Dec 17 14:58:15.962 INFO checking souvik1997/fsbench against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 14:58:15.962 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 14:58:16.471 INFO [stdout] 8223c30e84de7e77de3417493c75c66276a59a9a22b4570a7f64f16acb65ec64
Dec 17 14:58:16.473 INFO running `"docker" "start" "-a" "8223c30e84de7e77de3417493c75c66276a59a9a22b4570a7f64f16acb65ec64"`
Dec 17 14:58:19.651 INFO [stderr]    Compiling nix v0.10.0
Dec 17 14:58:19.652 INFO [stderr]    Compiling num-traits v0.2.2
Dec 17 14:58:19.653 INFO [stderr]     Checking serde v1.0.29
Dec 17 14:58:19.653 INFO [stderr]     Checking iovec v0.1.2
Dec 17 14:58:19.653 INFO [stderr]     Checking log v0.4.1
Dec 17 14:58:19.654 INFO [stderr]     Checking crossbeam-epoch v0.3.0
Dec 17 14:58:19.654 INFO [stderr]     Checking num-bigint v0.1.43
Dec 17 14:58:19.661 INFO [stderr]     Checking tempdir v0.3.6
Dec 17 14:58:21.068 INFO [stderr]     Checking bytes v0.4.6
Dec 17 14:58:21.954 INFO [stderr]     Checking fern v0.5.2
Dec 17 14:58:22.986 INFO [stderr]     Checking crossbeam-deque v0.2.0
Dec 17 14:58:24.758 INFO [stderr]     Checking rayon-core v1.4.0
Dec 17 14:58:28.029 INFO [stderr]     Checking rayon v1.0.0
Dec 17 14:58:28.918 INFO [stderr]    Compiling num-derive v0.2.0
Dec 17 14:58:29.009 INFO [stderr]     Checking num-rational v0.1.42
Dec 17 14:58:31.798 INFO [stderr]     Checking num v0.1.42
Dec 17 14:58:32.254 INFO [stderr]     Checking chrono v0.4.0
Dec 17 14:58:45.771 INFO [stderr]     Checking serde_json v1.0.11
Dec 17 14:58:47.876 INFO [stderr]     Checking fsbench v0.1.0 (/opt/crater/workdir)
Dec 17 14:58:48.680 INFO [stderr] warning: unused import: `std::process::Command`
Dec 17 14:58:48.680 INFO [stderr]    --> src/fsbench/blktrace/trace.rs:173:13
Dec 17 14:58:48.680 INFO [stderr]     |
Dec 17 14:58:48.680 INFO [stderr] 173 |         use std::process::Command;
Dec 17 14:58:48.680 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:48.680 INFO [stderr]     |
Dec 17 14:58:48.680 INFO [stderr]     = note: #[warn(unused_imports)] on by default
Dec 17 14:58:48.680 INFO [stderr] 
Dec 17 14:58:48.872 INFO [stderr] warning: unused import: `std::process::Command`
Dec 17 14:58:48.872 INFO [stderr]    --> src/fsbench/blktrace/trace.rs:173:13
Dec 17 14:58:48.872 INFO [stderr]     |
Dec 17 14:58:48.873 INFO [stderr] 173 |         use std::process::Command;
Dec 17 14:58:48.873 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:48.873 INFO [stderr]     |
Dec 17 14:58:48.873 INFO [stderr]     = note: #[warn(unused_imports)] on by default
Dec 17 14:58:48.874 INFO [stderr] 
Dec 17 14:58:50.076 INFO [stderr] warning: unused variable: `split_string`
Dec 17 14:58:50.076 INFO [stderr]   --> src/fsbench/operation.rs:28:9
Dec 17 14:58:50.076 INFO [stderr]    |
Dec 17 14:58:50.076 INFO [stderr] 28 |     let split_string = vec![String::new()];
Dec 17 14:58:50.076 INFO [stderr]    |         ^^^^^^^^^^^^ help: consider using `_split_string` instead
Dec 17 14:58:50.076 INFO [stderr]    |
Dec 17 14:58:50.076 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 14:58:50.076 INFO [stderr] 
Dec 17 14:58:50.082 INFO [stderr] warning: variable `bytes` is assigned to, but never used
Dec 17 14:58:50.082 INFO [stderr]    --> src/fsbench/operation.rs:304:17
Dec 17 14:58:50.082 INFO [stderr]     |
Dec 17 14:58:50.082 INFO [stderr] 304 |         let mut bytes = 0;
Dec 17 14:58:50.082 INFO [stderr]     |                 ^^^^^
Dec 17 14:58:50.082 INFO [stderr]     |
Dec 17 14:58:50.082 INFO [stderr]     = note: consider using `_bytes` instead
Dec 17 14:58:50.083 INFO [stderr] 
Dec 17 14:58:50.095 INFO [stderr] warning: unused variable: `split_string`
Dec 17 14:58:50.095 INFO [stderr]   --> src/fsbench/operation.rs:28:9
Dec 17 14:58:50.095 INFO [stderr]    |
Dec 17 14:58:50.095 INFO [stderr] 28 |     let split_string = vec![String::new()];
Dec 17 14:58:50.095 INFO [stderr]    |         ^^^^^^^^^^^^ help: consider using `_split_string` instead
Dec 17 14:58:50.095 INFO [stderr]    |
Dec 17 14:58:50.100 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 14:58:50.100 INFO [stderr] 
