[INFO] fetching crate hashtree 0.2.1...
[INFO] checking hashtree-0.2.1 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate hashtree 0.2.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate hashtree 0.2.1 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hashtree 0.2.1
[INFO] finished tweaking crates.io crate hashtree 0.2.1
[INFO] tweaked toml for crates.io crate hashtree 0.2.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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] 26751b33602ac22df80bbe4eddc19dba401931e16fc1af8226802c249316d90b
[INFO] running `Command { std: "docker" "start" "-a" "26751b33602ac22df80bbe4eddc19dba401931e16fc1af8226802c249316d90b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26751b33602ac22df80bbe4eddc19dba401931e16fc1af8226802c249316d90b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26751b33602ac22df80bbe4eddc19dba401931e16fc1af8226802c249316d90b", kill_on_drop: false }`
[INFO] [stdout] 26751b33602ac22df80bbe4eddc19dba401931e16fc1af8226802c249316d90b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7ca25d9ea0fb7b794636183b0e0a667a4ccfaf7933dc16567446f189dc0978f
[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" "e7ca25d9ea0fb7b794636183b0e0a667a4ccfaf7933dc16567446f189dc0978f", kill_on_drop: false }`
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]     Checking hashtree v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/lib.rs:234:33
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn insert<R>(&mut self, data: &mut R) 
[INFO] [stdout]     |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hash`
[INFO] [stdout]    --> src/lib.rs:282:24
[INFO] [stdout]     |
[INFO] [stdout] 282 |     pub fn find(&self, hash: T) -> Option<&HashTreeNode<T>> {
[INFO] [stdout]     |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_hash`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]    --> src/lib.rs:234:33
[INFO] [stdout]     |
[INFO] [stdout] 234 |     pub fn insert<R>(&mut self, data: &mut R) 
[INFO] [stdout]     |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hash`
[INFO] [stdout]    --> src/lib.rs:282:24
[INFO] [stdout]     |
[INFO] [stdout] 282 |     pub fn find(&self, hash: T) -> Option<&HashTreeNode<T>> {
[INFO] [stdout]     |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_hash`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.97s
[INFO] running `Command { std: "docker" "inspect" "e7ca25d9ea0fb7b794636183b0e0a667a4ccfaf7933dc16567446f189dc0978f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7ca25d9ea0fb7b794636183b0e0a667a4ccfaf7933dc16567446f189dc0978f", kill_on_drop: false }`
[INFO] [stdout] e7ca25d9ea0fb7b794636183b0e0a667a4ccfaf7933dc16567446f189dc0978f