[INFO] cloning repository souvik1997/fsbench
[INFO] running `"git" "clone" "--bare" "git://github.com/souvik1997/fsbench.git" "work/cache/sources/gh/souvik1997/fsbench"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/souvik1997/fsbench'...
[INFO] running `"git" "clone" "work/cache/sources/gh/souvik1997/fsbench" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/souvik1997/fsbench"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/souvik1997/fsbench'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/souvik1997/fsbench" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/souvik1997/fsbench"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/souvik1997/fsbench'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 77cc337e9e88a07ae9381abb4710f4c1b4ae2423
[INFO] sha for GitHub repo souvik1997/fsbench: 77cc337e9e88a07ae9381abb4710f4c1b4ae2423
[INFO] validating manifest of souvik1997/fsbench on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of souvik1997/fsbench on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing souvik1997/fsbench
[INFO] finished frobbing souvik1997/fsbench
[INFO] frobbed toml for souvik1997/fsbench written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/souvik1997/fsbench/Cargo.toml
[INFO] started frobbing souvik1997/fsbench
[INFO] finished frobbing souvik1997/fsbench
[INFO] frobbed toml for souvik1997/fsbench written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/souvik1997/fsbench/Cargo.toml
[INFO] crate souvik1997/fsbench already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fern v0.5.2
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing souvik1997/fsbench against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/souvik1997/fsbench:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] 60e1cae10997f9809e0aeeb279ec28f85ddb5b012c38dfc7e4cf50d2e93f492d
[INFO] running `"docker" "start" "-a" "60e1cae10997f9809e0aeeb279ec28f85ddb5b012c38dfc7e4cf50d2e93f492d"`
[INFO] [stderr]    Compiling serde v1.0.29
[INFO] [stderr]    Compiling colored v1.6.0
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.0
[INFO] [stderr]    Compiling num-bigint v0.1.43
[INFO] [stderr]    Compiling nix v0.10.0
[INFO] [stderr]    Compiling serde_derive_internals v0.20.0
[INFO] [stderr]    Compiling num-derive v0.2.0
[INFO] [stderr]    Compiling tempdir v0.3.6
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling fern v0.5.2
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.29
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling rayon v1.0.0
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling chrono v0.4.0
[INFO] [stderr]    Compiling serde_json v1.0.11
[INFO] [stderr]    Compiling fsbench v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/create.rs:22:62
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/create.rs:63:62
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/create.rs:94:62
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `rand` is imported redundantly
[INFO] [stderr]    --> src/benchmarks/create.rs:255:13
[INFO] [stderr]     |
[INFO] [stderr] 255 |         use super::rand;
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/main.rs:9:1
[INFO] [stderr]     |
[INFO] [stderr] 9   | extern crate rand;
[INFO] [stderr]     | ------------------ the item `rand` is already imported here
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/delete.rs:33:62
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `serde_json` is imported redundantly
[INFO] [stderr]   --> src/benchmarks/delete.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 10 | use super::serde_json;
[INFO] [stderr]    |     ----------------- the item `serde_json` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 34 |         use super::serde_json;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `rand` is imported redundantly
[INFO] [stderr]   --> src/benchmarks/delete.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         use super::rand;
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/main.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr] 9  | extern crate rand;
[INFO] [stderr]    | ------------------ the item `rand` is already imported here
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/rename.rs:34:62
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `serde_json` is imported redundantly
[INFO] [stderr]   --> src/benchmarks/rename.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 11 | use super::serde_json;
[INFO] [stderr]    |     ----------------- the item `serde_json` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 35 |         use super::serde_json;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/listdir.rs:34:62
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `serde_json` is imported redundantly
[INFO] [stderr]   --> src/benchmarks/listdir.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 11 | use super::serde_json;
[INFO] [stderr]    |     ----------------- the item `serde_json` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 35 |         use super::serde_json;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `num` is imported redundantly
[INFO] [stderr]   --> src/fsbench/blktrace/trace.rs:78:13
[INFO] [stderr]    |
[INFO] [stderr] 78 |         use num;
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/main.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | extern crate num;
[INFO] [stderr]    | ----------------- the item `num` is already imported here
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::process::Command`
[INFO] [stderr]    --> src/fsbench/blktrace/trace.rs:173:13
[INFO] [stderr]     |
[INFO] [stderr] 173 |         use std::process::Command;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `split_string`
[INFO] [stderr]   --> src/fsbench/operation.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let split_string = vec![String::new()];
