[INFO] crate ak 0.1.1 is already in cache
[INFO] testing ak-0.1.1 against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] extracting crate ak 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate ak 0.1.1 on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ak 0.1.1
[INFO] finished tweaking crates.io crate ak 0.1.1
[INFO] tweaked toml for crates.io crate ak 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate ak 0.1.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dcc55e4e34a2ddfd0a819e89272e15b8b21b9de69270ab2060b6895d527b0472
[INFO] running `Command { std: "docker" "start" "-a" "dcc55e4e34a2ddfd0a819e89272e15b8b21b9de69270ab2060b6895d527b0472", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dcc55e4e34a2ddfd0a819e89272e15b8b21b9de69270ab2060b6895d527b0472", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcc55e4e34a2ddfd0a819e89272e15b8b21b9de69270ab2060b6895d527b0472", kill_on_drop: false }`
[INFO] [stdout] dcc55e4e34a2ddfd0a819e89272e15b8b21b9de69270ab2060b6895d527b0472
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9ed67419b1eb90e2e24e0f0baba74abf4394eb9a3c813098fbbbeeb3f1f1e99
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a9ed67419b1eb90e2e24e0f0baba74abf4394eb9a3c813098fbbbeeb3f1f1e99", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.5
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling futures-sink-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling futures-io-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling ak-rt v0.1.0
[INFO] [stderr]    Compiling futures-channel-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling proc-macro-hack v0.5.10
[INFO] [stderr]    Compiling async-trait v0.1.13
[INFO] [stderr]    Compiling ak-codegen v0.1.0
[INFO] [stderr]    Compiling futures-join-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling tokio v0.2.0-alpha.6
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling ak v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/context.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         tx.send(fut.await);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.43s
[INFO] running `Command { std: "docker" "inspect" "a9ed67419b1eb90e2e24e0f0baba74abf4394eb9a3c813098fbbbeeb3f1f1e99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9ed67419b1eb90e2e24e0f0baba74abf4394eb9a3c813098fbbbeeb3f1f1e99", kill_on_drop: false }`
[INFO] [stdout] a9ed67419b1eb90e2e24e0f0baba74abf4394eb9a3c813098fbbbeeb3f1f1e99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:38e1b949b06cde1964af550a6e548bd9b2b2ea170003ae122f8fc0886596cc07" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e5652739ced48887d0712657dc1d29a72e4a4dfbdd0b9c49125b81cd88bf0d49
[INFO] running `Command { std: "docker" "start" "-a" "e5652739ced48887d0712657dc1d29a72e4a4dfbdd0b9c49125b81cd88bf0d49", kill_on_drop: false }`
[INFO] [stderr]    Compiling ak v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/context.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         tx.send(fut.await);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: custom attribute panicked
[INFO] [stdout]   --> examples/basic.rs:39:5
[INFO] [stdout]    |
[INFO] [stdout] 39 |     #[ak::suspend]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: message: method : fn handle(mut self : ContextRef < Self >, msg : Payload) -> Self :: Future
[INFO] [stdout]            {
[INFO] [stdout]                async move
[INFO] [stdout]                {
[INFO] [stdout]                    if msg . 0 >= self . limit
[INFO] [stdout]                    {
[INFO] [stdout]                        println !
[INFO] [stdout]                        ("Reached limit of {} (payload was {})", self . limit, msg . 0) ;
[INFO] [stdout]                        self . stop() ; return ;
[INFO] [stdout]                    }
[INFO] [stdout]                    {
[INFO] [stdout]                        let _fut = self . next . send(Payload(msg . 0 + 1)) ;
[INFO] [stdout]                        let(mut _tmp, _res) = self . suspend(_fut) . await ; self = _tmp ;
[INFO] [stdout]                        _res
[INFO] [stdout]                    } ;
[INFO] [stdout]                }
[INFO] [stdout]            }
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::future::FutureExt`
[INFO] [stdout]  --> examples/basic.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use futures::future::FutureExt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::future::LocalBoxFuture`
[INFO] [stdout]  --> examples/basic.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use futures::future::LocalBoxFuture;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ak::prelude::*`
[INFO] [stdout]  --> examples/basic.rs:9:16
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub(crate) use ak::prelude::*;
[INFO] [stdout]   |                ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ak::context::*`
[INFO] [stdout]   --> examples/basic.rs:11:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub(crate) use ak::context::*;
[INFO] [stdout]    |                ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ak::types::*`
[INFO] [stdout]   --> examples/basic.rs:12:16
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub(crate) use ak::types::*;
[INFO] [stdout]    |                ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `async_trait::async_trait`
[INFO] [stdout]   --> examples/basic.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use async_trait::async_trait;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]   --> examples/basic.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | use std::time::Duration;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Generator`
[INFO] [stdout]   --> examples/basic.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::ops::Generator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `futures::StreamExt`
[INFO] [stdout]   --> examples/basic.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 | use futures::StreamExt;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::sync::mpsc::Sender`
[INFO] [stdout]   --> examples/basic.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use std::sync::mpsc::Sender;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: could not find defining uses
[INFO] [stdout]   --> examples/basic.rs:37:19
[INFO] [stdout]    |
[INFO] [stdout] 37 |     type Future = impl Future<Output=()> + 'static;
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ak`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused `std::result::Result` that must be used
[INFO] [stdout]   --> src/context.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         tx.send(fut.await);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "e5652739ced48887d0712657dc1d29a72e4a4dfbdd0b9c49125b81cd88bf0d49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5652739ced48887d0712657dc1d29a72e4a4dfbdd0b9c49125b81cd88bf0d49", kill_on_drop: false }`
[INFO] [stdout] e5652739ced48887d0712657dc1d29a72e4a4dfbdd0b9c49125b81cd88bf0d49