[INFO] cloning repository https://github.com/olayad/official-rust-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/olayad/official-rust-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Folayad%2Fofficial-rust-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Folayad%2Fofficial-rust-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b7b12c80818d6872f038a4c072e6d4cd6722b794
[INFO] testing olayad/official-rust-book against 1.91.0 for beta-1.92-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Folayad%2Fofficial-rust-book" "/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/olayad/official-rust-book
[INFO] finished tweaking git repo https://github.com/olayad/official-rust-book
[INFO] tweaked toml for git repo https://github.com/olayad/official-rust-book written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/olayad/official-rust-book on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/olayad/official-rust-book 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 284d96d54728be99664dea03ab2b7cfeff926e44ea1f81d0944b93fa59dd3948
[INFO] running `Command { std: "docker" "start" "-a" "284d96d54728be99664dea03ab2b7cfeff926e44ea1f81d0944b93fa59dd3948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "284d96d54728be99664dea03ab2b7cfeff926e44ea1f81d0944b93fa59dd3948", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "284d96d54728be99664dea03ab2b7cfeff926e44ea1f81d0944b93fa59dd3948", kill_on_drop: false }`
[INFO] [stdout] 284d96d54728be99664dea03ab2b7cfeff926e44ea1f81d0944b93fa59dd3948
[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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 56893d1f6c7a0a195254c20ae36745172d1fadc1b9288d06298e617ccbf3056c
[INFO] running `Command { std: "docker" "start" "-a" "56893d1f6c7a0a195254c20ae36745172d1fadc1b9288d06298e617ccbf3056c", kill_on_drop: false }`
[INFO] [stderr]    Compiling official-rustbook-ex v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0106]: missing lifetime specifier
[INFO] [stdout]  --> src/bin/ch05-structs.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 |     username: &str,
[INFO] [stdout]   |               ^ expected named lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout] help: consider introducing a named lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout] 1 ~ struct User<'a> {
[INFO] [stdout] 2 |     active: bool,
[INFO] [stdout] 3 ~     username: &'a str,
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0106]: missing lifetime specifier
[INFO] [stdout]  --> src/bin/ch05-structs.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 |     email: &str,
[INFO] [stdout]   |            ^ expected named lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout] help: consider introducing a named lifetime parameter
[INFO] [stdout]   |
[INFO] [stdout] 1 ~ struct User<'a> {
[INFO] [stdout] 2 |     active: bool,
[INFO] [stdout] 3 |     username: &str,
[INFO] [stdout] 4 ~     email: &'a str,
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0106`.
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `rand`
[INFO] [stdout]  --> src/bin/ch02-guessing_game.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use rand::Rng;
[INFO] [stdout]   |     ^^^^ use of unresolved module or unlinked crate `rand`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `rand`, use `cargo add rand` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `official-rustbook-ex` (bin "ch05-structs") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0506]: cannot assign to `a` because it is borrowed
[INFO] [stdout]  --> src/bin/ch03-mut_references.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let b = &mut a;
[INFO] [stdout]   |             ------ `a` is borrowed here
[INFO] [stdout] 4 |     *b = String::from("another string");
[INFO] [stdout] 5 |     a = String::from("world");
[INFO] [stdout]   |     ^ `a` is assigned to here but it was already borrowed
[INFO] [stdout] 6 |     println!("{}", b);
[INFO] [stdout]   |                    - borrow later used here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0506`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `official-rustbook-ex` (bin "ch03-mut_references") due to 1 previous error
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/ch03-fibonacci.rs:39:18
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn nth_fibonacci(mut second_last:u32, mut last:u32, target:u32) -> u32 {
[INFO] [stdout]    |                  ----^^^^^^^^^^^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/ch03-fibonacci.rs:39:39
[INFO] [stdout]    |
[INFO] [stdout] 39 | fn nth_fibonacci(mut second_last:u32, mut last:u32, target:u32) -> u32 {
[INFO] [stdout]    |                                       ----^^^^
[INFO] [stdout]    |                                       |
[INFO] [stdout]    |                                       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `nth_fibonacci_dom` is never used
[INFO] [stdout]   --> src/bin/ch03-fibonacci.rs:23:4
[INFO] [stdout]    |
[INFO] [stdout] 23 | fn nth_fibonacci_dom(second_last:u32, last:u32, target: u32, count: u32) -> u32 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `string`
[INFO] [stdout]   --> src/bin/ch03-control_flow.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut unit = string::new();
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    use of unresolved module or unlinked crate `string`
[INFO] [stdout]    |                    help: a struct with a similar name exists (notice the capitalization): `String`
[INFO] [stdout]    |
[INFO] [stdout]    = help: if you wanted to use a crate named `string`, use `cargo add string` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `official-rustbook-ex` (bin "ch03-control_flow") due to 1 previous error
[INFO] [stdout] error[E0433]: failed to resolve: use of unresolved module or unlinked crate `rand`
[INFO] [stdout]  --> src/bin/ch02-guessing_game.rs:7:25
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let secret_number = rand::thread_rng().gen_range(1..101);
[INFO] [stdout]   |                         ^^^^ use of unresolved module or unlinked crate `rand`
[INFO] [stdout]   |
[INFO] [stdout]   = help: if you wanted to use a crate named `rand`, use `cargo add rand` to add it to your `Cargo.toml`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0433.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `official-rustbook-ex` (bin "ch02-guessing_game") due to 2 previous errors
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "56893d1f6c7a0a195254c20ae36745172d1fadc1b9288d06298e617ccbf3056c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "56893d1f6c7a0a195254c20ae36745172d1fadc1b9288d06298e617ccbf3056c", kill_on_drop: false }`
[INFO] [stdout] 56893d1f6c7a0a195254c20ae36745172d1fadc1b9288d06298e617ccbf3056c
