[INFO] cloning repository https://github.com/preciq/rust_tokio_tokio_official_tutorial_code_minis
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/preciq/rust_tokio_tokio_official_tutorial_code_minis" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreciq%2Frust_tokio_tokio_official_tutorial_code_minis", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreciq%2Frust_tokio_tokio_official_tutorial_code_minis'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8d46d826b3f96594b88ffc41a47fd697b5ab2211
[INFO] testing preciq/rust_tokio_tokio_official_tutorial_code_minis against master#c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpreciq%2Frust_tokio_tokio_official_tutorial_code_minis" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/preciq/rust_tokio_tokio_official_tutorial_code_minis
[INFO] finished tweaking git repo https://github.com/preciq/rust_tokio_tokio_official_tutorial_code_minis
[INFO] tweaked toml for git repo https://github.com/preciq/rust_tokio_tokio_official_tutorial_code_minis written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/preciq/rust_tokio_tokio_official_tutorial_code_minis on toolchain c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/preciq/rust_tokio_tokio_official_tutorial_code_minis 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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded mini-redis v0.4.1
[INFO] [stderr]   Downloaded tracing-serde v0.1.3
[INFO] [stderr]   Downloaded atoi v0.3.3
[INFO] [stderr]   Downloaded tracing-log v0.1.4
[INFO] [stderr]   Downloaded proc-macro2 v1.0.70
[INFO] [stderr]   Downloaded iana-time-zone v0.1.58
[INFO] [stderr]   Downloaded windows-core v0.51.1
[INFO] [stderr]   Downloaded serde_derive v1.0.193
[INFO] [stderr]   Downloaded unicode-segmentation v1.10.1
[INFO] [stderr]   Downloaded memchr v2.6.4
[INFO] [stderr]   Downloaded serde v1.0.193
[INFO] [stderr]   Downloaded serde_json v1.0.108
[INFO] [stderr]   Downloaded syn v2.0.41
[INFO] [stderr]   Downloaded chrono v0.4.31
[INFO] [stderr]   Downloaded object v0.32.1
[INFO] [stderr]   Downloaded tokio v1.35.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d22d8e7f2b597f7d3d0abdc7e838a256d0a5cf4cf03c3de9fc70bbf22072d30a
[INFO] running `Command { std: "docker" "start" "-a" "d22d8e7f2b597f7d3d0abdc7e838a256d0a5cf4cf03c3de9fc70bbf22072d30a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d22d8e7f2b597f7d3d0abdc7e838a256d0a5cf4cf03c3de9fc70bbf22072d30a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d22d8e7f2b597f7d3d0abdc7e838a256d0a5cf4cf03c3de9fc70bbf22072d30a", kill_on_drop: false }`
[INFO] [stdout] d22d8e7f2b597f7d3d0abdc7e838a256d0a5cf4cf03c3de9fc70bbf22072d30a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b012f71dc3c0ed6fefd284f2680245160063698a713240060660a2f74971f859
[INFO] running `Command { std: "docker" "start" "-a" "b012f71dc3c0ed6fefd284f2680245160063698a713240060660a2f74971f859", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.70
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling libc v0.2.151
[INFO] [stderr]    Compiling pin-project-lite v0.2.13
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling futures-core v0.3.30
[INFO] [stderr]    Compiling serde v1.0.193
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling smallvec v1.11.2
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling slab v0.4.9
[INFO] [stderr]    Compiling regex-syntax v0.8.2
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling unicode-segmentation v1.10.1
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling syn v2.0.41
[INFO] [stderr]    Compiling regex-syntax v0.6.29
[INFO] [stderr]    Compiling unicode-width v0.1.11
[INFO] [stderr]    Compiling futures-sink v0.3.30
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling futures-channel v0.3.30
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling parking_lot v0.12.1
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling socket2 v0.5.5
[INFO] [stderr]    Compiling mio v0.8.10
[INFO] [stderr]    Compiling signal-hook-registry v1.4.1
[INFO] [stderr]    Compiling regex-automata v0.4.3
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling bytes v1.5.0
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling itoa v1.0.10
