[INFO] cloning repository https://github.com/kristiansel/rust-demo
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kristiansel/rust-demo" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkristiansel%2Frust-demo", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkristiansel%2Frust-demo'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 17f102cb7592f107e67adebf3a66f3eeace8b6f6
[INFO] checking kristiansel/rust-demo against try#0bdee9e879c87b7211d316e9152109cfd46c576b for pr-150097
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkristiansel%2Frust-demo" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kristiansel/rust-demo
[INFO] finished tweaking git repo https://github.com/kristiansel/rust-demo
[INFO] tweaked toml for git repo https://github.com/kristiansel/rust-demo written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kristiansel/rust-demo on toolchain 0bdee9e879c87b7211d316e9152109cfd46c576b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kristiansel/rust-demo 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" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca64d11f098260d8296a58e9d23ccb38e6bba37cfaed02c3fb9261addd6aa0aa
[INFO] running `Command { std: "docker" "start" "-a" "ca64d11f098260d8296a58e9d23ccb38e6bba37cfaed02c3fb9261addd6aa0aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca64d11f098260d8296a58e9d23ccb38e6bba37cfaed02c3fb9261addd6aa0aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca64d11f098260d8296a58e9d23ccb38e6bba37cfaed02c3fb9261addd6aa0aa", kill_on_drop: false }`
[INFO] [stdout] ca64d11f098260d8296a58e9d23ccb38e6bba37cfaed02c3fb9261addd6aa0aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:845e597a41426bbf2703be69acdb67d10b6de511142d05cba7bbe119c898b2c7" "/opt/rustwide/cargo-home/bin/cargo" "+0bdee9e879c87b7211d316e9152109cfd46c576b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e5ea28cf30cda9e4f7c0d113f429e931f994f77d2c3dd6f411e6b799a9738e9a
[INFO] running `Command { std: "docker" "start" "-a" "e5ea28cf30cda9e4f7c0d113f429e931f994f77d2c3dd6f411e6b799a9738e9a", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `msg1`
[INFO] [stdout]   --> examples/02_enums.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let msg1 = Message::Move { x: 10, y: 20 };
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_msg1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking rust-demo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `msg2`
[INFO] [stdout]   --> examples/02_enums.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let msg2 = Message::Write {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_msg2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg3`
[INFO] [stdout]   --> examples/02_enums.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let msg3 = Message::ChangeColor(255, 0, 0);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_msg3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `msg4`
[INFO] [stdout]   --> examples/02_enums.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let msg4 = Message::Quit;
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_msg4`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> examples/02_enums.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let c = {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]  --> examples/02_enums.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Move { x: i32, y: i32 },
[INFO] [stdout]   |     ----   ^       ^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `message` is never read
[INFO] [stdout]  --> examples/02_enums.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Write { message: String },
[INFO] [stdout]   |     -----   ^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]  --> examples/02_enums.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]   |     ----------- ^^^  ^^^  ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 5 -     ChangeColor(i32, i32, i32),
[INFO] [stdout] 5 +     ChangeColor((), (), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `process_message` is never used
[INFO] [stdout]  --> examples/02_enums.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn process_message(msg: Message) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Greet` is never used
[INFO] [stdout]  --> examples/04_traits.rs:2:7
[INFO] [stdout]   |
[INFO] [stdout] 2 | trait Greet {
[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: `result`
[INFO] [stdout]   --> examples/09_lifetimes.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let result = longest(&str1, &str2);
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `shout`
[INFO] [stdout]  --> examples/06_dynamic_dispatch.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn shout();
[INFO] [stdout]   |     ----------- `shout` from trait
[INFO] [stdout] ...
[INFO] [stdout] 9 | impl Animal for Dog {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^ missing `shout` in implementation
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0046]: not all trait items implemented, missing: `shout`
[INFO] [stdout]   --> examples/06_dynamic_dispatch.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout]  3 |     fn shout();
[INFO] [stdout]    |     ----------- `shout` from trait
[INFO] [stdout] ...
[INFO] [stdout] 15 | impl Animal for Cat {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^ missing `shout` in implementation
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0038]: the trait `Animal` is not dyn compatible
[INFO] [stdout]   --> examples/06_dynamic_dispatch.rs:21:31
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn make_animal_speak(animal: &dyn Animal) {
[INFO] [stdout]    |                               ^^^^^^^^^^ `Animal` is not dyn compatible
[INFO] [stdout]    |
[INFO] [stdout] note: for a trait to be dyn compatible it needs to allow building a vtable
[INFO] [stdout]       for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
[INFO] [stdout]   --> examples/06_dynamic_dispatch.rs:3:8
[INFO] [stdout]    |
[INFO] [stdout]  1 | trait Animal {
[INFO] [stdout]    |       ------ this trait is not dyn compatible...
