[INFO] cloning repository https://github.com/paper-lark/group
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/paper-lark/group" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaper-lark%2Fgroup", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaper-lark%2Fgroup'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5d7a7a8e40c04c83b8945dac6e8da5eea0bcad27
[INFO] testing paper-lark/group against beta-2026-03-05 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaper-lark%2Fgroup" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/paper-lark/group
[INFO] finished tweaking git repo https://github.com/paper-lark/group
[INFO] tweaked toml for git repo https://github.com/paper-lark/group written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/paper-lark/group on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/paper-lark/group 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" "+beta-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing paper-lark/group against beta-2026-03-05 for beta-1.95-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpaper-lark%2Fgroup" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/paper-lark/group
[INFO] finished tweaking git repo https://github.com/paper-lark/group
[INFO] tweaked toml for git repo https://github.com/paper-lark/group written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/paper-lark/group on toolchain beta-2026-03-05
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/paper-lark/group 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" "+beta-2026-03-05" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossterm_winapi v0.8.0
[INFO] [stderr]   Downloaded serde_yaml v0.8.23
[INFO] [stderr]   Downloaded string-error v0.1.0
[INFO] [stderr]   Downloaded signal-hook-mio v0.2.1
[INFO] [stderr]   Downloaded crossterm_winapi v0.9.0
[INFO] [stderr]   Downloaded signal-hook v0.3.13
[INFO] [stderr]   Downloaded serde_derive v1.0.132
[INFO] [stderr]   Downloaded serde v1.0.132
[INFO] [stderr]   Downloaded crossterm v0.22.1
[INFO] [stderr]   Downloaded tui v0.16.0
[INFO] [stderr]   Downloaded crossterm v0.20.0
[INFO] [stderr]   Downloaded serde_json v1.0.73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 781c979693e5447a87688d94d000a97cbd6998a66e51f5770806a20bc8b04ab5
[INFO] running `Command { std: "docker" "start" "-a" "781c979693e5447a87688d94d000a97cbd6998a66e51f5770806a20bc8b04ab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "781c979693e5447a87688d94d000a97cbd6998a66e51f5770806a20bc8b04ab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "781c979693e5447a87688d94d000a97cbd6998a66e51f5770806a20bc8b04ab5", kill_on_drop: false }`
[INFO] [stdout] 781c979693e5447a87688d94d000a97cbd6998a66e51f5770806a20bc8b04ab5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c5c709c51e4d6107ff47c2b6ca50abac02b2ac8551fecd1da81feaf5ceafb57
[INFO] running `Command { std: "docker" "start" "-a" "3c5c709c51e4d6107ff47c2b6ca50abac02b2ac8551fecd1da81feaf5ceafb57", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling signal-hook v0.3.13
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling smallvec v1.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.132
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling serde v1.0.132
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling linked-hash-map v0.5.4
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling ryu v1.0.9
[INFO] [stderr]    Compiling serde_json v1.0.73
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling string-error v0.1.0
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling signal-hook-registry v1.4.0
[INFO] [stderr]    Compiling mio v0.7.14
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling signal-hook-mio v0.2.1
[INFO] [stderr]    Compiling crossterm v0.20.0
[INFO] [stderr]    Compiling crossterm v0.22.1
[INFO] [stderr]    Compiling tui v0.16.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]    Compiling structopt v0.3.25
[INFO] [stderr]    Compiling serde_yaml v0.8.23
[INFO] [stderr]    Compiling group v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `row` is never used
[INFO] [stdout]   --> src/io/dataframe.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub trait DataFrame {
[INFO] [stdout]    |           --------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn row(&self, index: usize) -> Vec<ColumnValue>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/io/dataframe.rs:124:19
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn filter(&self, column_filters: &HashMap<String, ColumnValue>) -> DataFrameFilterView {
[INFO] [stdout]     |                   ^^^^^ the lifetime is elided here                        ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn filter(&self, column_filters: &HashMap<String, ColumnValue>) -> DataFrameFilterView<'_> {
[INFO] [stdout]     |                                                                                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/io/dataframe.rs:141:90
[INFO] [stdout]     |
[INFO] [stdout] 141 |     pub fn group_by<'a>(&'a self, columns: &'a [String], extra_columns: &'a [String]) -> DataFrameGroupView {
[INFO] [stdout]     |                          --                 --                           --              ^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                          |                  |                            |
[INFO] [stdout]     |                          |                  |                            the lifetime is named here
[INFO] [stdout]     |                          |                  the lifetime is named here
[INFO] [stdout]     |                          the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 141 |     pub fn group_by<'a>(&'a self, columns: &'a [String], extra_columns: &'a [String]) -> DataFrameGroupView<'a> {
[INFO] [stdout]     |                                                                                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.06s
[INFO] running `Command { std: "docker" "inspect" "3c5c709c51e4d6107ff47c2b6ca50abac02b2ac8551fecd1da81feaf5ceafb57", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c5c709c51e4d6107ff47c2b6ca50abac02b2ac8551fecd1da81feaf5ceafb57", kill_on_drop: false }`
[INFO] [stdout] 3c5c709c51e4d6107ff47c2b6ca50abac02b2ac8551fecd1da81feaf5ceafb57
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e0ad637e902c4d70d4bb3f6f26a2597040a3029a4a6db6d5f050a258dafbaba
[INFO] running `Command { std: "docker" "start" "-a" "3e0ad637e902c4d70d4bb3f6f26a2597040a3029a4a6db6d5f050a258dafbaba", kill_on_drop: false }`
