[INFO] fetching crate test_pairs 0.1.0...
[INFO] building test_pairs-0.1.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate test_pairs 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate test_pairs 0.1.0
[INFO] finished tweaking crates.io crate test_pairs 0.1.0
[INFO] tweaked toml for crates.io crate test_pairs 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate test_pairs 0.1.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c1474edd9028bfb24d046200e88a4ea8c8c4a9ca7c348578680d143bcedeb779
[INFO] running `Command { std: "docker" "start" "-a" "c1474edd9028bfb24d046200e88a4ea8c8c4a9ca7c348578680d143bcedeb779", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c1474edd9028bfb24d046200e88a4ea8c8c4a9ca7c348578680d143bcedeb779", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1474edd9028bfb24d046200e88a4ea8c8c4a9ca7c348578680d143bcedeb779", kill_on_drop: false }`
[INFO] [stdout] c1474edd9028bfb24d046200e88a4ea8c8c4a9ca7c348578680d143bcedeb779
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f132b018cf4cf9b84cf47da19ca9b46d1a64f32bda59ba6f5eea61312b9443c
[INFO] running `Command { std: "docker" "start" "-a" "6f132b018cf4cf9b84cf47da19ca9b46d1a64f32bda59ba6f5eea61312b9443c", kill_on_drop: false }`
[INFO] [stderr]    Compiling test_pairs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "6f132b018cf4cf9b84cf47da19ca9b46d1a64f32bda59ba6f5eea61312b9443c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f132b018cf4cf9b84cf47da19ca9b46d1a64f32bda59ba6f5eea61312b9443c", kill_on_drop: false }`
[INFO] [stdout] 6f132b018cf4cf9b84cf47da19ca9b46d1a64f32bda59ba6f5eea61312b9443c
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 519d1984053fd3d6336312733251a9b45a30aa7a742ff3ea9b6923f5c5af751d
[INFO] running `Command { std: "docker" "start" "-a" "519d1984053fd3d6336312733251a9b45a30aa7a742ff3ea9b6923f5c5af751d", kill_on_drop: false }`
[INFO] [stderr]    Compiling test_pairs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/lib.rs:23:46
[INFO] [stdout]    |
[INFO] [stdout] 23 |         test_pairs(&pairs, |a, b| a + 1, |b, a| b - 1);
[INFO] [stdout]    |                                              ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> src/lib.rs:23:32
[INFO] [stdout]    |
[INFO] [stdout] 23 |         test_pairs(&pairs, |a, b| a + 1, |b, a| b - 1);
[INFO] [stdout]    |                                ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "519d1984053fd3d6336312733251a9b45a30aa7a742ff3ea9b6923f5c5af751d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "519d1984053fd3d6336312733251a9b45a30aa7a742ff3ea9b6923f5c5af751d", kill_on_drop: false }`
[INFO] [stdout] 519d1984053fd3d6336312733251a9b45a30aa7a742ff3ea9b6923f5c5af751d
