[INFO] cloning repository https://github.com/amimoto/rust-experiments [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/amimoto/rust-experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famimoto%2Frust-experiments", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famimoto%2Frust-experiments'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] adda9f74767df32af73a8a1b48dd2eb27d3426fb [INFO] checking amimoto/rust-experiments against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Famimoto%2Frust-experiments" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/amimoto/rust-experiments on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/amimoto/rust-experiments [INFO] finished tweaking git repo https://github.com/amimoto/rust-experiments [INFO] tweaked toml for git repo https://github.com/amimoto/rust-experiments written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/amimoto/rust-experiments 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" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded smol v1.2.5 [INFO] [stderr] Downloaded polling v2.3.0 [INFO] [stderr] Downloaded async-net v1.7.0 [INFO] [stderr] Downloaded socket2 v0.4.6 [INFO] [stderr] Downloaded async-io v1.8.0 [INFO] [stderr] Downloaded async-process v1.5.0 [INFO] [stderr] Downloaded concurrent-queue v1.2.4 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 0011e77ccdc8fc3ce2b3a4b70c8cbdb93bfb5ef9d7f93c43eeac69f4597e6458 [INFO] running `Command { std: "docker" "start" "-a" "0011e77ccdc8fc3ce2b3a4b70c8cbdb93bfb5ef9d7f93c43eeac69f4597e6458", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "0011e77ccdc8fc3ce2b3a4b70c8cbdb93bfb5ef9d7f93c43eeac69f4597e6458", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0011e77ccdc8fc3ce2b3a4b70c8cbdb93bfb5ef9d7f93c43eeac69f4597e6458", kill_on_drop: false }` [INFO] [stdout] 0011e77ccdc8fc3ce2b3a4b70c8cbdb93bfb5ef9d7f93c43eeac69f4597e6458 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 2966c8457dee6400131689a349ad67957ca706ea79ac2003238c2e93dfcaa8e4 [INFO] running `Command { std: "docker" "start" "-a" "2966c8457dee6400131689a349ad67957ca706ea79ac2003238c2e93dfcaa8e4", kill_on_drop: false }` [INFO] [stderr] Compiling futures-core v0.3.24 [INFO] [stderr] Checking cache-padded v1.2.0 [INFO] [stderr] Checking parking v2.0.0 [INFO] [stderr] Checking waker-fn v1.1.0 [INFO] [stderr] Checking event-listener v2.5.3 [INFO] [stderr] Checking fastrand v1.8.0 [INFO] [stderr] Checking futures-io v0.3.24 [INFO] [stderr] Checking pin-project-lite v0.2.9 [INFO] [stderr] Compiling slab v0.4.7 [INFO] [stderr] Checking once_cell v1.13.1 [INFO] [stderr] Compiling polling v2.3.0 [INFO] [stderr] Compiling async-io v1.8.0 [INFO] [stderr] Checking async-task v4.3.0 [INFO] [stderr] Compiling syn v1.0.99 [INFO] [stderr] Checking socket2 v0.4.6 [INFO] [stderr] Compiling signal-hook v0.3.14 [INFO] [stderr] Checking atomic-waker v1.0.0 [INFO] [stderr] Checking concurrent-queue v1.2.4 [INFO] [stderr] Checking signal-hook-registry v1.4.0 [INFO] [stderr] Compiling async-net v1.7.0 [INFO] [stderr] Compiling async-fs v1.6.0 [INFO] [stderr] Compiling async-process v1.5.0 [INFO] [stderr] Compiling serde v1.0.144 [INFO] [stderr] Checking async-lock v2.5.0 [INFO] [stderr] Checking async-mutex v1.4.0 [INFO] [stderr] Checking bytes v1.2.1 [INFO] [stderr] Checking futures-lite v1.12.0 [INFO] [stderr] Checking async-channel v1.7.1 [INFO] [stderr] Checking blocking v1.2.0 [INFO] [stderr] Checking async-executor v1.4.1 [INFO] [stderr] Checking smol v1.2.5 [INFO] [stderr] Compiling serde_derive v1.0.144 [INFO] [stderr] Checking serde_json v1.0.85 [INFO] [stderr] Checking smol-wamp v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: the item `smol` is imported redundantly [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use smol; [INFO] [stdout] | ^^^^ the item `smol` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the item `smol` is imported redundantly [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use smol; [INFO] [stdout] | ^^^^ the item `smol` is already defined by prelude [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `message` [INFO] [stdout] --> src/client.rs:52:46 [INFO] [stdout] | [INFO] [stdout] 52 | pub async fn handle_challenge(&mut self, message:Value) { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `url` [INFO] [stdout] --> src/client.rs:134:30 [INFO] [stdout] | [INFO] [stdout] 134 | pub async fn call(&self, url:&str) { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_url` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `message` [INFO] [stdout] --> src/client.rs:52:46 [INFO] [stdout] | [INFO] [stdout] 52 | pub async fn handle_challenge(&mut self, message:Value) { [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_message` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `url` is never read [INFO] [stdout] --> src/client.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 14 | struct ConnectionInfo { [INFO] [stdout] | -------------- field in this struct [INFO] [stdout] 15 | url: String, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `tracker` is never read [INFO] [stdout] --> src/client.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 25 | pub struct Wamp { [INFO] [stdout] | ---- field in this struct [INFO] [stdout] ... [INFO] [stdout] 28 | tracker: Arc>, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Wamp` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/client/transport.rs:35:9 [INFO] [stdout] | [INFO] [stdout] 35 | self.stream.write(&message_length_buf.to_vec()).await; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 35 | let _ = self.stream.write(&message_length_buf.to_vec()).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/client/transport.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | self.stream.write(&buf).await; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 37 | let _ = self.stream.write(&buf).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/client/transport.rs:66:9 [INFO] [stdout] | [INFO] [stdout] 66 | self.stream.write(&HANDSHAKE).await; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 66 | let _ = self.stream.write(&HANDSHAKE).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `url` [INFO] [stdout] --> src/client.rs:134:30 [INFO] [stdout] | [INFO] [stdout] 134 | pub async fn call(&self, url:&str) { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_url` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `url` is never read [INFO] [stdout] --> src/client.rs:15:5 [INFO] [stdout] | [INFO] [stdout] 14 | struct ConnectionInfo { [INFO] [stdout] | -------------- field in this struct [INFO] [stdout] 15 | url: String, [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `tracker` is never read [INFO] [stdout] --> src/client.rs:28:5 [INFO] [stdout] | [INFO] [stdout] 25 | pub struct Wamp { [INFO] [stdout] | ---- field in this struct [INFO] [stdout] ... [INFO] [stdout] 28 | tracker: Arc>, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Wamp` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/client/transport.rs:35:9 [INFO] [stdout] | [INFO] [stdout] 35 | self.stream.write(&message_length_buf.to_vec()).await; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 35 | let _ = self.stream.write(&message_length_buf.to_vec()).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/client/transport.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | self.stream.write(&buf).await; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 37 | let _ = self.stream.write(&buf).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/client/transport.rs:66:9 [INFO] [stdout] | [INFO] [stdout] 66 | self.stream.write(&HANDSHAKE).await; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 66 | let _ = self.stream.write(&HANDSHAKE).await; [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.72s [INFO] running `Command { std: "docker" "inspect" "2966c8457dee6400131689a349ad67957ca706ea79ac2003238c2e93dfcaa8e4", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2966c8457dee6400131689a349ad67957ca706ea79ac2003238c2e93dfcaa8e4", kill_on_drop: false }` [INFO] [stdout] 2966c8457dee6400131689a349ad67957ca706ea79ac2003238c2e93dfcaa8e4