[INFO] fetching crate bridgetree 0.5.0...
[INFO] checking bridgetree-0.5.0 against master#5ad98b4026d5172f27615b105658bc8bfd677be8 for pr-129422
[INFO] extracting crate bridgetree 0.5.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate bridgetree 0.5.0 on toolchain 5ad98b4026d5172f27615b105658bc8bfd677be8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bridgetree 0.5.0
[INFO] finished tweaking crates.io crate bridgetree 0.5.0
[INFO] tweaked toml for crates.io crate bridgetree 0.5.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 50 packages to latest compatible versions
[INFO] [stderr]       Adding bit-set v0.5.3 (latest: v0.8.0)
[INFO] [stderr]       Adding bit-vec v0.6.3 (latest: v0.8.0)
[INFO] [stderr]       Adding linux-raw-sys v0.4.14 (latest: v0.6.5)
[INFO] [stderr]       Adding quick-error v1.2.3 (latest: v2.0.1)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.2+wasi-0.2.1)
[INFO] [stderr]       Adding windows-sys v0.52.0 (latest: v0.59.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded incrementalmerkletree v0.6.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bb4541e802eabd18cdec1c7bf7dffa1276b4f79728d431a546dff87355fef0fe
[INFO] running `Command { std: "docker" "start" "-a" "bb4541e802eabd18cdec1c7bf7dffa1276b4f79728d431a546dff87355fef0fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bb4541e802eabd18cdec1c7bf7dffa1276b4f79728d431a546dff87355fef0fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb4541e802eabd18cdec1c7bf7dffa1276b4f79728d431a546dff87355fef0fe", kill_on_drop: false }`
[INFO] [stdout] bb4541e802eabd18cdec1c7bf7dffa1276b4f79728d431a546dff87355fef0fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+5ad98b4026d5172f27615b105658bc8bfd677be8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a270c8adc22190bd772a8c23c82116d1738eccb7d41d6cfa5fa699f8ad6a65c
[INFO] running `Command { std: "docker" "start" "-a" "7a270c8adc22190bd772a8c23c82116d1738eccb7d41d6cfa5fa699f8ad6a65c", kill_on_drop: false }`
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking proptest v1.5.0
[INFO] [stderr]     Checking incrementalmerkletree v0.6.0
[INFO] [stderr]     Checking bridgetree v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lib.rs:828:24
[INFO] [stdout]     |
[INFO] [stdout] 828 |             Checkpoint(usize, &'a Checkpoint<C>),
[INFO] [stdout]     |             ---------- ^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `AuthBase` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 828 |             Checkpoint((), &'a Checkpoint<C>),
[INFO] [stdout]     |                        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lib.rs:828:24
[INFO] [stdout]     |
[INFO] [stdout] 828 |             Checkpoint(usize, &'a Checkpoint<C>),
[INFO] [stdout]     |             ---------- ^^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `AuthBase` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 828 |             Checkpoint((), &'a Checkpoint<C>),
[INFO] [stdout]     |                        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.17s
[INFO] running `Command { std: "docker" "inspect" "7a270c8adc22190bd772a8c23c82116d1738eccb7d41d6cfa5fa699f8ad6a65c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a270c8adc22190bd772a8c23c82116d1738eccb7d41d6cfa5fa699f8ad6a65c", kill_on_drop: false }`
[INFO] [stdout] 7a270c8adc22190bd772a8c23c82116d1738eccb7d41d6cfa5fa699f8ad6a65c