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling futures-io v0.3.30
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling iana-time-zone v0.1.58
[INFO] [stderr]    Compiling ryu v1.0.16
[INFO] [stderr]    Compiling futures-task v0.3.30
[INFO] [stderr]    Compiling memchr v2.6.4
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling regex v1.10.2
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling chrono v0.4.31
[INFO] [stderr]    Compiling tracing-serde v0.1.3
[INFO] [stderr]    Compiling tracing-log v0.1.4
[INFO] [stderr]    Compiling sharded-slab v0.1.7
[INFO] [stderr]    Compiling thread_local v1.1.7
[INFO] [stderr]    Compiling atoi v0.3.3
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling tracing-attributes v0.1.27
[INFO] [stderr]    Compiling futures-macro v0.3.30
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]    Compiling async-stream-impl v0.3.5
[INFO] [stderr]    Compiling tokio v1.35.0
[INFO] [stderr]    Compiling async-stream v0.3.5
[INFO] [stderr]    Compiling pin-project v1.1.3
[INFO] [stderr]    Compiling structopt v0.3.26
[INFO] [stderr]    Compiling futures-util v0.3.30
[INFO] [stderr]    Compiling tracing v0.1.40
[INFO] [stderr]    Compiling tracing-futures v0.2.5
[INFO] [stderr]    Compiling tracing-subscriber v0.2.25
[INFO] [stderr]    Compiling futures-executor v0.3.30
[INFO] [stderr]    Compiling futures v0.3.30
[INFO] [stderr]    Compiling tokio-stream v0.1.14
[INFO] [stderr]    Compiling mini-redis v0.4.1
[INFO] [stderr]    Compiling tokio_official_tutorial_code_minis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `receive_from_manager`
[INFO] [stdout]   --> src/bin/client.rs:93:28
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let (send_to_task, receive_from_manager) = oneshot::channel();
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receive_from_manager`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `response`
[INFO] [stdout]   --> src/bin/client.rs:50:21
[INFO] [stdout]    |
[INFO] [stdout] 50 |                     response
[INFO] [stdout]    |                     ^^^^^^^^ help: try ignoring the field: `response: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 09s
[INFO] running `Command { std: "docker" "inspect" "b012f71dc3c0ed6fefd284f2680245160063698a713240060660a2f74971f859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b012f71dc3c0ed6fefd284f2680245160063698a713240060660a2f74971f859", kill_on_drop: false }`
[INFO] [stdout] b012f71dc3c0ed6fefd284f2680245160063698a713240060660a2f74971f859
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8f453cb504e0453cd783a7c29812180d46457380dafb2e5c7b496becff807f27
[INFO] running `Command { std: "docker" "start" "-a" "8f453cb504e0453cd783a7c29812180d46457380dafb2e5c7b496becff807f27", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio_official_tutorial_code_minis v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `Duration`
[INFO] [stdout]   --> examples/10_8_implementing_waker_in_a_future.rs:10:17
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::time::{Duration, Instant};
[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 `Delay` is never constructed
[INFO] [stdout]   --> examples/10_8_implementing_waker_in_a_future.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Delay {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/11_12_resuming_a_branch_via_conditions_in_handler.rs:12:10
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let (mut tx, mut rx) = tokio::sync::mpsc::channel(128);
[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: unused variable: `tx1`
[INFO] [stdout]  --> examples/11_11_looping_over_multiple_channels_with_select.rs:9:10
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let (tx1, mut rx1) = mpsc::channel(128);
[INFO] [stdout]   |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx2`
[INFO] [stdout]   --> examples/11_11_looping_over_multiple_channels_with_select.rs:10:10
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let (tx2, mut rx2) = mpsc::channel(128);
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx3`
[INFO] [stdout]   --> examples/11_11_looping_over_multiple_channels_with_select.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let (tx3, mut rx3) = mpsc::channel(128);
