[INFO] fetching crate adaptive_backoff 0.2.1...
[INFO] checking adaptive_backoff-0.2.1 against master#e652caa679a304af11fc04f1f12452f255a82593 for pr-98000
[INFO] extracting crate adaptive_backoff 0.2.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate adaptive_backoff 0.2.1 on toolchain e652caa679a304af11fc04f1f12452f255a82593
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e652caa679a304af11fc04f1f12452f255a82593" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate adaptive_backoff 0.2.1
[INFO] finished tweaking crates.io crate adaptive_backoff 0.2.1
[INFO] tweaked toml for crates.io crate adaptive_backoff 0.2.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e652caa679a304af11fc04f1f12452f255a82593" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e652caa679a304af11fc04f1f12452f255a82593" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+e652caa679a304af11fc04f1f12452f255a82593" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 026fdfef25e76d0dff8501e713b204be1be92d8596c3afbccc50e7a679adbb8d
[INFO] running `Command { std: "docker" "start" "-a" "026fdfef25e76d0dff8501e713b204be1be92d8596c3afbccc50e7a679adbb8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "026fdfef25e76d0dff8501e713b204be1be92d8596c3afbccc50e7a679adbb8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "026fdfef25e76d0dff8501e713b204be1be92d8596c3afbccc50e7a679adbb8d", kill_on_drop: false }`
[INFO] [stdout] 026fdfef25e76d0dff8501e713b204be1be92d8596c3afbccc50e7a679adbb8d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:ac0d0aa6ec8ed129e241004a6179c99fa0d2616f50ba759c5b60bd26d0fafa02" "/opt/rustwide/cargo-home/bin/cargo" "+e652caa679a304af11fc04f1f12452f255a82593" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a202afa3c56dc19a9ba8b805621ba7f8a2d93a8d9a646d4a7e77e042a4a86b9c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a202afa3c56dc19a9ba8b805621ba7f8a2d93a8d9a646d4a7e77e042a4a86b9c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.40
[INFO] [stderr]    Compiling unicode-ident v1.0.1
[INFO] [stderr]    Compiling quote v1.0.20
[INFO] [stderr]    Compiling syn v1.0.98
[INFO] [stderr]    Compiling anyhow v1.0.58
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking adaptive_backoff v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `success_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     success_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]    = note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fail_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fail_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `success_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:48:5
[INFO] [stdout]    |
[INFO] [stdout] 48 |     success_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]    = note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fail_step`
[INFO] [stdout]   --> src/lib/adaptive.rs:49:5
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fail_step: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Adaptive` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.73s
[INFO] running `Command { std: "docker" "inspect" "a202afa3c56dc19a9ba8b805621ba7f8a2d93a8d9a646d4a7e77e042a4a86b9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a202afa3c56dc19a9ba8b805621ba7f8a2d93a8d9a646d4a7e77e042a4a86b9c", kill_on_drop: false }`
[INFO] [stdout] a202afa3c56dc19a9ba8b805621ba7f8a2d93a8d9a646d4a7e77e042a4a86b9c