[INFO] cloning repository https://github.com/cuongtranba/rust-by-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cuongtranba/rust-by-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcuongtranba%2Frust-by-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcuongtranba%2Frust-by-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0be4c5c049dc54b2bb7cc8e9cae2202e7d4a3094
[INFO] testing cuongtranba/rust-by-example against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcuongtranba%2Frust-by-example" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/cuongtranba/rust-by-example
[INFO] finished tweaking git repo https://github.com/cuongtranba/rust-by-example
[INFO] tweaked toml for git repo https://github.com/cuongtranba/rust-by-example written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/cuongtranba/rust-by-example on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/cuongtranba/rust-by-example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f780fd6112d22eef7a47d228ee3483e8b9e6f68228d82138dd5adafe25164cde
[INFO] running `Command { std: "docker" "start" "-a" "f780fd6112d22eef7a47d228ee3483e8b9e6f68228d82138dd5adafe25164cde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f780fd6112d22eef7a47d228ee3483e8b9e6f68228d82138dd5adafe25164cde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f780fd6112d22eef7a47d228ee3483e8b9e6f68228d82138dd5adafe25164cde", kill_on_drop: false }`
[INFO] [stdout] f780fd6112d22eef7a47d228ee3483e8b9e6f68228d82138dd5adafe25164cde
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 59c42202296c3c4e66670a94313b5022a8dca62b96fa58ebe2f71cccfcc4f3d0
[INFO] running `Command { std: "docker" "start" "-a" "59c42202296c3c4e66670a94313b5022a8dca62b96fa58ebe2f71cccfcc4f3d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust-by-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]  --> src/bin/slice.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let word = first_word(&my_string[0..6]);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]  --> src/bin/slice.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let word = first_word(&my_string[..]);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]  --> src/bin/slice.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let word = first_word(&my_string);
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/slice.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let word = first_word(&my_string_literal[0..6]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/slice.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let word = first_word(&my_string_literal[..]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/slice.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let word = first_word(my_string_literal);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0428]: the name `Structure` is defined multiple times
[INFO] [stdout]   --> src/bin/formatting.rs:52:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     struct Structure(i32);
[INFO] [stdout]    |     ---------------------- previous definition of the type `Structure` here
[INFO] [stdout] ...
[INFO] [stdout] 52 |     struct Structure(i32);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^ `Structure` redefined here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Structure` must be defined only once in the type namespace of this block
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0382]: borrow of moved value: `s2`
[INFO] [stdout]   --> src/bin/ownership.rs:25:32
[INFO] [stdout]    |
[INFO] [stdout] 21 |     let s2: String = String::from("hello");
[INFO] [stdout]    |         -- move occurs because `s2` has type `String`, which does not implement the `Copy` trait
[INFO] [stdout] 22 |     let s3 = take_and_give_back(s2);
[INFO] [stdout]    |                                 -- value moved here
[INFO] [stdout] ...
[INFO] [stdout] 25 |     println!("s1 = {s1}, s2 = {s2}, s3 = {s3}")
[INFO] [stdout]    |                                ^^ value borrowed here after move
[INFO] [stdout]    |
[INFO] [stdout] note: consider changing this parameter type in function `take_and_give_back` to borrow instead if owning the value isn't necessary
[INFO] [stdout]   --> src/bin/ownership.rs:41:26
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn take_and_give_back(v: String) -> String {
[INFO] [stdout]    |    ------------------    ^^^^^^ this parameter takes ownership of the value
[INFO] [stdout]    |    |
[INFO] [stdout]    |    in this function
[INFO] [stdout]    = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] help: consider cloning the value if the performance cost is acceptable
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let s3 = take_and_give_back(s2.clone());
[INFO] [stdout]    |                                   ++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0382`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-by-example` (bin "ownership") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0428`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-by-example` (bin "formatting") due to 1 previous error
[INFO] [stdout] warning: fields `active`, `username`, and `sign_in_count` are never read
[INFO] [stdout]  --> src/bin/structs.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 2 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 3 |     username: String,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 4 |     email: String,
[INFO] [stdout] 5 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/bin/function.rs:14:23
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn samele_with_params(v: i32) -> i32 {
[INFO] [stdout]    |                       ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `samele_with_params` is never used
[INFO] [stdout]   --> src/bin/function.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn samele_with_params(v: i32) -> i32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]  --> src/bin/ref_borrow.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let r1 = &s; // no problem
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]  --> src/bin/ref_borrow.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let r2 = &s; // no problem
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_len` is never used
[INFO] [stdout]   --> src/bin/ref_borrow.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn calculate_len(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change` is never used
[INFO] [stdout]   --> src/bin/ref_borrow.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn change(s: &mut String) {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_POINTS` is never used
[INFO] [stdout]  --> src/bin/variables_mutability.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const MAX_POINTS: u32 = 100_000; // const is always immutable
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "59c42202296c3c4e66670a94313b5022a8dca62b96fa58ebe2f71cccfcc4f3d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "59c42202296c3c4e66670a94313b5022a8dca62b96fa58ebe2f71cccfcc4f3d0", kill_on_drop: false }`
[INFO] [stdout] 59c42202296c3c4e66670a94313b5022a8dca62b96fa58ebe2f71cccfcc4f3d0