[INFO] [stderr]    Compiling group v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `row` is never used
[INFO] [stdout]   --> src/io/dataframe.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub trait DataFrame {
[INFO] [stdout]    |           --------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 58 |     fn row(&self, index: usize) -> Vec<ColumnValue>;
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]    --> src/io/dataframe.rs:124:19
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn filter(&self, column_filters: &HashMap<String, ColumnValue>) -> DataFrameFilterView {
[INFO] [stdout]     |                   ^^^^^ the lifetime is elided here                        ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]     |
[INFO] [stdout] 124 |     pub fn filter(&self, column_filters: &HashMap<String, ColumnValue>) -> DataFrameFilterView<'_> {
[INFO] [stdout]     |                                                                                               ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stdout]    --> src/io/dataframe.rs:141:90
[INFO] [stdout]     |
[INFO] [stdout] 141 |     pub fn group_by<'a>(&'a self, columns: &'a [String], extra_columns: &'a [String]) -> DataFrameGroupView {
[INFO] [stdout]     |                          --                 --                           --              ^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]     |                          |                  |                            |
[INFO] [stdout]     |                          |                  |                            the lifetime is named here
[INFO] [stdout]     |                          |                  the lifetime is named here
[INFO] [stdout]     |                          the lifetime is named here
[INFO] [stdout]     |
[INFO] [stdout]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout] help: consistently use `'a`
[INFO] [stdout]     |
[INFO] [stdout] 141 |     pub fn group_by<'a>(&'a self, columns: &'a [String], extra_columns: &'a [String]) -> DataFrameGroupView<'a> {
[INFO] [stdout]     |                                                                                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.01s
[INFO] running `Command { std: "docker" "inspect" "3e0ad637e902c4d70d4bb3f6f26a2597040a3029a4a6db6d5f050a258dafbaba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e0ad637e902c4d70d4bb3f6f26a2597040a3029a4a6db6d5f050a258dafbaba", kill_on_drop: false }`
[INFO] [stdout] 3e0ad637e902c4d70d4bb3f6f26a2597040a3029a4a6db6d5f050a258dafbaba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-03-05" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 92d76e19ed13b2fffbfa12c473fe1f049db6c985ae0d30b1af639c20879448a1
[INFO] running `Command { std: "docker" "start" "-a" "92d76e19ed13b2fffbfa12c473fe1f049db6c985ae0d30b1af639c20879448a1", kill_on_drop: false }`
[INFO] [stderr] warning: method `row` is never used
[INFO] [stderr]   --> src/io/dataframe.rs:58:8
[INFO] [stderr]    |
[INFO] [stderr] 55 | pub trait DataFrame {
[INFO] [stderr]    |           --------- method in this trait
[INFO] [stderr] ...
[INFO] [stderr] 58 |     fn row(&self, index: usize) -> Vec<ColumnValue>;
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stderr]    --> src/io/dataframe.rs:124:19
[INFO] [stderr]     |
[INFO] [stderr] 124 |     pub fn filter(&self, column_filters: &HashMap<String, ColumnValue>) -> DataFrameFilterView {
[INFO] [stderr]     |                   ^^^^^ the lifetime is elided here                        ^^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr]     = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stderr] help: use `'_` for type paths
[INFO] [stderr]     |
[INFO] [stderr] 124 |     pub fn filter(&self, column_filters: &HashMap<String, ColumnValue>) -> DataFrameFilterView<'_> {
[INFO] [stderr]     |                                                                                               ++++
[INFO] [stderr] 
[INFO] [stderr] warning: hiding a lifetime that's named elsewhere is confusing
[INFO] [stderr]    --> src/io/dataframe.rs:141:90
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn group_by<'a>(&'a self, columns: &'a [String], extra_columns: &'a [String]) -> DataFrameGroupView {
[INFO] [stderr]     |                          --                 --                           --              ^^^^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stderr]     |                          |                  |                            |
[INFO] [stderr]     |                          |                  |                            the lifetime is named here
[INFO] [stderr]     |                          |                  the lifetime is named here
[INFO] [stderr]     |                          the lifetime is named here
[INFO] [stderr]     |
[INFO] [stderr]     = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stderr] help: consistently use `'a`
[INFO] [stderr]     |
[INFO] [stderr] 141 |     pub fn group_by<'a>(&'a self, columns: &'a [String], extra_columns: &'a [String]) -> DataFrameGroupView<'a> {
[INFO] [stderr]     |                                                                                                            ++++
[INFO] [stderr] 
[INFO] [stderr] warning: `group` (bin "group" test) generated 3 warnings (run `cargo fix --bin "group" -p group --tests` to apply 2 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/group-e7f95b2cf648926d)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test io::input::test::read_dataframe_parses_column_with_missing_values ... ok
[INFO] [stdout] test io::input::test::read_dataframe_parses_integer_column ... ok
[INFO] [stdout] test io::input::test::read_dataframe_parses_integer_column_when_reading_single_object ... ok
[INFO] [stdout] test io::input::test::read_dataframe_parses_string_column_when_reading_single_object ... ok
[INFO] [stdout] test io::input::test::read_dataframe_parses_datetime_column ... ok
[INFO] [stdout] test io::input::test::read_dataframe_converts_datetime_to_utc ... ok
[INFO] [stdout] test io::input::test::read_dataframe_parses_datetime_column_when_readin_single_object ... ok
[INFO] [stdout] test io::input::test::read_dataframe_parses_string_column ... ok
[INFO] [stdout] test io::input::test::read_dataframe_parses_column_with_missing_values_when_reading_single_object ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "92d76e19ed13b2fffbfa12c473fe1f049db6c985ae0d30b1af639c20879448a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92d76e19ed13b2fffbfa12c473fe1f049db6c985ae0d30b1af639c20879448a1", kill_on_drop: false }`
[INFO] [stdout] 92d76e19ed13b2fffbfa12c473fe1f049db6c985ae0d30b1af639c20879448a1
