[INFO] cloning repository https://github.com/binarycleric/cat-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/binarycleric/cat-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinarycleric%2Fcat-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinarycleric%2Fcat-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 61018842fa41d6282f2dc6e559e9bf2efd7e3971
[INFO] checking binarycleric/cat-rs against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinarycleric%2Fcat-rs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/binarycleric/cat-rs 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/binarycleric/cat-rs
[INFO] finished tweaking git repo https://github.com/binarycleric/cat-rs
[INFO] tweaked toml for git repo https://github.com/binarycleric/cat-rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/binarycleric/cat-rs 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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] c3a3cf3c88adb90b6d6163797ad34667800462727b3245086509196942dceed6
[INFO] running `Command { std: "docker" "start" "-a" "c3a3cf3c88adb90b6d6163797ad34667800462727b3245086509196942dceed6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3a3cf3c88adb90b6d6163797ad34667800462727b3245086509196942dceed6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3a3cf3c88adb90b6d6163797ad34667800462727b3245086509196942dceed6", kill_on_drop: false }`
[INFO] [stdout] c3a3cf3c88adb90b6d6163797ad34667800462727b3245086509196942dceed6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] e03809cf36438432a68052947d8ac289f7329372f19a2b72d6c598bafb09a691
[INFO] running `Command { std: "docker" "start" "-a" "e03809cf36438432a68052947d8ac289f7329372f19a2b72d6c598bafb09a691", kill_on_drop: false }`
[INFO] [stderr]     Checking cat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] running `Command { std: "docker" "inspect" "e03809cf36438432a68052947d8ac289f7329372f19a2b72d6c598bafb09a691", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e03809cf36438432a68052947d8ac289f7329372f19a2b72d6c598bafb09a691", kill_on_drop: false }`
[INFO] [stdout] e03809cf36438432a68052947d8ac289f7329372f19a2b72d6c598bafb09a691
[INFO] checking binarycleric/cat-rs against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbinarycleric%2Fcat-rs" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/binarycleric/cat-rs 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/binarycleric/cat-rs
[INFO] finished tweaking git repo https://github.com/binarycleric/cat-rs
[INFO] tweaked toml for git repo https://github.com/binarycleric/cat-rs written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/binarycleric/cat-rs 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 45edac9f2938523b1e56c46b955841373f6995579310300cb72f2bb5ba12e822
[INFO] running `Command { std: "docker" "start" "-a" "45edac9f2938523b1e56c46b955841373f6995579310300cb72f2bb5ba12e822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "45edac9f2938523b1e56c46b955841373f6995579310300cb72f2bb5ba12e822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45edac9f2938523b1e56c46b955841373f6995579310300cb72f2bb5ba12e822", kill_on_drop: false }`
[INFO] [stdout] 45edac9f2938523b1e56c46b955841373f6995579310300cb72f2bb5ba12e822
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 71dca176f5570f88aa9b2e39ebb948a3f0f491994bb3cbf4268cb80863dc06e3
[INFO] running `Command { std: "docker" "start" "-a" "71dca176f5570f88aa9b2e39ebb948a3f0f491994bb3cbf4268cb80863dc06e3", kill_on_drop: false }`
[INFO] [stderr]     Checking cat v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | /     match file { 
[INFO] [stdout] 39 | |         Ok(f) => {
[INFO] [stdout] 40 | |             return file_contents(f);
[INFO] [stdout] 41 | |         },
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | |         }
[INFO] [stdout] 46 | |     };
[INFO] [stdout]    | |_____^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/main.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | /     match file { 
[INFO] [stdout] 39 | |         Ok(f) => {
[INFO] [stdout] 40 | |             return file_contents(f);
[INFO] [stdout] 41 | |         },
[INFO] [stdout] ...  |
[INFO] [stdout] 45 | |         }
[INFO] [stdout] 46 | |     };
[INFO] [stdout]    | |_____^ cannot infer type
[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 E0282`.
[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 E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cat` (bin "cat") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `cat` (bin "cat" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "71dca176f5570f88aa9b2e39ebb948a3f0f491994bb3cbf4268cb80863dc06e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71dca176f5570f88aa9b2e39ebb948a3f0f491994bb3cbf4268cb80863dc06e3", kill_on_drop: false }`
[INFO] [stdout] 71dca176f5570f88aa9b2e39ebb948a3f0f491994bb3cbf4268cb80863dc06e3