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/11_6_select_on_a_tcp_listener_connection_vs_oneshot.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 33 | /             loop {
[INFO] [stdout] 34 | |                 let (socket, _) = listener.accept().await?;
[INFO] [stdout] 35 | |                 tokio::spawn(async move { process(socket) });
[INFO] [stdout] 36 | |             }
[INFO] [stdout]    | |_____________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 39 |               Ok::<_, io::Error>(())
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/11_6_select_on_a_tcp_listener_connection_vs_oneshot.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let mut listener = TcpListener::bind("localhost:3465").await?;
[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: unused variable: `tx1`
[INFO] [stdout]   --> examples/11_3_implementation_of_the_select_macro.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let (tx1, rx1) = oneshot::channel();
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tx2`
[INFO] [stdout]   --> examples/11_3_implementation_of_the_select_macro.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let (tx2, rx2) = oneshot::channel();
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Delay` is never constructed
[INFO] [stdout]   --> examples/10_4_internals_of_calling_a_future.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Delay {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `MainFuture` is never used
[INFO] [stdout]   --> examples/10_4_internals_of_calling_a_future.rs:33:6
[INFO] [stdout]    |
[INFO] [stdout] 33 | enum MainFuture {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `receive_from_manager`
[INFO] [stdout]   --> src/bin/client.rs:93:28
[INFO] [stdout]    |
[INFO] [stdout] 93 |         let (send_to_task, receive_from_manager) = oneshot::channel();
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receive_from_manager`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `response`
[INFO] [stdout]   --> src/bin/client.rs:50:21
[INFO] [stdout]    |
[INFO] [stdout] 50 |                     response
[INFO] [stdout]    |                     ^^^^^^^^ help: try ignoring the field: `response: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> examples/11_8_error_handling_in_select.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 36 | /             loop {
[INFO] [stdout] 37 | |                 let (socket, _) = listener.accept().await?;
[INFO] [stdout] 38 | |                 tokio::spawn(async move { process(socket) });
[INFO] [stdout] 39 | |             }
[INFO] [stdout]    | |_____________- any code following this expression is unreachable
[INFO] [stdout] ...
[INFO] [stdout] 42 |               Ok::<_, io::Error>(())
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `receive_from_manager`
[INFO] [stdout]   --> examples/7_3_client_use_with_6_2_server_two_way_communication_with_mpsc_and_oneshot.rs:87:28
[INFO] [stdout]    |
[INFO] [stdout] 87 |         let (send_to_task, receive_from_manager) = oneshot::channel();
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receive_from_manager`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `response`
[INFO] [stdout]   --> examples/7_3_client_use_with_6_2_server_two_way_communication_with_mpsc_and_oneshot.rs:44:21
[INFO] [stdout]    |
[INFO] [stdout] 44 |                     response
[INFO] [stdout]    |                     ^^^^^^^^ help: try ignoring the field: `response: _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 22.67s
[INFO] running `Command { std: "docker" "inspect" "8f453cb504e0453cd783a7c29812180d46457380dafb2e5c7b496becff807f27", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f453cb504e0453cd783a7c29812180d46457380dafb2e5c7b496becff807f27", kill_on_drop: false }`
[INFO] [stdout] 8f453cb504e0453cd783a7c29812180d46457380dafb2e5c7b496becff807f27
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c90bcb9571b7aab0d8beaa2ce8a998ffaf079d38" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6406fcdb716defeb1fffcd9b9419b11c0e7bd6879a505716302c22e685498d31
[INFO] running `Command { std: "docker" "start" "-a" "6406fcdb716defeb1fffcd9b9419b11c0e7bd6879a505716302c22e685498d31", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/11_12_resuming_a_branch_via_conditions_in_handler.rs:12:10
[INFO] [stderr]    |
