[INFO] fetching crate merkle-log 0.0.6...
[INFO] checking merkle-log-0.0.6 against try#3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f for pr-87248
[INFO] extracting crate merkle-log 0.0.6 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate merkle-log 0.0.6 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 crates.io crate merkle-log 0.0.6
[INFO] finished tweaking crates.io crate merkle-log 0.0.6
[INFO] tweaked toml for crates.io crate merkle-log 0.0.6 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e59a8c2f14152ccc92a6c079f592dc2dc6fa93f" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] e02ca885a58c10038389fc78ed2d5d99a6fc28ea34fa60abef42f7babfdb22e4
[INFO] running `Command { std: "docker" "start" "-a" "e02ca885a58c10038389fc78ed2d5d99a6fc28ea34fa60abef42f7babfdb22e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e02ca885a58c10038389fc78ed2d5d99a6fc28ea34fa60abef42f7babfdb22e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e02ca885a58c10038389fc78ed2d5d99a6fc28ea34fa60abef42f7babfdb22e4", kill_on_drop: false }`
[INFO] [stdout] e02ca885a58c10038389fc78ed2d5d99a6fc28ea34fa60abef42f7babfdb22e4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] ee287576bc5de376b6ca6b34649f4ded1e57194808e58ca0c03e394dfa0a5739
[INFO] running `Command { std: "docker" "start" "-a" "ee287576bc5de376b6ca6b34649f4ded1e57194808e58ca0c03e394dfa0a5739", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking sha2 v0.9.5
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking serde v1.0.126
[INFO] [stderr]     Checking merkle-log v0.0.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `root_id`
[INFO] [stdout]    --> src/util.rs:502:25
[INFO] [stdout]     |
[INFO] [stdout] 502 |     pub(crate) const fn root_id(size: u64) -> Self {
[INFO] [stdout]     |                         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `root_id`
[INFO] [stdout]    --> src/util.rs:502:25
[INFO] [stdout]     |
[INFO] [stdout] 502 |     pub(crate) const fn root_id(size: u64) -> Self {
[INFO] [stdout]     |                         ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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 21.97s
[INFO] running `Command { std: "docker" "inspect" "ee287576bc5de376b6ca6b34649f4ded1e57194808e58ca0c03e394dfa0a5739", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee287576bc5de376b6ca6b34649f4ded1e57194808e58ca0c03e394dfa0a5739", kill_on_drop: false }`
[INFO] [stdout] ee287576bc5de376b6ca6b34649f4ded1e57194808e58ca0c03e394dfa0a5739