[INFO] updating cached repository https://github.com/fhbzyc/rust_practise
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0323d88e7714e28d9c612610e0a8129b08019218
[INFO] testing fhbzyc/rust_practise against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffhbzyc%2Frust_practise" "/workspace/builds/worker-14/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fhbzyc/rust_practise on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/fhbzyc/rust_practise
[INFO] finished tweaking git repo https://github.com/fhbzyc/rust_practise
[INFO] tweaked toml for git repo https://github.com/fhbzyc/rust_practise written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/fhbzyc/rust_practise already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0d26376eea7f2290f0b468bd36dd78cdb0433374971b3fae110b9552c42d104d
[INFO] running `"docker" "start" "-a" "0d26376eea7f2290f0b468bd36dd78cdb0433374971b3fae110b9552c42d104d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling server v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/thread_pool/thread_pool.rs:46:16
[INFO] [stderr]    |
[INFO] [stderr] 46 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stderr]    |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox + Send + 'static`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `workers`
[INFO] [stderr]  --> src/thread_pool/thread_pool.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 |     workers: Vec<Worker>,
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `id`
[INFO] [stderr]   --> src/thread_pool/thread_pool.rs:49:5
[INFO] [stderr]    |
[INFO] [stderr] 49 |     id: usize,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `thread`
[INFO] [stderr]   --> src/thread_pool/thread_pool.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     thread: thread::JoinHandle<()>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `RefCell`
[INFO] [stderr]   --> src/tree/blance_tree.rs:46:17
[INFO] [stderr]    |
[INFO] [stderr] 46 |         Rc::new(RefCell::new(node))
[INFO] [stderr]    |                 ^^^^^^^ use of undeclared type or module `RefCell`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Weak`
[INFO] [stderr]    --> src/tree/blance_tree.rs:110:34
[INFO] [stderr]     |
[INFO] [stderr] 110 |                     let parent = Weak::upgrade(&node).unwrap();
[INFO] [stderr]     |                                  ^^^^ use of undeclared type or module `Weak`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `cmp`
[INFO] [stderr]    --> src/tree/blance_tree.rs:137:13
[INFO] [stderr]     |
[INFO] [stderr] 137 |             cmp::max(
[INFO] [stderr]     |             ^^^ use of undeclared type or module `cmp`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `RefCell` in this scope
[INFO] [stderr]   --> src/tree/blance_tree.rs:34:23
[INFO] [stderr]    |
[INFO] [stderr] 34 | type TreeNode<T> = Rc<RefCell<Node<T>>>;
[INFO] [stderr]    |                       ^^^^^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use core::cell::RefCell;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::cell::RefCell;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Weak` in this scope
[INFO] [stderr]   --> src/tree/blance_tree.rs:35:22
[INFO] [stderr]    |
[INFO] [stderr] 35 | type ParentNode<T> = Weak<RefCell<Node<T>>>;
[INFO] [stderr]    |                      ^^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::rc::Weak;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::sync::Weak;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `RefCell` in this scope
[INFO] [stderr]   --> src/tree/blance_tree.rs:35:27
[INFO] [stderr]    |
[INFO] [stderr] 35 | type ParentNode<T> = Weak<RefCell<Node<T>>>;
[INFO] [stderr]    |                           ^^^^^^^ not found in this scope
[INFO] [stderr]    |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]    |
[INFO] [stderr] 1  | use core::cell::RefCell;
[INFO] [stderr]    |
[INFO] [stderr] 1  | use std::cell::RefCell;
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `RefCell` in this scope
[INFO] [stderr]    --> src/tree/blance_tree.rs:157:21
[INFO] [stderr]     |
[INFO] [stderr] 157 |     root: Option<Rc<RefCell<Node<T>>>>,
[INFO] [stderr]     |                     ^^^^^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use core::cell::RefCell;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use std::cell::RefCell;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `RefCell` in this scope
[INFO] [stderr]    --> src/tree/blance_tree.rs:172:29
[INFO] [stderr]     |
[INFO] [stderr] 172 |     fn select_node(node: Rc<RefCell<Node<T>>>, key: i64) -> Option<TreeNode<T>> {
[INFO] [stderr]     |                             ^^^^^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 1   | use core::cell::RefCell;
[INFO] [stderr]     |
[INFO] [stderr] 1   | use std::cell::RefCell;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `new` in module `blance_tree`
[INFO] [stderr]  --> src/main.rs:7:33
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut tree = blance_tree::new(0);
[INFO] [stderr]   |                                 ^^^ not found in `blance_tree`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::Cell`
[INFO] [stderr]  --> src/tree/blance_tree.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cell::Cell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `resp` is never read
[INFO] [stderr]   --> src/bin/main.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut resp = "";
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `T` is never used
[INFO] [stderr]    --> src/tree/blance_tree.rs:156:19
[INFO] [stderr]     |
[INFO] [stderr] 156 | struct BlanceTree<T> {
[INFO] [stderr]     |                   ^ unused parameter
[INFO] [stderr]     |
[INFO] [stderr]     = help: consider removing `T`, referring to it in a field, or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 10 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0392, E0412, E0425, E0433.
[INFO] [stderr] For more information about an error, try `rustc --explain E0392`.
[INFO] [stderr] error: could not compile `server`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0d26376eea7f2290f0b468bd36dd78cdb0433374971b3fae110b9552c42d104d"`
[INFO] running `"docker" "rm" "-f" "0d26376eea7f2290f0b468bd36dd78cdb0433374971b3fae110b9552c42d104d"`
[INFO] [stdout] 0d26376eea7f2290f0b468bd36dd78cdb0433374971b3fae110b9552c42d104d