[INFO] fetching crate kafka 0.10.0...
[INFO] checking kafka-0.10.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate kafka 0.10.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate kafka 0.10.0 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 kafka 0.10.0
[INFO] finished tweaking crates.io crate kafka 0.10.0
[INFO] tweaked toml for crates.io crate kafka 0.10.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate kafka 0.10.0 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 ref_slice v1.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 364f4152eba962f8625a2b30137c769714fc818be0db3d59124e8c825ce41512
[INFO] running `Command { std: "docker" "start" "-a" "364f4152eba962f8625a2b30137c769714fc818be0db3d59124e8c825ce41512", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "364f4152eba962f8625a2b30137c769714fc818be0db3d59124e8c825ce41512", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "364f4152eba962f8625a2b30137c769714fc818be0db3d59124e8c825ce41512", kill_on_drop: false }`
[INFO] [stdout] 364f4152eba962f8625a2b30137c769714fc818be0db3d59124e8c825ce41512
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 3772c1bee137db741e3a69b0483c2402bcce252528006a3e4812bec0305eb2fe
[INFO] running `Command { std: "docker" "start" "-a" "3772c1bee137db741e3a69b0483c2402bcce252528006a3e4812bec0305eb2fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.67
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling snap v1.1.0
[INFO] [stderr]    Compiling openssl v0.10.57
[INFO] [stderr]    Compiling thiserror v1.0.48
[INFO] [stderr]     Checking crc-catalog v2.2.0
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]    Compiling kafka v0.10.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]     Checking thread_local v1.1.7
[INFO] [stderr]     Checking sharded-slab v0.1.4
[INFO] [stderr]     Checking flate2 v1.0.27
[INFO] [stderr]     Checking ref_slice v1.2.1
[INFO] [stderr]     Checking deranged v0.3.8
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking crc v3.0.1
[INFO] [stderr]     Checking tracing-log v0.1.3
[INFO] [stderr]     Checking tracing-subscriber v0.3.17
[INFO] [stderr]     Checking time v0.3.29
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling syn v2.0.37
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling openssl-sys v0.9.93
[INFO] [stderr]     Checking twox-hash v1.6.3
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling tracing-attributes v0.1.26
[INFO] [stderr]    Compiling thiserror-impl v1.0.48
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/client/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std;
[INFO] [stdout]   |     ^^^ the item `std` 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 `Iterator` is imported redundantly
[INFO] [stdout]   --> src/client/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::iter::Iterator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]  --> src/client/state.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::AsRef;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `AsRef` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/codecs.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `snap` is imported redundantly
[INFO] [stdout]   --> src/compression/snappy.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use snap;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | extern crate snap;
[INFO] [stdout]    | ------------------ the item `snap` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/protocol/offset.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/client/mod.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std;
[INFO] [stdout]   |     ^^^ the item `std` 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 `Iterator` is imported redundantly
[INFO] [stdout]   --> src/client/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::iter::Iterator;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]    |
[INFO] [stdout]    = note: the item `Iterator` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `AsRef` is imported redundantly
[INFO] [stdout]  --> src/client/state.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::convert::AsRef;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `AsRef` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/codecs.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:144:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `snap` is imported redundantly
[INFO] [stdout]   --> src/compression/snappy.rs:4:5
[INFO] [stdout]    |
[INFO] [stdout] 4  | use snap;
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:19:1
[INFO] [stdout]    |
[INFO] [stdout] 19 | extern crate snap;
[INFO] [stdout]    | ------------------ the item `snap` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `std` is imported redundantly
[INFO] [stdout]  --> src/protocol/offset.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std;
[INFO] [stdout]   |     ^^^ the item `std` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/consumer/mod.rs:255:25
[INFO] [stdout]     |
[INFO] [stdout] 255 |                     let mut fetch_state = self
[INFO] [stdout]     |                         ----^^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/consumer/mod.rs:255:25
[INFO] [stdout]     |
[INFO] [stdout] 255 |                     let mut fetch_state = self
[INFO] [stdout]     |                         ----^^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `tracing_subscriber` is imported redundantly
[INFO] [stdout]   --> examples/console-consumer.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use tracing_subscriber;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^ the item `tracing_subscriber` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `timefmt` is never read
[INFO] [stdout]    --> examples/offset-monitor.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 158 | struct Printer<W> {
[INFO] [stdout]     |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 161 |     timefmt: String,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.13s
[INFO] running `Command { std: "docker" "inspect" "3772c1bee137db741e3a69b0483c2402bcce252528006a3e4812bec0305eb2fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3772c1bee137db741e3a69b0483c2402bcce252528006a3e4812bec0305eb2fe", kill_on_drop: false }`
[INFO] [stdout] 3772c1bee137db741e3a69b0483c2402bcce252528006a3e4812bec0305eb2fe