[INFO] fetching crate zkmq 0.2.7...
[INFO] checking zkmq-0.2.7 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate zkmq 0.2.7 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate zkmq 0.2.7 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zkmq 0.2.7
[INFO] finished tweaking crates.io crate zkmq 0.2.7
[INFO] tweaked toml for crates.io crate zkmq 0.2.7 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate zkmq 0.2.7 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zookeeper_derive v0.4.1
[INFO] [stderr]   Downloaded snowflake v1.3.0
[INFO] [stderr]   Downloaded zookeeper v0.6.0
[INFO] [stderr]   Downloaded serde_derive v1.0.127
[INFO] [stderr]   Downloaded serde v1.0.127
[INFO] [stderr]   Downloaded serde_json v1.0.66
[INFO] [stderr]   Downloaded syn v1.0.75
[INFO] [stderr]   Downloaded libc v0.2.100
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5cb5c2859ce5180a73d38526f1bb6482e8818a849b04bb42dae3b2f068cfd2f5
[INFO] running `Command { std: "docker" "start" "-a" "5cb5c2859ce5180a73d38526f1bb6482e8818a849b04bb42dae3b2f068cfd2f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5cb5c2859ce5180a73d38526f1bb6482e8818a849b04bb42dae3b2f068cfd2f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cb5c2859ce5180a73d38526f1bb6482e8818a849b04bb42dae3b2f068cfd2f5", kill_on_drop: false }`
[INFO] [stdout] 5cb5c2859ce5180a73d38526f1bb6482e8818a849b04bb42dae3b2f068cfd2f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a015c8003c0d07cd04db7f63b7281bf2cd2592c6c845c0d00999d3f0ea06f265
[INFO] running `Command { std: "docker" "start" "-a" "a015c8003c0d07cd04db7f63b7281bf2cd2592c6c845c0d00999d3f0ea06f265", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking slab v0.4.4
[INFO] [stderr]    Compiling anyhow v1.0.43
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]     Checking lazycell v1.3.0
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking env_logger v0.9.0
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking lru v0.6.6
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]    Compiling zookeeper_derive v0.4.1
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]     Checking zookeeper v0.6.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking zkmq v0.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `zkmq` is imported redundantly
[INFO] [stdout]  --> examples/producer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use zkmq;
[INFO] [stdout]   |     ^^^^ the item `zkmq` 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 `zkmq` is imported redundantly
[INFO] [stdout]  --> examples/consumer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use zkmq;
[INFO] [stdout]   |     ^^^^ the item `zkmq` 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 `zkmq` is imported redundantly
[INFO] [stdout]  --> examples/filtered_consumer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use zkmq;
[INFO] [stdout]   |     ^^^^ the item `zkmq` 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 `zookeeper` is imported redundantly
[INFO] [stdout]  --> examples/filtered_consumer.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use zookeeper;
[INFO] [stdout]   |     ^^^^^^^^^ the item `zookeeper` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `zookeeper` is imported redundantly
[INFO] [stdout]  --> examples/consumer.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use zookeeper;
[INFO] [stdout]   |     ^^^^^^^^^ the item `zookeeper` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `zkmq` is imported redundantly
[INFO] [stdout]  --> examples/filtered_producer.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use zkmq;
[INFO] [stdout]   |     ^^^^ the item `zkmq` 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 `anyhow` is imported redundantly
[INFO] [stdout]  --> examples/filtered_consumer.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow;
[INFO] [stdout]   |     ^^^^^^ the item `anyhow` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `anyhow` is imported redundantly
[INFO] [stdout]  --> examples/consumer.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow;
[INFO] [stdout]   |     ^^^^^^ the item `anyhow` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `zookeeper` is imported redundantly
[INFO] [stdout]  --> examples/producer.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use zookeeper;
[INFO] [stdout]   |     ^^^^^^^^^ the item `zookeeper` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `zookeeper` is imported redundantly
[INFO] [stdout]  --> examples/filtered_producer.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use zookeeper;
[INFO] [stdout]   |     ^^^^^^^^^ the item `zookeeper` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `anyhow` is imported redundantly
[INFO] [stdout]  --> examples/filtered_producer.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow;
[INFO] [stdout]   |     ^^^^^^ the item `anyhow` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `anyhow` is imported redundantly
[INFO] [stdout]  --> examples/producer.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use anyhow;
[INFO] [stdout]   |     ^^^^^^ the item `anyhow` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.43s
[INFO] running `Command { std: "docker" "inspect" "a015c8003c0d07cd04db7f63b7281bf2cd2592c6c845c0d00999d3f0ea06f265", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a015c8003c0d07cd04db7f63b7281bf2cd2592c6c845c0d00999d3f0ea06f265", kill_on_drop: false }`
[INFO] [stdout] a015c8003c0d07cd04db7f63b7281bf2cd2592c6c845c0d00999d3f0ea06f265