[INFO] cloning repository https://github.com/EdenCao/rust_learning
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EdenCao/rust_learning" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdenCao%2Frust_learning"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdenCao%2Frust_learning'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b85aa524f292dd7b9939ed7d5de8b6456618f9f
[INFO] testing EdenCao/rust_learning against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdenCao%2Frust_learning" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EdenCao/rust_learning 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/EdenCao/rust_learning
[INFO] finished tweaking git repo https://github.com/EdenCao/rust_learning
[INFO] tweaked toml for git repo https://github.com/EdenCao/rust_learning written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/EdenCao/rust_learning 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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 38d819ed79487ef51314521274488cfbb424f99fae72e7548353e74d79ebebcc
[INFO] running `"docker" "start" "-a" "38d819ed79487ef51314521274488cfbb424f99fae72e7548353e74d79ebebcc"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling rust_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/multiple_thread.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/struct_ex.rs:17:3
[INFO] [stderr]    |
[INFO] [stderr] 17 |   ///
[INFO] [stderr]    |   ^^^
[INFO] [stderr] 18 |   let rect1 = (30, 50);
[INFO] [stderr]    |   --------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `refcall`
[INFO] [stderr]   --> src/refcall.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr] 1  | / pub trait Messenger {
[INFO] [stderr] 2  | |     fn send(&self, msg: &str);
[INFO] [stderr] 3  | | }
[INFO] [stderr] 4  | |
[INFO] [stderr] ...  |
[INFO] [stderr] 65 | |
[INFO] [stderr] 66 | | }
[INFO] [stderr]    | |_^ consider adding a `main` function to `src/refcall.rs`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/blog.rs:2:21
[INFO] [stderr]   |
[INFO] [stderr] 2 |   state: Option<Box<State>>,
[INFO] [stderr]   |                     ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/blog.rs:33:45
[INFO] [stderr]    |
[INFO] [stderr] 33 |   fn request_review(self: Box<Self>) -> Box<State>;
[INFO] [stderr]    |                                             ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/blog.rs:34:38
[INFO] [stderr]    |
[INFO] [stderr] 34 |   fn approve(self: Box<Self>) -> Box<State>;
[INFO] [stderr]    |                                      ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/blog.rs:40:45
[INFO] [stderr]    |
[INFO] [stderr] 40 |   fn request_review(self: Box<Self>) -> Box<State> {
[INFO] [stderr]    |                                             ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/blog.rs:44:38
[INFO] [stderr]    |
[INFO] [stderr] 44 |   fn approve(self: Box<Self>) -> Box<State> {
[INFO] [stderr]    |                                      ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/blog.rs:52:45
[INFO] [stderr]    |
[INFO] [stderr] 52 |   fn request_review(self: Box<Self>) -> Box<State> {
[INFO] [stderr]    |                                             ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/blog.rs:56:38
[INFO] [stderr]    |
[INFO] [stderr] 56 |   fn approve(self: Box<Self>) -> Box<State> {
[INFO] [stderr]    |                                      ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/blog.rs:64:45
[INFO] [stderr]    |
[INFO] [stderr] 64 |   fn request_review(self: Box<Self>) -> Box<State> {
[INFO] [stderr]    |                                             ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/blog.rs:68:38
[INFO] [stderr]    |
[INFO] [stderr] 68 |   fn approve(self: Box<Self>) -> Box<State> {
[INFO] [stderr]    |                                      ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] warning: unused variable: `six`
[INFO] [stderr]   --> src/enum.rs:20:7
[INFO] [stderr]    |
[INFO] [stderr] 20 |   let six = IpAddrKind::V6;
[INFO] [stderr]    |       ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `home`
[INFO] [stderr]   --> src/enum.rs:27:7
[INFO] [stderr]    |
[INFO] [stderr] 27 |   let home = IpAddr {
[INFO] [stderr]    |       ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op_type`
[INFO] [stderr]   --> src/enum.rs:35:10
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn route(op_type: IpAddrKind) { }
[INFO] [stderr]    |          ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_op_type`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `kind`
[INFO] [stderr]   --> src/enum.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 |   kind: IpAddrKind,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `address`
[INFO] [stderr]   --> src/enum.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 |   address: String
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `rust_learning`.
[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: unused variable: `post`
[INFO] [stderr]   --> src/blog.rs:30:25
[INFO] [stderr]    |
[INFO] [stderr] 30 |   fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stderr]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "38d819ed79487ef51314521274488cfbb424f99fae72e7548353e74d79ebebcc"`
[INFO] running `"docker" "rm" "-f" "38d819ed79487ef51314521274488cfbb424f99fae72e7548353e74d79ebebcc"`
[INFO] [stdout] 38d819ed79487ef51314521274488cfbb424f99fae72e7548353e74d79ebebcc