[INFO] fetching crate ringbuf 0.4.8...
[INFO] checking ringbuf-0.4.8 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate ringbuf 0.4.8 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate ringbuf 0.4.8
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate ringbuf 0.4.8
[INFO] tweaked toml for crates.io crate ringbuf 0.4.8 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ringbuf 0.4.8 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate ringbuf 0.4.8 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lock-free-static v0.2.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f6dbf03fa826360e7e844a49bcc393c874ee8830c6dd3780f7a6e34a8fb72f43
[INFO] running `Command { std: "docker" "start" "-a" "f6dbf03fa826360e7e844a49bcc393c874ee8830c6dd3780f7a6e34a8fb72f43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f6dbf03fa826360e7e844a49bcc393c874ee8830c6dd3780f7a6e34a8fb72f43", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6dbf03fa826360e7e844a49bcc393c874ee8830c6dd3780f7a6e34a8fb72f43", kill_on_drop: false }`
[INFO] [stdout] f6dbf03fa826360e7e844a49bcc393c874ee8830c6dd3780f7a6e34a8fb72f43
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4aca72411e518568f89bab019abede95f4ed5abaf247841a7e586dfdb90301f3
[INFO] running `Command { std: "docker" "start" "-a" "4aca72411e518568f89bab019abede95f4ed5abaf247841a7e586dfdb90301f3", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]     Checking lock-free-static v0.2.1
[INFO] [stderr]     Checking ringbuf v0.4.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/traits/consumer.rs:188:17
[INFO] [stdout]     |
[INFO] [stdout] 188 |     fn pop_iter(&mut self) -> PopIter<Self> {
[INFO] [stdout]     |                 ^^^^^^^^^     ------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 188 |     fn pop_iter(&mut self) -> PopIter<'_, Self> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/traits/consumer.rs:188:17
[INFO] [stdout]     |
[INFO] [stdout] 188 |     fn pop_iter(&mut self) -> PopIter<Self> {
[INFO] [stdout]     |                 ^^^^^^^^^     ------------- the lifetime gets resolved as `'_`
[INFO] [stdout]     |                 |
[INFO] [stdout]     |                 this lifetime flows to the output
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]     |
[INFO] [stdout] 188 |     fn pop_iter(&mut self) -> PopIter<'_, Self> {
[INFO] [stdout]     |                                       +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.94s
[INFO] running `Command { std: "docker" "inspect" "4aca72411e518568f89bab019abede95f4ed5abaf247841a7e586dfdb90301f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4aca72411e518568f89bab019abede95f4ed5abaf247841a7e586dfdb90301f3", kill_on_drop: false }`
[INFO] [stdout] 4aca72411e518568f89bab019abede95f4ed5abaf247841a7e586dfdb90301f3