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_split_string`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `bytes` is assigned to, but never used
[INFO] [stderr]    --> src/fsbench/operation.rs:304:17
[INFO] [stderr]     |
[INFO] [stderr] 304 |         let mut bytes = 0;
[INFO] [stderr]     |                 ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: consider using `_bytes` instead
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SECTOR_SIZE`
[INFO] [stderr]  --> src/fsbench/blktrace/trace.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub const SECTOR_SIZE: usize = 512;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `elapsed`
[INFO] [stderr]    --> src/fsbench/blktrace/trace.rs:147:5
[INFO] [stderr]     |
[INFO] [stderr] 147 |     elapsed: Duration,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `total_duration`
[INFO] [stderr]    --> src/fsbench/blktrace/trace.rs:243:5
[INFO] [stderr]     |
[INFO] [stderr] 243 |     pub fn total_duration(&self) -> Duration {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Read`
[INFO] [stderr]    --> src/fsbench/operation.rs:160:1
[INFO] [stderr]     |
[INFO] [stderr] 160 | pub struct Read {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/fsbench/operation.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn new() -> Read {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/fsbench/operation.rs:171:5
[INFO] [stderr]     |
[INFO] [stderr] 171 |     pub fn run(&mut self, fd: RawFd, buf: &mut [u8]) -> nix::Result<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Write`
[INFO] [stderr]    --> src/fsbench/operation.rs:192:1
[INFO] [stderr]     |
[INFO] [stderr] 192 | pub struct Write {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/fsbench/operation.rs:197:5
[INFO] [stderr]     |
[INFO] [stderr] 197 |     pub fn new() -> Write {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/fsbench/operation.rs:203:5
[INFO] [stderr]     |
[INFO] [stderr] 203 |     pub fn run(&mut self, fd: RawFd, buf: &[u8]) -> nix::Result<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `ops_per_second`
[INFO] [stderr]   --> src/fsbench/statistics.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn ops_per_second(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `duration_extras` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_extras)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 01s
[INFO] running `"docker" "inspect" "60e1cae10997f9809e0aeeb279ec28f85ddb5b012c38dfc7e4cf50d2e93f492d"`
[INFO] running `"docker" "rm" "-f" "60e1cae10997f9809e0aeeb279ec28f85ddb5b012c38dfc7e4cf50d2e93f492d"`
[INFO] [stdout] 60e1cae10997f9809e0aeeb279ec28f85ddb5b012c38dfc7e4cf50d2e93f492d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/souvik1997/fsbench:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] a6cc18cc7518b61852af95d97755b31356666a3cdf554f06f0c26af4efe4b0cc
[INFO] running `"docker" "start" "-a" "a6cc18cc7518b61852af95d97755b31356666a3cdf554f06f0c26af4efe4b0cc"`
[INFO] [stderr]    Compiling fsbench v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/create.rs:22:62
[INFO] [stderr]    |
[INFO] [stderr] 22 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/create.rs:63:62
[INFO] [stderr]    |
[INFO] [stderr] 63 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/create.rs:94:62
[INFO] [stderr]    |
[INFO] [stderr] 94 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `rand` is imported redundantly
[INFO] [stderr]    --> src/benchmarks/create.rs:255:13
[INFO] [stderr]     |
[INFO] [stderr] 255 |         use super::rand;
[INFO] [stderr]     |             ^^^^^^^^^^^
[INFO] [stderr]     | 
[INFO] [stderr]    ::: src/main.rs:9:1
[INFO] [stderr]     |
[INFO] [stderr] 9   | extern crate rand;
[INFO] [stderr]     | ------------------ the item `rand` is already imported here
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/delete.rs:33:62
[INFO] [stderr]    |
[INFO] [stderr] 33 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `serde_json` is imported redundantly
[INFO] [stderr]   --> src/benchmarks/delete.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 10 | use super::serde_json;
[INFO] [stderr]    |     ----------------- the item `serde_json` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 34 |         use super::serde_json;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `rand` is imported redundantly
[INFO] [stderr]   --> src/benchmarks/delete.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |         use super::rand;
[INFO] [stderr]    |             ^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/main.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr] 9  | extern crate rand;
[INFO] [stderr]    | ------------------ the item `rand` is already imported here
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/rename.rs:34:62
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `serde_json` is imported redundantly
[INFO] [stderr]   --> src/benchmarks/rename.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 11 | use super::serde_json;
[INFO] [stderr]    |     ----------------- the item `serde_json` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 35 |         use super::serde_json;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/benchmarks/listdir.rs:34:62
[INFO] [stderr]    |
[INFO] [stderr] 34 |     pub fn load<P: AsRef<Path>>(path: P) -> Result<Self, Box<Error>> {
[INFO] [stderr]    |                                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: the item `serde_json` is imported redundantly
[INFO] [stderr]   --> src/benchmarks/listdir.rs:35:13
[INFO] [stderr]    |
[INFO] [stderr] 11 | use super::serde_json;
[INFO] [stderr]    |     ----------------- the item `serde_json` is already imported here
[INFO] [stderr] ...
