[INFO] fetching crate hashtree 0.2.1...
[INFO] testing hashtree-0.2.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate hashtree 0.2.1 into /workspace/builds/worker-54/source
[INFO] validating manifest of crates.io crate hashtree 0.2.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-54/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 242ac923fb419896df3bc907c64722341ac73804fbb1c3370a73a335c5a6941d
[INFO] running `Command { std: "docker" "start" "-a" "242ac923fb419896df3bc907c64722341ac73804fbb1c3370a73a335c5a6941d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "242ac923fb419896df3bc907c64722341ac73804fbb1c3370a73a335c5a6941d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "242ac923fb419896df3bc907c64722341ac73804fbb1c3370a73a335c5a6941d", kill_on_drop: false }`
[INFO] [stdout] 242ac923fb419896df3bc907c64722341ac73804fbb1c3370a73a335c5a6941d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51a793f864e1f946b4f39d44a495f7c024a092c62452c254e0d5247d280ffa85
[INFO] running `Command { std: "docker" "start" "-a" "51a793f864e1f946b4f39d44a495f7c024a092c62452c254e0d5247d280ffa85", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "51a793f864e1f946b4f39d44a495f7c024a092c62452c254e0d5247d280ffa85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51a793f864e1f946b4f39d44a495f7c024a092c62452c254e0d5247d280ffa85", kill_on_drop: false }`
[INFO] [stdout] 51a793f864e1f946b4f39d44a495f7c024a092c62452c254e0d5247d280ffa85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5193bc4666023e38412d4fe9103e6d72328bfdff6ce0d8c85dd5403b776c90d5
[INFO] running `Command { std: "docker" "start" "-a" "5193bc4666023e38412d4fe9103e6d72328bfdff6ce0d8c85dd5403b776c90d5", kill_on_drop: false }`
[INFO] [stderr]    Compiling md5 v0.7.0
[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]    Compiling 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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `Command { std: "docker" "inspect" "5193bc4666023e38412d4fe9103e6d72328bfdff6ce0d8c85dd5403b776c90d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5193bc4666023e38412d4fe9103e6d72328bfdff6ce0d8c85dd5403b776c90d5", kill_on_drop: false }`
[INFO] [stdout] 5193bc4666023e38412d4fe9103e6d72328bfdff6ce0d8c85dd5403b776c90d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-54/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 492fed789300b7f517f9d82fae5074a6981f07ec22f20fef319259ffd08b9146
[INFO] running `Command { std: "docker" "start" "-a" "492fed789300b7f517f9d82fae5074a6981f07ec22f20fef319259ffd08b9146", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]    --> src/lib.rs:234:33
[INFO] [stderr]     |
[INFO] [stderr] 234 |     pub fn insert<R>(&mut self, data: &mut R) 
[INFO] [stderr]     |                                 ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hash`
[INFO] [stderr]    --> src/lib.rs:282:24
[INFO] [stderr]     |
[INFO] [stderr] 282 |     pub fn find(&self, hash: T) -> Option<&HashTreeNode<T>> {
[INFO] [stderr]     |                        ^^^^ help: if this is intentional, prefix it with an underscore: `_hash`
[INFO] [stderr] 
[INFO] [stderr] warning: `hashtree` (lib) generated 2 warnings
[INFO] [stderr] warning: `hashtree` (lib test) generated 2 warnings (2 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hashtree-86f294cace65abee)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hashtree
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - HashTree<T, F>::new (line 126) ... ok
[INFO] [stdout] test src/lib.rs - HashTree<T, F>::is_empty (line 251) ... ok
[INFO] [stdout] test src/lib.rs - HashTree<T, F>::create (line 156) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.52s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "492fed789300b7f517f9d82fae5074a6981f07ec22f20fef319259ffd08b9146", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "492fed789300b7f517f9d82fae5074a6981f07ec22f20fef319259ffd08b9146", kill_on_drop: false }`
[INFO] [stdout] 492fed789300b7f517f9d82fae5074a6981f07ec22f20fef319259ffd08b9146