[INFO] cloning repository https://github.com/jfeldman325/Rust-Learning-Examples [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jfeldman325/Rust-Learning-Examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfeldman325%2FRust-Learning-Examples", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfeldman325%2FRust-Learning-Examples'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] b32ce13aa45e32e6b5473a7ae44a9897c30e6af0 [INFO] checking jfeldman325/Rust-Learning-Examples against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfeldman325%2FRust-Learning-Examples" "/workspace/builds/worker-1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jfeldman325/Rust-Learning-Examples on toolchain 7b3565da729099dbe807466fcd118fb2815986e0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/jfeldman325/Rust-Learning-Examples [INFO] finished tweaking git repo https://github.com/jfeldman325/Rust-Learning-Examples [INFO] tweaked toml for git repo https://github.com/jfeldman325/Rust-Learning-Examples written to /workspace/builds/worker-1/source/Cargo.toml [INFO] crate git repo https://github.com/jfeldman325/Rust-Learning-Examples already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] error: the lock file /workspace/builds/worker-1/source/Cargo.lock needs to be updated but --locked was passed to prevent this [INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag. [INFO] the lockfile is outdated, regenerating it [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a12a612a3b8aeecb307e9a15193a0ca9c32aa085fad6f5246d406354e7a71daa [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" "a12a612a3b8aeecb307e9a15193a0ca9c32aa085fad6f5246d406354e7a71daa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a12a612a3b8aeecb307e9a15193a0ca9c32aa085fad6f5246d406354e7a71daa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a12a612a3b8aeecb307e9a15193a0ca9c32aa085fad6f5246d406354e7a71daa", kill_on_drop: false }` [INFO] [stdout] a12a612a3b8aeecb307e9a15193a0ca9c32aa085fad6f5246d406354e7a71daa [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0591389ba8fa5ec7efd3bf1d42ff9dc67143ee0f5fa67dd4ed8338877bbcea55 [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" "0591389ba8fa5ec7efd3bf1d42ff9dc67143ee0f5fa67dd4ed8338877bbcea55", kill_on_drop: false }` [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling syn v1.0.70 [INFO] [stderr] Checking byteorder v1.4.3 [INFO] [stderr] Checking minigrep v0.1.0 (/opt/rustwide/workdir/minigrep) [INFO] [stderr] Checking lifetimes v0.1.0 (/opt/rustwide/workdir/lifetimes) [INFO] [stderr] Checking traits v0.1.0 (/opt/rustwide/workdir/traits) [INFO] [stderr] Checking errors v0.1.0 (/opt/rustwide/workdir/errors) [INFO] [stderr] Checking resaurant v0.1.0 (/opt/rustwide/workdir/restaurant) [INFO] [stderr] Checking smart_pointers v0.1.0 (/opt/rustwide/workdir/smart_pointers) [INFO] [stderr] Checking generics v0.1.0 (/opt/rustwide/workdir/generics) [INFO] [stderr] Checking loops v0.1.0 (/opt/rustwide/workdir/loops) [INFO] [stderr] Checking functions v0.1.0 (/opt/rustwide/workdir/functions) [INFO] [stdout] warning: unused variable: `f` [INFO] [stdout] --> errors/src/main.rs:21:9 [INFO] [stdout] | [INFO] [stdout] 21 | let f = read_file("Hello.txt".to_string()); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_f` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `Rc_List` should have an upper camel case name [INFO] [stdout] --> smart_pointers/src/main.rs:68:6 [INFO] [stdout] | [INFO] [stdout] 68 | enum Rc_List { [INFO] [stdout] | ^^^^^^^ help: convert the identifier to upper camel case: `RcList` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Rc_Cons` should have an upper camel case name [INFO] [stdout] --> smart_pointers/src/main.rs:69:5 [INFO] [stdout] | [INFO] [stdout] 69 | Rc_Cons(RefCell, Rc), [INFO] [stdout] | ^^^^^^^ help: convert the identifier to upper camel case: `RcCons` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Rc_Nil` should have an upper camel case name [INFO] [stdout] --> smart_pointers/src/main.rs:70:5 [INFO] [stdout] | [INFO] [stdout] 70 | Rc_Nil, [INFO] [stdout] | ^^^^^^ help: convert the identifier to upper camel case: `RcNil` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `tweet` [INFO] [stdout] --> traits/src/main.rs:29:9 [INFO] [stdout] | [INFO] [stdout] 29 | let tweet = Tweet { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_tweet` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0515]: cannot return value referencing