[INFO] [stderr] 35 |         use super::serde_json;
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the item `num` is imported redundantly
[INFO] [stderr]   --> src/fsbench/blktrace/trace.rs:78:13
[INFO] [stderr]    |
[INFO] [stderr] 78 |         use num;
[INFO] [stderr]    |             ^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/main.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | extern crate num;
[INFO] [stderr]    | ----------------- the item `num` is already imported here
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::process::Command`
[INFO] [stderr]    --> src/fsbench/blktrace/trace.rs:173:13
[INFO] [stderr]     |
[INFO] [stderr] 173 |         use std::process::Command;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `split_string`
[INFO] [stderr]   --> src/fsbench/operation.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let split_string = vec![String::new()];
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_split_string`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `bytes` is assigned to, but never used
[INFO] [stderr]    --> src/fsbench/operation.rs:304:17
[INFO] [stderr]     |
[INFO] [stderr] 304 |         let mut bytes = 0;
[INFO] [stderr]     |                 ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: consider using `_bytes` instead
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `SECTOR_SIZE`
[INFO] [stderr]  --> src/fsbench/blktrace/trace.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | pub const SECTOR_SIZE: usize = 512;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `elapsed`
[INFO] [stderr]    --> src/fsbench/blktrace/trace.rs:147:5
[INFO] [stderr]     |
[INFO] [stderr] 147 |     elapsed: Duration,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `total_duration`
[INFO] [stderr]    --> src/fsbench/blktrace/trace.rs:243:5
[INFO] [stderr]     |
[INFO] [stderr] 243 |     pub fn total_duration(&self) -> Duration {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Read`
[INFO] [stderr]    --> src/fsbench/operation.rs:160:1
[INFO] [stderr]     |
[INFO] [stderr] 160 | pub struct Read {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/fsbench/operation.rs:165:5
[INFO] [stderr]     |
[INFO] [stderr] 165 |     pub fn new() -> Read {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/fsbench/operation.rs:171:5
[INFO] [stderr]     |
[INFO] [stderr] 171 |     pub fn run(&mut self, fd: RawFd, buf: &mut [u8]) -> nix::Result<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Write`
[INFO] [stderr]    --> src/fsbench/operation.rs:192:1
[INFO] [stderr]     |
[INFO] [stderr] 192 | pub struct Write {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]    --> src/fsbench/operation.rs:197:5
[INFO] [stderr]     |
[INFO] [stderr] 197 |     pub fn new() -> Write {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `run`
[INFO] [stderr]    --> src/fsbench/operation.rs:203:5
[INFO] [stderr]     |
[INFO] [stderr] 203 |     pub fn run(&mut self, fd: RawFd, buf: &[u8]) -> nix::Result<usize> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `ops_per_second`
[INFO] [stderr]   --> src/fsbench/statistics.rs:42:5
[INFO] [stderr]    |
[INFO] [stderr] 42 |     pub fn ops_per_second(&self) -> f64 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `duration_extras` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(duration_extras)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.78s
[INFO] running `"docker" "inspect" "a6cc18cc7518b61852af95d97755b31356666a3cdf554f06f0c26af4efe4b0cc"`
[INFO] running `"docker" "rm" "-f" "a6cc18cc7518b61852af95d97755b31356666a3cdf554f06f0c26af4efe4b0cc"`
[INFO] [stdout] a6cc18cc7518b61852af95d97755b31356666a3cdf554f06f0c26af4efe4b0cc
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/souvik1997/fsbench:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen"`
[INFO] [stdout] ecbe2ebf17d2a28ea5a00f94542530b3a2ab4da3f0229b9a581665078348e492
[INFO] running `"docker" "start" "-a" "ecbe2ebf17d2a28ea5a00f94542530b3a2ab4da3f0229b9a581665078348e492"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/fsbench-a70b32718192e750
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "ecbe2ebf17d2a28ea5a00f94542530b3a2ab4da3f0229b9a581665078348e492"`
[INFO] running `"docker" "rm" "-f" "ecbe2ebf17d2a28ea5a00f94542530b3a2ab4da3f0229b9a581665078348e492"`
[INFO] [stdout] ecbe2ebf17d2a28ea5a00f94542530b3a2ab4da3f0229b9a581665078348e492