[INFO] [stderr] 12 |     let (mut tx, mut rx) = tokio::sync::mpsc::channel(128);
[INFO] [stderr]    |          ----^^
[INFO] [stderr]    |          |
[INFO] [stderr]    |          help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio_official_tutorial_code_minis` (example "11_12_resuming_a_branch_via_conditions_in_handler") generated 1 warning (run `cargo fix --example "11_12_resuming_a_branch_via_conditions_in_handler" -p tokio_official_tutorial_code_minis` to apply 1 suggestion)
[INFO] [stderr] warning: unused variable: `receive_from_manager`
[INFO] [stderr]   --> examples/7_3_client_use_with_6_2_server_two_way_communication_with_mpsc_and_oneshot.rs:87:28
[INFO] [stderr]    |
[INFO] [stderr] 87 |         let (send_to_task, receive_from_manager) = oneshot::channel();
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receive_from_manager`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `response`
[INFO] [stderr]   --> examples/7_3_client_use_with_6_2_server_two_way_communication_with_mpsc_and_oneshot.rs:44:21
[INFO] [stderr]    |
[INFO] [stderr] 44 |                     response
[INFO] [stderr]    |                     ^^^^^^^^ help: try ignoring the field: `response: _`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> examples/11_8_error_handling_in_select.rs:42:13
[INFO] [stderr]    |
[INFO] [stderr] 36 | /             loop {
[INFO] [stderr] 37 | |                 let (socket, _) = listener.accept().await?;
[INFO] [stderr] 38 | |                 tokio::spawn(async move { process(socket) });
[INFO] [stderr] 39 | |             }
[INFO] [stderr]    | |_____________- any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 42 |               Ok::<_, io::Error>(())
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio_official_tutorial_code_minis` (example "7_3_client_use_with_6_2_server_two_way_communication_with_mpsc_and_oneshot") generated 2 warnings (run `cargo fix --example "7_3_client_use_with_6_2_server_two_way_communication_with_mpsc_and_oneshot" -p tokio_official_tutorial_code_minis` to apply 2 suggestions)
[INFO] [stderr] warning: `tokio_official_tutorial_code_minis` (example "11_8_error_handling_in_select") generated 1 warning
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> examples/11_6_select_on_a_tcp_listener_connection_vs_oneshot.rs:39:13
[INFO] [stderr]    |
[INFO] [stderr] 33 | /             loop {
[INFO] [stderr] 34 | |                 let (socket, _) = listener.accept().await?;
[INFO] [stderr] 35 | |                 tokio::spawn(async move { process(socket) });
[INFO] [stderr] 36 | |             }
[INFO] [stderr]    | |_____________- any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 39 |               Ok::<_, io::Error>(())
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/11_6_select_on_a_tcp_listener_connection_vs_oneshot.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let mut listener = TcpListener::bind("localhost:3465").await?;
[INFO] [stderr]    |         ----^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio_official_tutorial_code_minis` (example "11_6_select_on_a_tcp_listener_connection_vs_oneshot") generated 2 warnings (run `cargo fix --example "11_6_select_on_a_tcp_listener_connection_vs_oneshot" -p tokio_official_tutorial_code_minis` to apply 1 suggestion)
[INFO] [stderr] warning: struct `Delay` is never constructed
[INFO] [stderr]   --> examples/10_4_internals_of_calling_a_future.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 | struct Delay {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: enum `MainFuture` is never used
[INFO] [stderr]   --> examples/10_4_internals_of_calling_a_future.rs:33:6
[INFO] [stderr]    |
[INFO] [stderr] 33 | enum MainFuture {
[INFO] [stderr]    |      ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `receive_from_manager`
[INFO] [stderr]   --> src/bin/client.rs:93:28
[INFO] [stderr]    |
[INFO] [stderr] 93 |         let (send_to_task, receive_from_manager) = oneshot::channel();
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_receive_from_manager`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `response`
[INFO] [stderr]   --> src/bin/client.rs:50:21
[INFO] [stderr]    |
[INFO] [stderr] 50 |                     response
