[INFO] fetching crate avl_tree 0.2.0...
[INFO] testing avl_tree-0.2.0 against beta-2022-04-10 for beta-1.61-1
[INFO] extracting crate avl_tree 0.2.0 into /workspace/builds/worker-42/source
[INFO] validating manifest of crates.io crate avl_tree 0.2.0 on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate avl_tree 0.2.0
[INFO] finished tweaking crates.io crate avl_tree 0.2.0
[INFO] tweaked toml for crates.io crate avl_tree 0.2.0 written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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" "+beta-2022-04-10" "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-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 894772d374a9827221f453804ef292a0d8596b6e4394bdd933c3c23dc2023ae5
[INFO] running `Command { std: "docker" "start" "-a" "894772d374a9827221f453804ef292a0d8596b6e4394bdd933c3c23dc2023ae5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "894772d374a9827221f453804ef292a0d8596b6e4394bdd933c3c23dc2023ae5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "894772d374a9827221f453804ef292a0d8596b6e4394bdd933c3c23dc2023ae5", kill_on_drop: false }`
[INFO] [stdout] 894772d374a9827221f453804ef292a0d8596b6e4394bdd933c3c23dc2023ae5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4a1ac1078c7c5ce2cd25064b87658be0f36cca56d4d0520367ff3f82c43ca78
[INFO] running `Command { std: "docker" "start" "-a" "f4a1ac1078c7c5ce2cd25064b87658be0f36cca56d4d0520367ff3f82c43ca78", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling num_threads v0.1.5
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]    Compiling time v0.3.9
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling avl_tree v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]    --> src/node.rs:252:20
[INFO] [stdout]     |
[INFO] [stdout] 252 |         t = insert((x as u64),1337+x-1,t)
[INFO] [stdout]     |                    ^        ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 252 -         t = insert((x as u64),1337+x-1,t)
[INFO] [stdout] 252 +         t = insert(x as u64,1337+x-1,t)
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `max`, `min`, `to_string`
[INFO] [stdout]  --> src/tree.rs:5:33
[INFO] [stdout]   |
[INFO] [stdout] 5 | use node::{insert,delete,search,min,max,is_avl_tree, to_string, min_pair, max_pair};
[INFO] [stdout]   |                                 ^^^ ^^^              ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(test)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(collections_bound)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(rand)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `collections_bound` has been stable since 1.17.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(collections_bound)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `rand`
[INFO] [stdout]  --> src/lib.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(rand)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `avl_tree` due to 5 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "f4a1ac1078c7c5ce2cd25064b87658be0f36cca56d4d0520367ff3f82c43ca78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4a1ac1078c7c5ce2cd25064b87658be0f36cca56d4d0520367ff3f82c43ca78", kill_on_drop: false }`
[INFO] [stdout] f4a1ac1078c7c5ce2cd25064b87658be0f36cca56d4d0520367ff3f82c43ca78