[INFO] cloning repository https://github.com/EdenCao/rust_learning
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdenCao%2Frust_learning'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3b85aa524f292dd7b9939ed7d5de8b6456618f9f
[INFO] checking EdenCao/rust_learning against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEdenCao%2Frust_learning" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EdenCao/rust_learning on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-7/source/Cargo.toml
[INFO] crate git repo https://github.com/EdenCao/rust_learning already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a9941e2466aa4daec358ffff952fc8ae43b23c04e6971974a5ce21dddc18efd2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a9941e2466aa4daec358ffff952fc8ae43b23c04e6971974a5ce21dddc18efd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a9941e2466aa4daec358ffff952fc8ae43b23c04e6971974a5ce21dddc18efd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9941e2466aa4daec358ffff952fc8ae43b23c04e6971974a5ce21dddc18efd2", kill_on_drop: false }`
[INFO] [stdout] a9941e2466aa4daec358ffff952fc8ae43b23c04e6971974a5ce21dddc18efd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=forbid" "-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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fca46cb8c14d7b91a56ffa2593e6b559777070d3928295c30c3949238a424b29
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "fca46cb8c14d7b91a56ffa2593e6b559777070d3928295c30c3949238a424b29", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking rust_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/read.rs:14:42
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn run(config: Config) -> Result<(), Box<Error>> {
[INFO] [stdout]    |                                          ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `query`
[INFO] [stdout]   --> src/read.rs:27:5
[INFO] [stdout]    |
[INFO] [stdout] 27 |     query: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `search_case_insensitive`
[INFO] [stdout]   --> src/read.rs:82:4
[INFO] [stdout]    |
[INFO] [stdout] 82 | fn search_case_insensitive<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `refcall`
[INFO] [stdout]   --> src/refcall.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout] 1  | / pub trait Messenger {
[INFO] [stdout] 2  | |     fn send(&self, msg: &str);
[INFO] [stdout] 3  | | }
[INFO] [stdout] 4  | |
[INFO] [stdout] ...  |
[INFO] [stdout] 65 | |
[INFO] [stdout] 66 | | }
[INFO] [stdout]    | |_^ consider adding a `main` function to `src/refcall.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[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] [stdout] warning: unused variable: `s6`
[INFO] [stdout]   --> src/owner.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 |   let s6 = s5;
[INFO] [stdout]    |       ^^ help: if this is intentional, prefix it with an underscore: `_s6`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]   --> src/owner.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn gives_ownership() -> String {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/struct_ex.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 17 |   ///
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 18 |   let rect1 = (30, 50);
[INFO] [stdout]    |   --------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/struct_ex.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 17 |   ///
[INFO] [stdout]    |   ^^^
[INFO] [stdout] 18 |   let rect1 = (30, 50);
[INFO] [stdout]    |   --------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/blog.rs:2:21
[INFO] [stdout]   |
[INFO] [stdout] 2 |   state: Option<Box<State>>,
[INFO] [stdout]   |                     ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/blog.rs:33:45
[INFO] [stdout]    |
[INFO] [stdout] 33 |   fn request_review(self: Box<Self>) -> Box<State>;
[INFO] [stdout]    |                                             ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/blog.rs:34:38
[INFO] [stdout]    |
[INFO] [stdout] 34 |   fn approve(self: Box<Self>) -> Box<State>;
[INFO] [stdout]    |                                      ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/blog.rs:40:45
[INFO] [stdout]    |
[INFO] [stdout] 40 |   fn request_review(self: Box<Self>) -> Box<State> {
[INFO] [stdout]    |                                             ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/blog.rs:44:38
[INFO] [stdout]    |
[INFO] [stdout] 44 |   fn approve(self: Box<Self>) -> Box<State> {
[INFO] [stdout]    |                                      ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/blog.rs:52:45
[INFO] [stdout]    |
[INFO] [stdout] 52 |   fn request_review(self: Box<Self>) -> Box<State> {
[INFO] [stdout]    |                                             ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/blog.rs:56:38
[INFO] [stdout]    |
[INFO] [stdout] 56 |   fn approve(self: Box<Self>) -> Box<State> {
[INFO] [stdout]    |                                      ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/blog.rs:64:45
[INFO] [stdout]    |
[INFO] [stdout] 64 |   fn request_review(self: Box<Self>) -> Box<State> {
[INFO] [stdout]    |                                             ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/blog.rs:68:38
[INFO] [stdout]    |
[INFO] [stdout] 68 |   fn approve(self: Box<Self>) -> Box<State> {
[INFO] [stdout]    |                                      ^^^^^ help: use `dyn`: `dyn State`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> src/blog.rs:30:25
[INFO] [stdout]    |
[INFO] [stdout] 30 |   fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                         ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `six`
[INFO] [stdout]   --> src/match.rs:25:7
[INFO] [stdout]    |
[INFO] [stdout] 25 |   let six = plus_one(five);
[INFO] [stdout]    |       ^^^ help: if this is intentional, prefix it with an underscore: `_six`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `none`
[INFO] [stdout]   --> src/match.rs:26:7
[INFO] [stdout]    |
[INFO] [stdout] 26 |   let none = plus_one(None);
[INFO] [stdout]    |       ^^^^ help: if this is intentional, prefix it with an underscore: `_none`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Penny`
[INFO] [stdout]  --> src/match.rs:2:3
[INFO] [stdout]   |
[INFO] [stdout] 2 |   Penny,
[INFO] [stdout]   |   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]  --> src/match.rs:3:3
[INFO] [stdout]   |
[INFO] [stdout] 3 |   Nickel,
[INFO] [stdout]   |   ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]  --> src/match.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 4 |   Dime,
[INFO] [stdout]   |   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alabama`
[INFO] [stdout]   --> src/match.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout] 10 |   Alabama,
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "fca46cb8c14d7b91a56ffa2593e6b559777070d3928295c30c3949238a424b29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fca46cb8c14d7b91a56ffa2593e6b559777070d3928295c30c3949238a424b29", kill_on_drop: false }`
[INFO] [stdout] fca46cb8c14d7b91a56ffa2593e6b559777070d3928295c30c3949238a424b29