[INFO] cloning repository https://github.com/lcnr/cobalt
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lcnr/cobalt" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flcnr%2Fcobalt", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flcnr%2Fcobalt'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f227a6d1ba75dc7d6b02bf41d48af9962a9b8ff3
[INFO] checking lcnr/cobalt against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flcnr%2Fcobalt" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lcnr/cobalt on toolchain 3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lcnr/cobalt
[INFO] finished tweaking git repo https://github.com/lcnr/cobalt
[INFO] tweaked toml for git repo https://github.com/lcnr/cobalt written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/lcnr/cobalt already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/lcnr/tindex/`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 13f9977a49d5c41e728ea14f2bbc2482da79c4b14dd1037f24a8113203459616
[INFO] running `Command { std: "docker" "start" "-a" "13f9977a49d5c41e728ea14f2bbc2482da79c4b14dd1037f24a8113203459616", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13f9977a49d5c41e728ea14f2bbc2482da79c4b14dd1037f24a8113203459616", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13f9977a49d5c41e728ea14f2bbc2482da79c4b14dd1037f24a8113203459616", kill_on_drop: false }`
[INFO] [stdout] 13f9977a49d5c41e728ea14f2bbc2482da79c4b14dd1037f24a8113203459616
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67b489a160ed3964d5877fc00e1cfa66ec077e231f298912a7917b70fca4587f
[INFO] running `Command { std: "docker" "start" "-a" "67b489a160ed3964d5877fc00e1cfa66ec077e231f298912a7917b70fca4587f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling beef v0.5.0
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]     Checking tindex v0.1.0 (https://github.com/lcnr/tindex/#659e7543)
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]     Checking co_diag v0.1.0 (/opt/rustwide/workdir/co_diag)
[INFO] [stderr]     Checking co_ast v0.1.0 (/opt/rustwide/workdir/co_ast)
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stdout] warning: unused variable: `arg`
[INFO] [stdout]   --> co_ast/src/typeck.rs:79:32
[INFO] [stdout]    |
[INFO] [stdout] 79 |                 Res::LambdaArg(arg) => unreachable!(),
[INFO] [stdout]    |                                ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[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] [stdout] warning: unused variable: `arg`
[INFO] [stdout]   --> co_ast/src/typeck.rs:79:32
[INFO] [stdout]    |
[INFO] [stdout] 79 |                 Res::LambdaArg(arg) => unreachable!(),
[INFO] [stdout]    |                                ^^^ help: if this is intentional, prefix it with an underscore: `_arg`
[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]    Compiling logos-derive v0.12.0
[INFO] [stderr]     Checking logos v0.12.0
[INFO] [stderr]     Checking co_parse v0.1.0 (/opt/rustwide/workdir/co_parse)
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]    --> co_parse/src/lib.rs:153:59
[INFO] [stdout]     |
[INFO] [stdout] 153 |         (Token::Lambda | Token::Ident(_) | Token::LBrace, span) => parse_expr(lex, Some(expr)),
[INFO] [stdout]     |                                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]    --> co_parse/src/lib.rs:153:59
[INFO] [stdout]     |
[INFO] [stdout] 153 |         (Token::Lambda | Token::Ident(_) | Token::LBrace, span) => parse_expr(lex, Some(expr)),
[INFO] [stdout]     |                                                           ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking cobalt v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.03s
[INFO] running `Command { std: "docker" "inspect" "67b489a160ed3964d5877fc00e1cfa66ec077e231f298912a7917b70fca4587f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67b489a160ed3964d5877fc00e1cfa66ec077e231f298912a7917b70fca4587f", kill_on_drop: false }`
[INFO] [stdout] 67b489a160ed3964d5877fc00e1cfa66ec077e231f298912a7917b70fca4587f