[INFO] cloning repository https://github.com/z4nder/lambda-calculus
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/z4nder/lambda-calculus" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fz4nder%2Flambda-calculus", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fz4nder%2Flambda-calculus'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c572b2bbf38ffef7f418c05175ae5b85df9ac147
[INFO] checking z4nder/lambda-calculus against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fz4nder%2Flambda-calculus" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/z4nder/lambda-calculus 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/z4nder/lambda-calculus
[INFO] finished tweaking git repo https://github.com/z4nder/lambda-calculus
[INFO] tweaked toml for git repo https://github.com/z4nder/lambda-calculus written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/z4nder/lambda-calculus 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-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43c321cd3c7febe52d14ea1cfa3eaf64ca85fa5ccbc514f8a4ccf71032cb0a95
[INFO] running `Command { std: "docker" "start" "-a" "43c321cd3c7febe52d14ea1cfa3eaf64ca85fa5ccbc514f8a4ccf71032cb0a95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43c321cd3c7febe52d14ea1cfa3eaf64ca85fa5ccbc514f8a4ccf71032cb0a95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43c321cd3c7febe52d14ea1cfa3eaf64ca85fa5ccbc514f8a4ccf71032cb0a95", kill_on_drop: false }`
[INFO] [stdout] 43c321cd3c7febe52d14ea1cfa3eaf64ca85fa5ccbc514f8a4ccf71032cb0a95
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19a85b40f1d096ae93c2c247bdfb22f553046189b2a38b9a4d5356c817171fe5
[INFO] running `Command { std: "docker" "start" "-a" "19a85b40f1d096ae93c2c247bdfb22f553046189b2a38b9a4d5356c817171fe5", kill_on_drop: false }`
[INFO] [stderr]     Checking lambda-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "19a85b40f1d096ae93c2c247bdfb22f553046189b2a38b9a4d5356c817171fe5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19a85b40f1d096ae93c2c247bdfb22f553046189b2a38b9a4d5356c817171fe5", kill_on_drop: false }`
[INFO] [stdout] 19a85b40f1d096ae93c2c247bdfb22f553046189b2a38b9a4d5356c817171fe5
[INFO] checking z4nder/lambda-calculus against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fz4nder%2Flambda-calculus" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/z4nder/lambda-calculus 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/z4nder/lambda-calculus
[INFO] finished tweaking git repo https://github.com/z4nder/lambda-calculus
[INFO] tweaked toml for git repo https://github.com/z4nder/lambda-calculus written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/z4nder/lambda-calculus 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-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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cbc31b6b7bdf47c10a5c9da8d099b50f3cfd04a635d158186a50f342dc6aa1f2
[INFO] running `Command { std: "docker" "start" "-a" "cbc31b6b7bdf47c10a5c9da8d099b50f3cfd04a635d158186a50f342dc6aa1f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cbc31b6b7bdf47c10a5c9da8d099b50f3cfd04a635d158186a50f342dc6aa1f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbc31b6b7bdf47c10a5c9da8d099b50f3cfd04a635d158186a50f342dc6aa1f2", kill_on_drop: false }`
[INFO] [stdout] cbc31b6b7bdf47c10a5c9da8d099b50f3cfd04a635d158186a50f342dc6aa1f2
[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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 50f6548a9f20c60c47e8bd5979446dfb6a71df32de25f672247f27819db77371
[INFO] running `Command { std: "docker" "start" "-a" "50f6548a9f20c60c47e8bd5979446dfb6a71df32de25f672247f27819db77371", kill_on_drop: false }`
[INFO] [stderr]     Checking lambda-parser v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/parser.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 | /             match token {
[INFO] [stdout] 70 | |                 Token::LParen => return Ok(parse_paren(tokens)?),
[INFO] [stdout] 71 | |                 Token::Var(var) =>  return Ok(parse_var(tokens.clone(), var)),
[INFO] [stdout] 72 | |                 Token::Int(value) =>  return Ok(parse_int(tokens.clone(), value)),
[INFO] [stdout] ...  |
[INFO] [stdout] 77 | |                 Token::Minus => return Ok(parse_var(tokens.clone(), &"-".to_string())),      
[INFO] [stdout] 78 | |             };
[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] [stderr] error: could not compile `lambda-parser` (bin "lambda-parser") due to 2 previous errors
[INFO] [stdout] error[E0282]: type annotations needed
[INFO] [stdout]   --> src/parser.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 | /             match token {
[INFO] [stdout] 70 | |                 Token::LParen => return Ok(parse_paren(tokens)?),
[INFO] [stdout] 71 | |                 Token::Var(var) =>  return Ok(parse_var(tokens.clone(), var)),
[INFO] [stdout] 72 | |                 Token::Int(value) =>  return Ok(parse_int(tokens.clone(), value)),
[INFO] [stdout] ...  |
[INFO] [stdout] 77 | |                 Token::Minus => return Ok(parse_var(tokens.clone(), &"-".to_string())),      
[INFO] [stdout] 78 | |             };
[INFO] [stdout]    | |_____________^ cannot infer type
[INFO] [stdout] 
[INFO] [stdout] 
[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 E0282`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lambda-parser` (bin "lambda-parser" test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "50f6548a9f20c60c47e8bd5979446dfb6a71df32de25f672247f27819db77371", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50f6548a9f20c60c47e8bd5979446dfb6a71df32de25f672247f27819db77371", kill_on_drop: false }`
[INFO] [stdout] 50f6548a9f20c60c47e8bd5979446dfb6a71df32de25f672247f27819db77371