[INFO] [stderr]    |                     ^^^^^^^^ help: try ignoring the field: `response: _`
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio_official_tutorial_code_minis` (example "10_4_internals_of_calling_a_future") generated 2 warnings
[INFO] [stderr] warning: `tokio_official_tutorial_code_minis` (bin "client" test) generated 2 warnings (run `cargo fix --bin "client" -p tokio_official_tutorial_code_minis --tests` to apply 2 suggestions)
[INFO] [stderr] warning: unused variable: `tx1`
[INFO] [stderr]   --> examples/11_3_implementation_of_the_select_macro.rs:44:10
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let (tx1, rx1) = oneshot::channel();
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tx2`
[INFO] [stderr]   --> examples/11_3_implementation_of_the_select_macro.rs:45:10
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let (tx2, rx2) = oneshot::channel();
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx2`
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio_official_tutorial_code_minis` (example "11_3_implementation_of_the_select_macro") generated 2 warnings (run `cargo fix --example "11_3_implementation_of_the_select_macro" -p tokio_official_tutorial_code_minis` to apply 2 suggestions)
[INFO] [stderr] warning: unused import: `Duration`
[INFO] [stderr]   --> examples/10_8_implementing_waker_in_a_future.rs:10:17
[INFO] [stderr]    |
[INFO] [stderr] 10 | use std::time::{Duration, Instant};
[INFO] [stderr]    |                 ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Delay` is never constructed
[INFO] [stderr]   --> examples/10_8_implementing_waker_in_a_future.rs:13:8
[INFO] [stderr]    |
[INFO] [stderr] 13 | struct Delay {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio_official_tutorial_code_minis` (example "10_8_implementing_waker_in_a_future") generated 2 warnings (run `cargo fix --example "10_8_implementing_waker_in_a_future" -p tokio_official_tutorial_code_minis` to apply 1 suggestion)
[INFO] [stderr] warning: unused variable: `tx1`
[INFO] [stderr]  --> examples/11_11_looping_over_multiple_channels_with_select.rs:9:10
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let (tx1, mut rx1) = mpsc::channel(128);
[INFO] [stderr]   |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx1`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tx2`
[INFO] [stderr]   --> examples/11_11_looping_over_multiple_channels_with_select.rs:10:10
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let (tx2, mut rx2) = mpsc::channel(128);
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `tx3`
[INFO] [stderr]   --> examples/11_11_looping_over_multiple_channels_with_select.rs:11:10
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let (tx3, mut rx3) = mpsc::channel(128);
[INFO] [stderr]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_tx3`
[INFO] [stderr] 
[INFO] [stderr] warning: `tokio_official_tutorial_code_minis` (example "11_11_looping_over_multiple_channels_with_select") generated 3 warnings (run `cargo fix --example "11_11_looping_over_multiple_channels_with_select" -p tokio_official_tutorial_code_minis` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] [stderr]      Running unittests src/bin/client.rs (/opt/rustwide/target/debug/deps/client-bf5c6db328e2bc78)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/echo-client-copy.rs (/opt/rustwide/target/debug/deps/echo_client_copy-167a3a9898dc2521)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/echo-server-copy.rs (/opt/rustwide/target/debug/deps/echo_server_copy-e7c72f52d9fa247c)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/echo-server-manually-without-copy.rs (/opt/rustwide/target/debug/deps/echo_server_manually_without_copy-3aa91bc32bfcf66a)
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/main.rs (/opt/rustwide/target/debug/deps/main-a467aaa0060baa24)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/server.rs (/opt/rustwide/target/debug/deps/server-dd22fd5f742c8ad0)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "6406fcdb716defeb1fffcd9b9419b11c0e7bd6879a505716302c22e685498d31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6406fcdb716defeb1fffcd9b9419b11c0e7bd6879a505716302c22e685498d31", kill_on_drop: false }`
[INFO] [stdout] 6406fcdb716defeb1fffcd9b9419b11c0e7bd6879a505716302c22e685498d31