temporary value [INFO] [stdout] --> traits/src/main.rs:4:9 [INFO] [stdout] | [INFO] [stdout] 4 | &self.summarize()[0..4] [INFO] [stdout] | ^----------------^^^^^^ [INFO] [stdout] | || [INFO] [stdout] | |temporary value created here [INFO] [stdout] | returns a value referencing data owned by the current function [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `Write`, `self` [INFO] [stdout] --> restaurant/src/lib.rs:3:15 [INFO] [stdout] | [INFO] [stdout] 3 | use std::io::{self, Write}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking ownership v0.1.0 (/opt/rustwide/workdir/ownership) [INFO] [stdout] warning: function is never used: `seat_at_table` [INFO] [stdout] --> restaurant/src/front_of_house.rs:3:8 [INFO] [stdout] | [INFO] [stdout] 3 | fn seat_at_table() {} [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `take_order` [INFO] [stdout] --> restaurant/src/front_of_house.rs:6:8 [INFO] [stdout] | [INFO] [stdout] 6 | fn take_order() {} [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `take_payment` [INFO] [stdout] --> restaurant/src/front_of_house.rs:8:8 [INFO] [stdout] | [INFO] [stdout] 8 | fn take_payment() {} [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `fix_incorrect_order` [INFO] [stdout] --> restaurant/src/lib.rs:8:12 [INFO] [stdout] | [INFO] [stdout] 8 | fn fix_incorrect_order() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `cook_order` [INFO] [stdout] --> restaurant/src/lib.rs:12:12 [INFO] [stdout] | [INFO] [stdout] 12 | fn cook_order() { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `ImportantExcerpt` [INFO] [stdout] --> lifetimes/src/main.rs:22:8 [INFO] [stdout] | [INFO] [stdout] 22 | struct ImportantExcerpt<'a> { [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `longest_with_an_announcement` [INFO] [stdout] --> lifetimes/src/main.rs:27:8 [INFO] [stdout] | [INFO] [stdout] 27 | fn longest_with_an_announcement(x: &'a str, y: &'a str, ann: T) -> &'a str [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: type `point` should have an upper camel case name [INFO] [stdout] --> generics/src/main.rs:24:8 [INFO] [stdout] | [INFO] [stdout] 24 | struct point { [INFO] [stdout] | ^^^^^ help: convert the identifier to upper camel case: `Point` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_camel_case_types)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0515`. [INFO] [stdout] [INFO] [stderr] error: could not compile `traits` [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: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `list` [INFO] [stdout] --> smart_pointers/src/main.rs:12:9 [INFO] [stdout] | [INFO] [stdout] 12 | let list = Cons(1, Box::new(Cons(2, Box::new(Cons(3, Box::new(Nil)))))); [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: `x` [INFO] [stdout] --> smart_pointers/src/main.rs:14:9 [INFO] [stdout] | [INFO] [stdout] 14 | let x = 5; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_x` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b` [INFO] [stdout] --> smart_pointers/src/main.rs:26:9 [INFO] [stdout] | [INFO] [stdout] 26 | let b = Cons(3, Box::new(a)); [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_b` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `b_rc` [INFO] [stdout] --> smart_pointers/src/main.rs:34:9 [INFO] [stdout] | [INFO] [stdout] 34 | let b_rc = Rc_Cons(RefCell::new(3), Rc::clone(&a_rc)); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_b_rc` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `c_rc` [INFO] [stdout] --> smart_pointers/src/main.rs:41:13 [INFO] [stdout] | [INFO] [stdout] 41 | let c_rc = Rc_Cons(RefCell::new(4), Rc::clone(&a_rc)); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_c_rc` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `list` [INFO] [stdout] --> smart_pointers/src/main.rs:55:24 [INFO] [stdout] | [INFO] [stdout] 55 | Rc_Cons(value, list) => *value.borrow_mut() += 10, [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_list` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `largest_with_copy` [INFO] [stdout] --> generics/src/main.rs:62:4 [INFO] [stdout] | [INFO] [stdout] 62 | fn largest_with_copy(list: &[T]) -> T [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "0591389ba8fa5ec7efd3bf1d42ff9dc67143ee0f5fa67dd4ed8338877bbcea55", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0591389ba8fa5ec7efd3bf1d42ff9dc67143ee0f5fa67dd4ed8338877bbcea55", kill_on_drop: false }` [INFO] [stdout] 0591389ba8fa5ec7efd3bf1d42ff9dc67143ee0f5fa67dd4ed8338877bbcea55