[INFO] fetching crate opt_struct 0.1.4...
[INFO] testing opt_struct-0.1.4 against 1.86.0 for beta-1.87-1
[INFO] extracting crate opt_struct 0.1.4 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate opt_struct 0.1.4 on toolchain 1.86.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.86.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate opt_struct 0.1.4
[INFO] finished tweaking crates.io crate opt_struct 0.1.4
[INFO] tweaked toml for crates.io crate opt_struct 0.1.4 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate opt_struct 0.1.4 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" "+1.86.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1.86.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e84f368c5135bdc3a942382602ca811483a80ece980a9c9839fe8b6f16962567
[INFO] running `Command { std: "docker" "start" "-a" "e84f368c5135bdc3a942382602ca811483a80ece980a9c9839fe8b6f16962567", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e84f368c5135bdc3a942382602ca811483a80ece980a9c9839fe8b6f16962567", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e84f368c5135bdc3a942382602ca811483a80ece980a9c9839fe8b6f16962567", kill_on_drop: false }`
[INFO] [stdout] e84f368c5135bdc3a942382602ca811483a80ece980a9c9839fe8b6f16962567
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1.86.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bfc781ea5b9bb9b1ba6eede5ae14d4a5a08edbd98c673ef1c24cf44eb77f2f3d
[INFO] running `Command { std: "docker" "start" "-a" "bfc781ea5b9bb9b1ba6eede5ae14d4a5a08edbd98c673ef1c24cf44eb77f2f3d", kill_on_drop: false }`
[INFO] [stderr]    Compiling opt_struct v0.1.4 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/hash_map.rs:215:32
[INFO] [stdout]     |
[INFO] [stdout] 215 | pub struct TupleMapper<'t,T,V>(&'t (T,V));
[INFO] [stdout]     |            -----------         ^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "bfc781ea5b9bb9b1ba6eede5ae14d4a5a08edbd98c673ef1c24cf44eb77f2f3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfc781ea5b9bb9b1ba6eede5ae14d4a5a08edbd98c673ef1c24cf44eb77f2f3d", kill_on_drop: false }`
[INFO] [stdout] bfc781ea5b9bb9b1ba6eede5ae14d4a5a08edbd98c673ef1c24cf44eb77f2f3d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+1.86.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 32f7355d85330c1dbe93bcf2cea967760d6ba19144eda44c1fae90d73c07d178
[INFO] running `Command { std: "docker" "start" "-a" "32f7355d85330c1dbe93bcf2cea967760d6ba19144eda44c1fae90d73c07d178", kill_on_drop: false }`
[INFO] [stderr] Error response from daemon: mkdir /var/lib/docker/overlay2/6465abd7982d477308a23bf16fd55e6e9cc21caf203e746743dca9b89a045d2a/merged: no space left on device
[INFO] running `Command { std: "docker" "inspect" "32f7355d85330c1dbe93bcf2cea967760d6ba19144eda44c1fae90d73c07d178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32f7355d85330c1dbe93bcf2cea967760d6ba19144eda44c1fae90d73c07d178", kill_on_drop: false }`
[INFO] [stdout] 32f7355d85330c1dbe93bcf2cea967760d6ba19144eda44c1fae90d73c07d178