[INFO] [stdout]  2 |     fn speak(&self);
[INFO] [stdout]  3 |     fn shout();
[INFO] [stdout]    |        ^^^^^ ...because associated function `shout` has no `self` parameter
[INFO] [stdout]    = help: the following types implement `Animal`:
[INFO] [stdout]              Dog
[INFO] [stdout]              Cat
[INFO] [stdout]            consider defining an enum where each variant holds one of these types,
[INFO] [stdout]            implementing `Animal` for this new enum and using it instead
[INFO] [stdout] help: consider turning `shout` into a method by giving it a `&self` argument
[INFO] [stdout]    |
[INFO] [stdout]  3 |     fn shout(&self);
[INFO] [stdout]    |              +++++
[INFO] [stdout] help: alternatively, consider constraining `shout` so it does not apply to trait objects
[INFO] [stdout]    |
[INFO] [stdout]  3 |     fn shout() where Self: Sized;
[INFO] [stdout]    |                +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `age` are never read
[INFO] [stdout]  --> examples/10_derive_macro.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Person {
[INFO] [stdout]   |        ------ fields in this struct
[INFO] [stdout] 3 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 4 |     age: u32,
[INFO] [stdout]   |     ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Person` has derived impls for the traits `Clone` and `Debug`, but these are 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] error[E0038]: the trait `Animal` is not dyn compatible
[INFO] [stdout]   --> examples/06_dynamic_dispatch.rs:29:23
[INFO] [stdout]    |
[INFO] [stdout] 29 |     make_animal_speak(&dog);
[INFO] [stdout]    |                       ^^^^ `Animal` is not dyn compatible
[INFO] [stdout]    |
[INFO] [stdout] note: for a trait to be dyn compatible it needs to allow building a vtable
[INFO] [stdout]       for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
[INFO] [stdout]   --> examples/06_dynamic_dispatch.rs:3:8
[INFO] [stdout]    |
[INFO] [stdout]  1 | trait Animal {
[INFO] [stdout]    |       ------ this trait is not dyn compatible...
[INFO] [stdout]  2 |     fn speak(&self);
[INFO] [stdout]  3 |     fn shout();
[INFO] [stdout]    |        ^^^^^ ...because associated function `shout` has no `self` parameter
[INFO] [stdout]    = help: the following types implement `Animal`:
[INFO] [stdout]              Dog
[INFO] [stdout]              Cat
[INFO] [stdout]            consider defining an enum where each variant holds one of these types,
[INFO] [stdout]            implementing `Animal` for this new enum and using it instead
[INFO] [stdout] help: consider turning `shout` into a method by giving it a `&self` argument
[INFO] [stdout]    |
[INFO] [stdout]  3 |     fn shout(&self);
[INFO] [stdout]    |              +++++
[INFO] [stdout] help: alternatively, consider constraining `shout` so it does not apply to trait objects
[INFO] [stdout]    |
[INFO] [stdout]  3 |     fn shout() where Self: Sized;
[INFO] [stdout]    |                +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0038]: the trait `Animal` is not dyn compatible
[INFO] [stdout]   --> examples/06_dynamic_dispatch.rs:30:23
[INFO] [stdout]    |
[INFO] [stdout] 30 |     make_animal_speak(&cat);
[INFO] [stdout]    |                       ^^^^ `Animal` is not dyn compatible
[INFO] [stdout]    |
[INFO] [stdout] note: for a trait to be dyn compatible it needs to allow building a vtable
[INFO] [stdout]       for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
[INFO] [stdout]   --> examples/06_dynamic_dispatch.rs:3:8
[INFO] [stdout]    |
[INFO] [stdout]  1 | trait Animal {
[INFO] [stdout]    |       ------ this trait is not dyn compatible...
[INFO] [stdout]  2 |     fn speak(&self);
[INFO] [stdout]  3 |     fn shout();
[INFO] [stdout]    |        ^^^^^ ...because associated function `shout` has no `self` parameter
[INFO] [stdout]    = help: the following types implement `Animal`:
[INFO] [stdout]              Dog
[INFO] [stdout]              Cat
[INFO] [stdout]            consider defining an enum where each variant holds one of these types,
[INFO] [stdout]            implementing `Animal` for this new enum and using it instead
[INFO] [stdout] help: consider turning `shout` into a method by giving it a `&self` argument
[INFO] [stdout]    |
[INFO] [stdout]  3 |     fn shout(&self);
[INFO] [stdout]    |              +++++
[INFO] [stdout] help: alternatively, consider constraining `shout` so it does not apply to trait objects
[INFO] [stdout]    |
[INFO] [stdout]  3 |     fn shout() where Self: Sized;
[INFO] [stdout]    |                +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0038, E0046.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0038`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust-demo` (example "06_dynamic_dispatch") due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "e5ea28cf30cda9e4f7c0d113f429e931f994f77d2c3dd6f411e6b799a9738e9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5ea28cf30cda9e4f7c0d113f429e931f994f77d2c3dd6f411e6b799a9738e9a", kill_on_drop: false }`
[INFO] [stdout] e5ea28cf30cda9e4f7c0d113f429e931f994f77d2c3dd6f411e6b799a9738e9a
