[INFO] fetching crate common-tree 0.1.1...
[INFO] testing common-tree-0.1.1 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate common-tree 0.1.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate common-tree 0.1.1 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate common-tree 0.1.1
[INFO] finished tweaking crates.io crate common-tree 0.1.1
[INFO] tweaked toml for crates.io crate common-tree 0.1.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate common-tree 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 401ecdda85b67656f35ba3bb49450c2a9303113deeefa12fb3cc7f5041b59bdd
[INFO] running `Command { std: "docker" "start" "-a" "401ecdda85b67656f35ba3bb49450c2a9303113deeefa12fb3cc7f5041b59bdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "401ecdda85b67656f35ba3bb49450c2a9303113deeefa12fb3cc7f5041b59bdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "401ecdda85b67656f35ba3bb49450c2a9303113deeefa12fb3cc7f5041b59bdd", kill_on_drop: false }`
[INFO] [stdout] 401ecdda85b67656f35ba3bb49450c2a9303113deeefa12fb3cc7f5041b59bdd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 95a5e4ae0f9763f9cb0a3fe092681147aa2ee69126bee57b0b6968485d920fbd
[INFO] running `Command { std: "docker" "start" "-a" "95a5e4ae0f9763f9cb0a3fe092681147aa2ee69126bee57b0b6968485d920fbd", kill_on_drop: false }`
[INFO] [stderr]    Compiling common-tree v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `Command { std: "docker" "inspect" "95a5e4ae0f9763f9cb0a3fe092681147aa2ee69126bee57b0b6968485d920fbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95a5e4ae0f9763f9cb0a3fe092681147aa2ee69126bee57b0b6968485d920fbd", kill_on_drop: false }`
[INFO] [stdout] 95a5e4ae0f9763f9cb0a3fe092681147aa2ee69126bee57b0b6968485d920fbd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 605994a1083969dbf16c978c31cc3fd8acd64b35cac860c18dc434a41c3bbf4e
[INFO] running `Command { std: "docker" "start" "-a" "605994a1083969dbf16c978c31cc3fd8acd64b35cac860c18dc434a41c3bbf4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling common-tree v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `level2_2`
[INFO] [stdout]    --> src/node.rs:168:13
[INFO] [stdout]     |
[INFO] [stdout] 168 |         let level2_2 = Node::new(level2_2_data.clone());
[INFO] [stdout]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_level2_2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:138:13
[INFO] [stdout]     |
[INFO] [stdout] 138 |         let mut data = node.data_mut();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:195:13
[INFO] [stdout]     |
[INFO] [stdout] 195 |         let mut root = get_tree();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/node.rs:234:13
[INFO] [stdout]     |
[INFO] [stdout] 234 |         let mut root = get_tree2();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `Command { std: "docker" "inspect" "605994a1083969dbf16c978c31cc3fd8acd64b35cac860c18dc434a41c3bbf4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "605994a1083969dbf16c978c31cc3fd8acd64b35cac860c18dc434a41c3bbf4e", kill_on_drop: false }`
[INFO] [stdout] 605994a1083969dbf16c978c31cc3fd8acd64b35cac860c18dc434a41c3bbf4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0f8a65c4880831d2a145e4e44076b4974e0d361d6a7aa5b7bdfe488258b7335a
[INFO] running `Command { std: "docker" "start" "-a" "0f8a65c4880831d2a145e4e44076b4974e0d361d6a7aa5b7bdfe488258b7335a", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `level2_2`
[INFO] [stderr]    --> src/node.rs:168:13
[INFO] [stderr]     |
[INFO] [stderr] 168 |         let level2_2 = Node::new(level2_2_data.clone());
[INFO] [stderr]     |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_level2_2`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/node.rs:138:13
[INFO] [stderr]     |
[INFO] [stderr] 138 |         let mut data = node.data_mut();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/node.rs:195:13
[INFO] [stderr]     |
[INFO] [stderr] 195 |         let mut root = get_tree();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/node.rs:234:13
[INFO] [stderr]     |
[INFO] [stderr] 234 |         let mut root = get_tree2();
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `common-tree` (lib test) generated 4 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/common_tree-6b1c238aeea049e6)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test node::tests::data_works ... ok
[INFO] [stdout] test node::tests::child_path_works ... ok
[INFO] [stdout] test node::tests::child_works ... ok
[INFO] [stdout] test node::tests::traversal_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests common-tree
[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] running `Command { std: "docker" "inspect" "0f8a65c4880831d2a145e4e44076b4974e0d361d6a7aa5b7bdfe488258b7335a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f8a65c4880831d2a145e4e44076b4974e0d361d6a7aa5b7bdfe488258b7335a", kill_on_drop: false }`
[INFO] [stdout] 0f8a65c4880831d2a145e4e44076b4974e0d361d6a7aa5b7bdfe488258b7335a