[INFO] cloning repository https://github.com/joshua-cooper/async-rust-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/joshua-cooper/async-rust-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshua-cooper%2Fasync-rust-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshua-cooper%2Fasync-rust-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 646dde935375980e9418572593f42ce0c63fc8ad
[INFO] testing joshua-cooper/async-rust-example against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjoshua-cooper%2Fasync-rust-example" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/joshua-cooper/async-rust-example
[INFO] finished tweaking git repo https://github.com/joshua-cooper/async-rust-example
[INFO] tweaked toml for git repo https://github.com/joshua-cooper/async-rust-example written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/joshua-cooper/async-rust-example on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/joshua-cooper/async-rust-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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a550bc4a5ff5ceaa22bea5375b3efdf52d5f7a35689edc52f0dd2f2ab3c7029d
[INFO] running `Command { std: "docker" "start" "-a" "a550bc4a5ff5ceaa22bea5375b3efdf52d5f7a35689edc52f0dd2f2ab3c7029d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a550bc4a5ff5ceaa22bea5375b3efdf52d5f7a35689edc52f0dd2f2ab3c7029d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a550bc4a5ff5ceaa22bea5375b3efdf52d5f7a35689edc52f0dd2f2ab3c7029d", kill_on_drop: false }`
[INFO] [stdout] a550bc4a5ff5ceaa22bea5375b3efdf52d5f7a35689edc52f0dd2f2ab3c7029d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] af1e8b3f758c0e7886f6a21e2e2f663519a65699950e1f0327d1e63bc047a1db
[INFO] running `Command { std: "docker" "start" "-a" "af1e8b3f758c0e7886f6a21e2e2f663519a65699950e1f0327d1e63bc047a1db", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling futures-core v0.3.6
[INFO] [stderr]    Compiling pin-project-lite v0.1.10
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling cache-padded v1.1.1
[INFO] [stderr]    Compiling futures-io v0.3.6
[INFO] [stderr]    Compiling waker-fn v1.1.0
[INFO] [stderr]    Compiling fastrand v1.4.0
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling parking v2.0.0
[INFO] [stderr]    Compiling once_cell v1.4.1
[INFO] [stderr]    Compiling event-listener v2.5.1
[INFO] [stderr]    Compiling concurrent-queue v1.2.2
[INFO] [stderr]    Compiling async-task v4.0.2
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling vec-arena v1.0.0
[INFO] [stderr]    Compiling instant v0.1.7
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling smallvec v1.4.2
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling atomic-waker v1.0.0
[INFO] [stderr]    Compiling arc-swap v0.4.7
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling async-mutex v1.4.0
[INFO] [stderr]    Compiling bytes v0.5.6
[INFO] [stderr]    Compiling lock_api v0.4.1
[INFO] [stderr]    Compiling async-channel v1.5.1
[INFO] [stderr]    Compiling futures-lite v1.11.1
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling nb-connect v1.0.2
[INFO] [stderr]    Compiling polling v2.0.1
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.0
[INFO] [stderr]    Compiling signal-hook-registry v1.2.1
[INFO] [stderr]    Compiling mio v0.7.3
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling parking_lot v0.11.0
[INFO] [stderr]    Compiling async-executor v1.3.0
[INFO] [stderr]    Compiling async-io v1.1.10
[INFO] [stderr]    Compiling blocking v1.0.2
[INFO] [stderr]    Compiling async-global-executor v1.4.0
[INFO] [stderr]    Compiling async-attributes v1.1.1
[INFO] [stderr]    Compiling tokio-macros v0.3.0
[INFO] [stderr]    Compiling async-std v1.6.5
[INFO] [stderr]    Compiling tokio v0.3.0
[INFO] [stderr]    Compiling async-rust-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `to` is never read
[INFO] [stdout]  --> src/tokio.rs:9:24
[INFO] [stdout]   |
[INFO] [stdout] 9 |     SendWelcomeEmail { to: String },
[INFO] [stdout]   |     ----------------   ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` 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: field `id` is never read
[INFO] [stdout]   --> src/tokio.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |     DownloadVideo { id: usize },
[INFO] [stdout]    |     -------------   ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `to` is never read
[INFO] [stdout]  --> src/async-std.rs:7:24
[INFO] [stdout]   |
[INFO] [stdout] 7 |     SendWelcomeEmail { to: String },
