[INFO] fetching crate dataset-writer 1.1.1...
[INFO] checking dataset-writer-1.1.1 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate dataset-writer 1.1.1 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate dataset-writer 1.1.1
[INFO] finished tweaking crates.io crate dataset-writer 1.1.1
[INFO] tweaked toml for crates.io crate dataset-writer 1.1.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dataset-writer 1.1.1 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
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[INFO] [stderr]      Locking 143 packages to latest compatible versions
[INFO] [stderr]       Adding arrow v53.4.1 (available: v55.2.0)
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[INFO] [stderr]       Adding zstd-safe v7.2.1 (available: v7.2.4)
[INFO] [stderr]       Adding zstd-sys v2.0.13+zstd.1.5.6 (available: v2.0.15+zstd.1.5.7)
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded arrow-csv v53.4.1
[INFO] [stderr]   Downloaded arrow-ipc v53.4.1
[INFO] [stderr]   Downloaded parquet v53.4.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 086d0e1a50d081d669adae3569a34fb37c8f9c3746a46e6df0e39b0df2fca7c9
[INFO] running `Command { std: "docker" "start" "-a" "086d0e1a50d081d669adae3569a34fb37c8f9c3746a46e6df0e39b0df2fca7c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "086d0e1a50d081d669adae3569a34fb37c8f9c3746a46e6df0e39b0df2fca7c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "086d0e1a50d081d669adae3569a34fb37c8f9c3746a46e6df0e39b0df2fca7c9", kill_on_drop: false }`
[INFO] [stdout] 086d0e1a50d081d669adae3569a34fb37c8f9c3746a46e6df0e39b0df2fca7c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 2782fc3607567b5b9afba948ba07444e674e5ec4a9e266d17fa9dda301f23466
[INFO] running `Command { std: "docker" "start" "-a" "2782fc3607567b5b9afba948ba07444e674e5ec4a9e266d17fa9dda301f23466", kill_on_drop: false }`
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[INFO] [stderr]     Checking dataset-writer v1.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:102:30
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn get_thread_writer(&self) -> Result<RefMut<W>> {
[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] 102 |     pub fn get_thread_writer(&self) -> Result<RefMut<'_, W>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]    --> src/lib.rs:102:30
[INFO] [stdout]     |
[INFO] [stdout] 102 |     pub fn get_thread_writer(&self) -> Result<RefMut<W>> {
[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] 102 |     pub fn get_thread_writer(&self) -> Result<RefMut<'_, W>> {
[INFO] [stdout]     |                                                      +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 31.59s
[INFO] running `Command { std: "docker" "inspect" "2782fc3607567b5b9afba948ba07444e674e5ec4a9e266d17fa9dda301f23466", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2782fc3607567b5b9afba948ba07444e674e5ec4a9e266d17fa9dda301f23466", kill_on_drop: false }`
[INFO] [stdout] 2782fc3607567b5b9afba948ba07444e674e5ec4a9e266d17fa9dda301f23466