1
[INFO] tweaked toml for crates.io crate cmd-utils 0.3.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate crates.io crate cmd-utils 0.3.1 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] 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ac2ecd1d2a01f39c3ae17e1d510d1e287e700147f7ce0225fa3278bc74911f5e
[INFO] running `Command { std: "docker" "start" "-a" "ac2ecd1d2a01f39c3ae17e1d510d1e287e700147f7ce0225fa3278bc74911f5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac2ecd1d2a01f39c3ae17e1d510d1e287e700147f7ce0225fa3278bc74911f5e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac2ecd1d2a01f39c3ae17e1d510d1e287e700147f7ce0225fa3278bc74911f5e", kill_on_drop: false }`
[INFO] [stdout] ac2ecd1d2a01f39c3ae17e1d510d1e287e700147f7ce0225fa3278bc74911f5e
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54e501c1b86fdd93976a6a3d0ef09d5fac4d1224dd4377c25d0ff86ab3bade91
[INFO] running `Command { std: "docker" "start" "-a" "54e501c1b86fdd93976a6a3d0ef09d5fac4d1224dd4377c25d0ff86ab3bade91", kill_on_drop: false }`
[INFO] [stderr]     Checking cmd-utils v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "54e501c1b86fdd93976a6a3d0ef09d5fac4d1224dd4377c25d0ff86ab3bade91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54e501c1b86fdd93976a6a3d0ef09d5fac4d1224dd4377c25d0ff86ab3bade91", kill_on_drop: false }`
[INFO] [stdout] 54e501c1b86fdd93976a6a3d0ef09d5fac4d1224dd4377c25d0ff86ab3bade91
[INFO] checking cmd-utils-0.3.1 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate cmd-utils 0.3.1 into /workspace/builds/worker-0-tc2/source
[INFO] validating manifest of crates.io crate cmd-utils 0.3.1 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 crates.io crate cmd-utils 0.3.1
[INFO] finished tweaking crates.io crate cmd-utils 0.3.1
[INFO] tweaked toml for crates.io crate cmd-utils 0.3.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate crates.io crate cmd-utils 0.3.1 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-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39cb374ec9ab3568879e6b36040edc81570d69b22898843993813297dcaf7767
[INFO] running `Command { std: "docker" "start" "-a" "39cb374ec9ab3568879e6b36040edc81570d69b22898843993813297dcaf7767", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39cb374ec9ab3568879e6b36040edc81570d69b22898843993813297dcaf7767", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39cb374ec9ab3568879e6b36040edc81570d69b22898843993813297dcaf7767", kill_on_drop: false }`
[INFO] [stdout] 39cb374ec9ab3568879e6b36040edc81570d69b22898843993813297dcaf7767
[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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8716bab66bea7ab454c79716230c91d3ce11204391e60e1c5075b615c8c18560
[INFO] running `Command { std: "docker" "start" "-a" "8716bab66bea7ab454c79716230c91d3ce11204391e60e1c5075b615c8c18560", kill_on_drop: false }`
[INFO] [stderr]     Checking cmd-utils v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]   --> src/cmd_spawn.rs:83:21
[INFO] [stdout]    |
[INFO] [stdout] 83 |                     return Ok(())
[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] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]   --> src/cmd_spawn.rs:83:21
[INFO] [stdout]    |
[INFO] [stdout] 83 |                     return Ok(())
[INFO] [stdout]    |                     ^^^^^^^^^^^^^ cannot satisfy `_ -> _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cmd-utils` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 `cmd-utils` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "8716bab66bea7ab454c79716230c91d3ce11204391e60e1c5075b615c8c18560", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8716bab66bea7ab454c79716230c91d3ce11204391e60e1c5075b615c8c18560", kill_on_drop: false }`
[INFO] [stdout] 8716bab66bea7ab454c79716230c91d3ce11204391e60e1c5075b615c8c18560