[INFO] fetching crate piper 0.1.3...
[INFO] testing piper-0.1.3 against 1.47.0 for beta-1.48-1
[INFO] extracting crate piper 0.1.3 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate piper 0.1.3 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate piper 0.1.3
[INFO] finished tweaking crates.io crate piper 0.1.3
[INFO] tweaked toml for crates.io crate piper 0.1.3 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate piper 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 12e8459f88d634b4f24fa8a207903afb7817b356c7e0433a9a7c24836ef22c44
[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" "12e8459f88d634b4f24fa8a207903afb7817b356c7e0433a9a7c24836ef22c44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12e8459f88d634b4f24fa8a207903afb7817b356c7e0433a9a7c24836ef22c44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12e8459f88d634b4f24fa8a207903afb7817b356c7e0433a9a7c24836ef22c44", kill_on_drop: false }`
[INFO] [stdout] 12e8459f88d634b4f24fa8a207903afb7817b356c7e0433a9a7c24836ef22c44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5e8a57474c74ca298911569d7eeb9bc46b99052ba7471db47de90b77d37edf01
[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" "5e8a57474c74ca298911569d7eeb9bc46b99052ba7471db47de90b77d37edf01", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.13
[INFO] [stderr]    Compiling syn v1.0.22
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling futures-sink v0.3.5
[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling quote v1.0.5
[INFO] [stderr]    Compiling pin-project-internal v0.4.16
[INFO] [stderr]    Compiling pin-project v0.4.16
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling piper v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type does not implement `std::fmt::Debug`; consider adding `#[derive(Debug)]` or a manual implementation
[INFO] [stdout]   --> src/event.rs:66:1
[INFO] [stdout]    |
[INFO] [stdout] 66 | / pub struct Event {
[INFO] [stdout] 67 | |     /// A pointer to heap-allocated inner state.
[INFO] [stdout] 68 | |     ///
[INFO] [stdout] 69 | |     /// This pointer is initially null and gets lazily initialized on first use. Semantically, it
[INFO] [stdout] ...  |
[INFO] [stdout] 72 | |     inner: AtomicPtr<Inner>,
[INFO] [stdout] 73 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type does not implement `std::fmt::Debug`; consider adding `#[derive(Debug)]` or a manual implementation
[INFO] [stdout]    --> src/event.rs:201:1
[INFO] [stdout]     |
[INFO] [stdout] 201 | / pub struct EventListener {
[INFO] [stdout] 202 | |     /// A reference to [`Event`]'s inner state.
[INFO] [stdout] 203 | |     inner: Arc<Inner>,
[INFO] [stdout] 204 | |
[INFO] [stdout] 205 | |     /// A pointer to this listener's entry in the linked list.
[INFO] [stdout] 206 | |     entry: Option<NonNull<Entry>>,
[INFO] [stdout] 207 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.49s
[INFO] running `Command { std: "docker" "inspect" "5e8a57474c74ca298911569d7eeb9bc46b99052ba7471db47de90b77d37edf01", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e8a57474c74ca298911569d7eeb9bc46b99052ba7471db47de90b77d37edf01", kill_on_drop: false }`
[INFO] [stdout] 5e8a57474c74ca298911569d7eeb9bc46b99052ba7471db47de90b77d37edf01
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 385e572912db75d225389b500f4c66376707b6d1160b2316572201c3381a973a
[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" "385e572912db75d225389b500f4c66376707b6d1160b2316572201c3381a973a", kill_on_drop: false }`
[INFO] [stdout] warning: type does not implement `std::fmt::Debug`; consider adding `#[derive(Debug)]` or a manual implementation
[INFO] [stdout]   --> src/event.rs:66:1
[INFO] [stdout]    |
[INFO] [stdout] 66 | / pub struct Event {
[INFO] [stdout] 67 | |     /// A pointer to heap-allocated inner state.
[INFO] [stdout] 68 | |     ///
[INFO] [stdout] 69 | |     /// This pointer is initially null and gets lazily initialized on first use. Semantically, it
[INFO] [stdout] ...  |
[INFO] [stdout] 72 | |     inner: AtomicPtr<Inner>,
[INFO] [stdout] 73 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type does not implement `std::fmt::Debug`; consider adding `#[derive(Debug)]` or a manual implementation
[INFO] [stdout]    --> src/event.rs:201:1
[INFO] [stdout]     |
[INFO] [stdout] 201 | / pub struct EventListener {
[INFO] [stdout] 202 | |     /// A reference to [`Event`]'s inner state.
[INFO] [stdout] 203 | |     inner: Arc<Inner>,
[INFO] [stdout] 204 | |
[INFO] [stdout] 205 | |     /// A pointer to this listener's entry in the linked list.
[INFO] [stdout] 206 | |     entry: Option<NonNull<Entry>>,
[INFO] [stdout] 207 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling piper v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0433]: failed to resolve: use of undeclared type or module `smol`
[INFO] [stdout]  --> examples/foo.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     smol::run(async {
[INFO] [stdout]   |     ^^^^ use of undeclared type or module `smol`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `piper`.
[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: type does not implement `std::fmt::Debug`; consider adding `#[derive(Debug)]` or a manual implementation
[INFO] [stdout]   --> src/event.rs:66:1
[INFO] [stdout]    |
[INFO] [stdout] 66 | / pub struct Event {
[INFO] [stdout] 67 | |     /// A pointer to heap-allocated inner state.
[INFO] [stdout] 68 | |     ///
[INFO] [stdout] 69 | |     /// This pointer is initially null and gets lazily initialized on first use. Semantically, it
[INFO] [stdout] ...  |
[INFO] [stdout] 72 | |     inner: AtomicPtr<Inner>,
[INFO] [stdout] 73 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 12 | #![warn(missing_docs, missing_debug_implementations, rust_2018_idioms)]
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type does not implement `std::fmt::Debug`; consider adding `#[derive(Debug)]` or a manual implementation
[INFO] [stdout]    --> src/event.rs:201:1
[INFO] [stdout]     |
[INFO] [stdout] 201 | / pub struct EventListener {
[INFO] [stdout] 202 | |     /// A reference to [`Event`]'s inner state.
[INFO] [stdout] 203 | |     inner: Arc<Inner>,
[INFO] [stdout] 204 | |
[INFO] [stdout] 205 | |     /// A pointer to this listener's entry in the linked list.
[INFO] [stdout] 206 | |     entry: Option<NonNull<Entry>>,
[INFO] [stdout] 207 | | }
[INFO] [stdout]     | |_^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "385e572912db75d225389b500f4c66376707b6d1160b2316572201c3381a973a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "385e572912db75d225389b500f4c66376707b6d1160b2316572201c3381a973a", kill_on_drop: false }`
[INFO] [stdout] 385e572912db75d225389b500f4c66376707b6d1160b2316572201c3381a973a
