[INFO] cloning repository https://github.com/LiWenGu/learing-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LiWenGu/learing-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiWenGu%2Flearing-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiWenGu%2Flearing-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1018016a1d796e913f4132017e0b754036fa4939
[INFO] checking LiWenGu/learing-rust against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLiWenGu%2Flearing-rust" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LiWenGu/learing-rust 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/LiWenGu/learing-rust
[INFO] finished tweaking git repo https://github.com/LiWenGu/learing-rust
[INFO] tweaked toml for git repo https://github.com/LiWenGu/learing-rust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/LiWenGu/learing-rust 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 5ce96313c31cad9a9725af78d44cc1aa90a78b461c2d41197b7b45f70c65ec85
[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" "5ce96313c31cad9a9725af78d44cc1aa90a78b461c2d41197b7b45f70c65ec85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5ce96313c31cad9a9725af78d44cc1aa90a78b461c2d41197b7b45f70c65ec85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ce96313c31cad9a9725af78d44cc1aa90a78b461c2d41197b7b45f70c65ec85", kill_on_drop: false }`
[INFO] [stdout] 5ce96313c31cad9a9725af78d44cc1aa90a78b461c2d41197b7b45f70c65ec85
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] a264994e37ac760c2db0e4b1e76ab726fcef8ab297afaa54c04e66335f3af9c2
[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" "a264994e37ac760c2db0e4b1e76ab726fcef8ab297afaa54c04e66335f3af9c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking intelligent-point v0.1.0 (/opt/rustwide/workdir/intelligent-point)
[INFO] [stderr]     Checking object-feature v0.1.0 (/opt/rustwide/workdir/object-feature)
[INFO] [stderr]     Checking web v0.1.0 (/opt/rustwide/workdir/web)
[INFO] [stderr]     Checking hello_macro v0.1.0 (/opt/rustwide/workdir/hello_macro)
[INFO] [stderr]     Checking fearless-concurrent v0.1.0 (/opt/rustwide/workdir/fearless-concurrent)
[INFO] [stderr]     Checking advance-feature v0.1.0 (/opt/rustwide/workdir/advance-feature)
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> intelligent-point/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]    --> object-feature/src/lib.rs:180:27
[INFO] [stdout]     |
[INFO] [stdout] 180 |     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 import: `std::rc::Rc`
[INFO] [stdout]  --> intelligent-point/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]   --> object-feature/src/lib.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     width: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]   --> object-feature/src/lib.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     height: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `options`
[INFO] [stdout]   --> object-feature/src/lib.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     options: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> web/src/lib.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox + Send + 'static`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]    --> object-feature/src/lib.rs:180:27
[INFO] [stdout]     |
[INFO] [stdout] 180 |     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: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> web/src/lib.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 | type Job = Box<FnBox + Send + 'static>;
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnBox + Send + 'static`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]   --> object-feature/src/lib.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     width: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]   --> object-feature/src/lib.rs:61:5
[INFO] [stdout]    |
[INFO] [stdout] 61 |     height: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `options`
[INFO] [stdout]   --> object-feature/src/lib.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 |     options: Vec<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `split_at_mut`
[INFO] [stdout]   --> advance-feature/src/main.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `diameter`
[INFO] [stdout]   --> advance-feature/src/main.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `baby_name`
[INFO] [stdout]   --> advance-feature/src/main.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn baby_name() -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `MutexExample` should have a snake case name
[INFO] [stdout]   --> fearless-concurrent/src/main.rs:85:4
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn MutexExample() {
[INFO] [stdout]    |    ^^^^^^^^^^^^ help: convert the identifier to snake case: `mutex_example`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `split_at_mut`
[INFO] [stdout]   --> advance-feature/src/main.rs:18:4
[INFO] [stdout]    |
[INFO] [stdout] 18 | fn split_at_mut(slice: &mut [i32], mid: usize) -> (&mut [i32], &mut [i32]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `diameter`
[INFO] [stdout]   --> advance-feature/src/main.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `baby_name`
[INFO] [stdout]   --> advance-feature/src/main.rs:46:8
[INFO] [stdout]    |
[INFO] [stdout] 46 |     fn baby_name() -> String {
[INFO] [stdout]    |        ^^^^^^^^^
[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: function `MutexExample` should have a snake case name
[INFO] [stdout]   --> fearless-concurrent/src/main.rs:85:4
[INFO] [stdout]    |
[INFO] [stdout] 85 | fn MutexExample() {
[INFO] [stdout]    |    ^^^^^^^^^^^^ help: convert the identifier to snake case: `mutex_example`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]  --> intelligent-point/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let list = Cons(1,
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> intelligent-point/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let c = CustomSmartPointer {data: String::from("my stuff")};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> intelligent-point/src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let d = CustomSmartPointer {data: String::from("other stuff")};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Listz`
[INFO] [stdout]   --> intelligent-point/src/main.rs:67:6
[INFO] [stdout]    |
[INFO] [stdout] 67 | enum Listz {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread`
[INFO] [stdout]  --> web/src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{fs, thread};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `thread`
[INFO] [stdout]  --> web/src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{fs, thread};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]  --> intelligent-point/src/main.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let list = Cons(1,
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> intelligent-point/src/main.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let c = CustomSmartPointer {data: String::from("my stuff")};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> intelligent-point/src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let d = CustomSmartPointer {data: String::from("other stuff")};
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Listz`
[INFO] [stdout]   --> intelligent-point/src/main.rs:67:6
[INFO] [stdout]    |
[INFO] [stdout] 67 | enum Listz {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking add-one v0.1.0 (/opt/rustwide/workdir/add-one)
[INFO] [stderr]     Checking quote v0.6.13
[INFO] [stderr]     Checking adder v0.1.0 (/opt/rustwide/workdir/adder)
[INFO] [stdout] warning: unused import: `rand`
[INFO] [stdout]  --> adder/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `rand`
[INFO] [stdout]  --> adder/src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use rand;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` 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] [stderr]     Checking syn v0.14.9
[INFO] [stderr]     Checking hello_macro_derive v0.1.0 (/opt/rustwide/workdir/hello_macro/hello_macro_derive)
[INFO] [stderr]     Checking pancakes v0.1.0 (/opt/rustwide/workdir/pancakes)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.60s
[INFO] running `Command { std: "docker" "inspect" "a264994e37ac760c2db0e4b1e76ab726fcef8ab297afaa54c04e66335f3af9c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a264994e37ac760c2db0e4b1e76ab726fcef8ab297afaa54c04e66335f3af9c2", kill_on_drop: false }`
[INFO] [stdout] a264994e37ac760c2db0e4b1e76ab726fcef8ab297afaa54c04e66335f3af9c2