[INFO] cloning repository https://github.com/brianobot/comprehensive_rust_seminar
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/brianobot/comprehensive_rust_seminar" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianobot%2Fcomprehensive_rust_seminar", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianobot%2Fcomprehensive_rust_seminar'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] af5b43a498e4bc8c23fe8d817995cb223ac3dd23
[INFO] fixing brianobot/comprehensive_rust_seminar against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbrianobot%2Fcomprehensive_rust_seminar" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/brianobot/comprehensive_rust_seminar
[INFO] finished tweaking git repo https://github.com/brianobot/comprehensive_rust_seminar
[INFO] tweaked toml for git repo https://github.com/brianobot/comprehensive_rust_seminar written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/brianobot/comprehensive_rust_seminar on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/brianobot/comprehensive_rust_seminar 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" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 6fa4cc77e32798efc91bdf414c0c18f1bdf7184c552b3853c84fcc64ac43c4c3
[INFO] running `Command { std: "docker" "start" "6fa4cc77e32798efc91bdf414c0c18f1bdf7184c552b3853c84fcc64ac43c4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6fa4cc77e32798efc91bdf414c0c18f1bdf7184c552b3853c84fcc64ac43c4c3" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6fa4cc77e32798efc91bdf414c0c18f1bdf7184c552b3853c84fcc64ac43c4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "6fa4cc77e32798efc91bdf414c0c18f1bdf7184c552b3853c84fcc64ac43c4c3" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.105
[INFO] [stderr]    Compiling quote v1.0.43
[INFO] [stderr]    Compiling libc v0.2.180
[INFO] [stderr]    Compiling zerocopy v0.8.33
[INFO] [stderr]    Compiling syn v2.0.114
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking ppv-lite86 v0.2.21
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking learn v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/32_panics.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     dbg!(result);
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let _ = dbg!(result);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/bin/32_panics.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     dbg!(result);
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let _ = dbg!(result);
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]  --> src/bin/20a_exercise.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::cmp::Ordering;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/bin/23_standard_library_trait.rs:78:12
[INFO] [stdout]    |
[INFO] [stdout] 78 |     struct Point {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `next_truck` is never read
[INFO] [stdout]   --> src/bin/25_smart_pointers.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     struct Truck {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 18 |         next_truck: Option<Box<Truck>>,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Truck` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Up`, `Down`, and `Left` are never constructed
[INFO] [stdout]   --> src/bin/16_destructuring_structs_and_enums.rs:7:5
[INFO] [stdout]    |
[INFO] [stdout]  6 | enum Direction {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout]  7 |     Up(i32),
[INFO] [stdout]    |     ^^
[INFO] [stdout]  8 |     Down(i32),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]  9 |     Right(i32),
[INFO] [stdout] 10 |     Left(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: function `return_dyn_error` is never used
[INFO] [stdout]   --> src/bin/33_results.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn return_dyn_error() -> Result<i32, Box<dyn Error>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0405]: cannot find trait `Pet` in this scope
[INFO] [stdout]    --> src/bin/20_generics.rs:100:26
[INFO] [stdout]     |
[INFO] [stdout] 100 |     fn dynamic(pet: &dyn Pet) {
[INFO] [stdout]     |                          ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0405`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `p2`
[INFO] [stdout]  --> src/bin/34_unsafe_rust.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let p2 = p1 as *const i32;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_p2`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn` (bin "20_generics") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/bin/33b_exercise.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::error::Error`
[INFO] [stdout]  --> src/bin/33b_exercise.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::error::Error;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `33b_exercise`
[INFO] [stdout]   --> src/bin/33b_exercise.rs:73:2
[INFO] [stdout]    |
[INFO] [stdout] 73 | }
[INFO] [stdout]    |  ^ consider adding a `main` function to `src/bin/33b_exercise.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Add` and `Mul` are never constructed
[INFO] [stdout]  --> src/bin/33b_exercise.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | enum Operation {
[INFO] [stdout]   |      --------- variants in this enum
[INFO] [stdout] 6 |     Add,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 7 |     Sub,
[INFO] [stdout] 8 |     Mul,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Operation` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stdout] warning: function `return_dyn_error` is never used
[INFO] [stdout]   --> src/bin/33_results.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn return_dyn_error() -> Result<i32, Box<dyn Error>> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learn` (bin "33b_exercise") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "6fa4cc77e32798efc91bdf414c0c18f1bdf7184c552b3853c84fcc64ac43c4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6fa4cc77e32798efc91bdf414c0c18f1bdf7184c552b3853c84fcc64ac43c4c3", kill_on_drop: false }`
[INFO] [stdout] 6fa4cc77e32798efc91bdf414c0c18f1bdf7184c552b3853c84fcc64ac43c4c3