[INFO] [stdout]   |     ----------------   ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` 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: field `id` is never read
[INFO] [stdout]  --> src/async-std.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 |     DownloadVideo { id: usize },
[INFO] [stdout]   |     -------------   ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.41s
[INFO] running `Command { std: "docker" "inspect" "af1e8b3f758c0e7886f6a21e2e2f663519a65699950e1f0327d1e63bc047a1db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af1e8b3f758c0e7886f6a21e2e2f663519a65699950e1f0327d1e63bc047a1db", kill_on_drop: false }`
[INFO] [stdout] af1e8b3f758c0e7886f6a21e2e2f663519a65699950e1f0327d1e63bc047a1db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0820712dbb6a36efa0acc04f61707bd9f27f377a172b38dcc19ca2521cbe9b4d
[INFO] running `Command { std: "docker" "start" "-a" "0820712dbb6a36efa0acc04f61707bd9f27f377a172b38dcc19ca2521cbe9b4d", kill_on_drop: false }`
[INFO] [stderr]    Compiling async-rust-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `to` is never read
[INFO] [stdout]  --> src/tokio.rs:9:24
[INFO] [stdout]   |
[INFO] [stdout] 9 |     SendWelcomeEmail { to: String },
[INFO] [stdout]   |     ----------------   ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` 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: field `id` is never read
[INFO] [stdout]   --> src/tokio.rs:10:21
[INFO] [stdout]    |
[INFO] [stdout] 10 |     DownloadVideo { id: usize },
[INFO] [stdout]    |     -------------   ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `to` is never read
[INFO] [stdout]  --> src/async-std.rs:7:24
[INFO] [stdout]   |
[INFO] [stdout] 7 |     SendWelcomeEmail { to: String },
[INFO] [stdout]   |     ----------------   ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` 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: field `id` is never read
[INFO] [stdout]  --> src/async-std.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 |     DownloadVideo { id: usize },
[INFO] [stdout]   |     -------------   ^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "0820712dbb6a36efa0acc04f61707bd9f27f377a172b38dcc19ca2521cbe9b4d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0820712dbb6a36efa0acc04f61707bd9f27f377a172b38dcc19ca2521cbe9b4d", kill_on_drop: false }`
[INFO] [stdout] 0820712dbb6a36efa0acc04f61707bd9f27f377a172b38dcc19ca2521cbe9b4d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b8d74975b3f944134ea1709db5f4790ffe0e8890f66436bb08063d23633ed931
[INFO] running `Command { std: "docker" "start" "-a" "b8d74975b3f944134ea1709db5f4790ffe0e8890f66436bb08063d23633ed931", kill_on_drop: false }`
[INFO] [stderr] warning: field `to` is never read
[INFO] [stderr]  --> src/tokio.rs:9:24
[INFO] [stderr]   |
[INFO] [stderr] 9 |     SendWelcomeEmail { to: String },
[INFO] [stderr]   |     ----------------   ^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     field in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `id` is never read
[INFO] [stderr]   --> src/tokio.rs:10:21
[INFO] [stderr]    |
[INFO] [stderr] 10 |     DownloadVideo { id: usize },
[INFO] [stderr]    |     -------------   ^^
[INFO] [stderr]    |     |
[INFO] [stderr]    |     field in this variant
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `to` is never read
[INFO] [stderr]  --> src/async-std.rs:7:24
[INFO] [stderr]   |
[INFO] [stderr] 7 |     SendWelcomeEmail { to: String },
[INFO] [stderr]   |     ----------------   ^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     field in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `id` is never read
[INFO] [stderr]  --> src/async-std.rs:8:21
[INFO] [stderr]   |
[INFO] [stderr] 8 |     DownloadVideo { id: usize },
[INFO] [stderr]   |     -------------   ^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     field in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `async-rust-example` (bin "tokio" test) generated 2 warnings
[INFO] [stderr] warning: `async-rust-example` (bin "async-std" test) generated 2 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/async-std.rs (/opt/rustwide/target/debug/deps/async_std-7dbdd573b728ab49)
[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/tokio.rs (/opt/rustwide/target/debug/deps/tokio-b9c59f4aa8a140f8)
[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" "b8d74975b3f944134ea1709db5f4790ffe0e8890f66436bb08063d23633ed931", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8d74975b3f944134ea1709db5f4790ffe0e8890f66436bb08063d23633ed931", kill_on_drop: false }`
[INFO] [stdout] b8d74975b3f944134ea1709db5f4790ffe0e8890f66436bb08063d23633ed931