Dec 17 14:58:50.110 INFO [stderr] warning: variable `bytes` is assigned to, but never used
Dec 17 14:58:50.110 INFO [stderr]    --> src/fsbench/operation.rs:304:17
Dec 17 14:58:50.110 INFO [stderr]     |
Dec 17 14:58:50.110 INFO [stderr] 304 |         let mut bytes = 0;
Dec 17 14:58:50.110 INFO [stderr]     |                 ^^^^^
Dec 17 14:58:50.110 INFO [stderr]     |
Dec 17 14:58:50.110 INFO [stderr]     = note: consider using `_bytes` instead
Dec 17 14:58:50.110 INFO [stderr] 
Dec 17 14:58:50.704 INFO [stderr] warning: constant item is never used: `SECTOR_SIZE`
Dec 17 14:58:50.704 INFO [stderr]  --> src/fsbench/blktrace/trace.rs:9:1
Dec 17 14:58:50.704 INFO [stderr]   |
Dec 17 14:58:50.704 INFO [stderr] 9 | pub const SECTOR_SIZE: usize = 512;
Dec 17 14:58:50.704 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.704 INFO [stderr]   |
Dec 17 14:58:50.704 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 14:58:50.704 INFO [stderr] 
Dec 17 14:58:50.704 INFO [stderr] warning: field is never used: `elapsed`
Dec 17 14:58:50.704 INFO [stderr]    --> src/fsbench/blktrace/trace.rs:147:5
Dec 17 14:58:50.704 INFO [stderr]     |
Dec 17 14:58:50.704 INFO [stderr] 147 |     elapsed: Duration,
Dec 17 14:58:50.704 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.704 INFO [stderr] 
Dec 17 14:58:50.704 INFO [stderr] warning: method is never used: `total_duration`
Dec 17 14:58:50.704 INFO [stderr]    --> src/fsbench/blktrace/trace.rs:243:5
Dec 17 14:58:50.704 INFO [stderr]     |
Dec 17 14:58:50.704 INFO [stderr] 243 |     pub fn total_duration(&self) -> Duration {
Dec 17 14:58:50.704 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.704 INFO [stderr] 
Dec 17 14:58:50.704 INFO [stderr] warning: struct is never constructed: `Read`
Dec 17 14:58:50.704 INFO [stderr]    --> src/fsbench/operation.rs:160:1
Dec 17 14:58:50.704 INFO [stderr]     |
Dec 17 14:58:50.704 INFO [stderr] 160 | pub struct Read {
Dec 17 14:58:50.704 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 17 14:58:50.704 INFO [stderr] 
Dec 17 14:58:50.704 INFO [stderr] warning: method is never used: `new`
Dec 17 14:58:50.705 INFO [stderr]    --> src/fsbench/operation.rs:165:5
Dec 17 14:58:50.705 INFO [stderr]     |
Dec 17 14:58:50.705 INFO [stderr] 165 |     pub fn new() -> Read {
Dec 17 14:58:50.705 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.705 INFO [stderr] 
Dec 17 14:58:50.705 INFO [stderr] warning: method is never used: `run`
Dec 17 14:58:50.705 INFO [stderr]    --> src/fsbench/operation.rs:171:5
Dec 17 14:58:50.705 INFO [stderr]     |
Dec 17 14:58:50.705 INFO [stderr] 171 |     pub fn run(&mut self, fd: RawFd, buf: &mut [u8]) -> nix::Result<usize> {
Dec 17 14:58:50.705 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.705 INFO [stderr] 
Dec 17 14:58:50.705 INFO [stderr] warning: struct is never constructed: `Write`
Dec 17 14:58:50.705 INFO [stderr]    --> src/fsbench/operation.rs:192:1
Dec 17 14:58:50.705 INFO [stderr]     |
Dec 17 14:58:50.705 INFO [stderr] 192 | pub struct Write {
Dec 17 14:58:50.705 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 17 14:58:50.705 INFO [stderr] 
Dec 17 14:58:50.705 INFO [stderr] warning: method is never used: `new`
Dec 17 14:58:50.705 INFO [stderr]    --> src/fsbench/operation.rs:197:5
Dec 17 14:58:50.705 INFO [stderr]     |
Dec 17 14:58:50.705 INFO [stderr] 197 |     pub fn new() -> Write {
Dec 17 14:58:50.705 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.705 INFO [stderr] 
Dec 17 14:58:50.705 INFO [stderr] warning: method is never used: `run`
Dec 17 14:58:50.705 INFO [stderr]    --> src/fsbench/operation.rs:203:5
Dec 17 14:58:50.705 INFO [stderr]     |
Dec 17 14:58:50.705 INFO [stderr] 203 |     pub fn run(&mut self, fd: RawFd, buf: &[u8]) -> nix::Result<usize> {
Dec 17 14:58:50.705 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.705 INFO [stderr] 
Dec 17 14:58:50.705 INFO [stderr] warning: method is never used: `ops_per_second`
Dec 17 14:58:50.705 INFO [stderr]   --> src/fsbench/statistics.rs:42:5
Dec 17 14:58:50.705 INFO [stderr]    |
Dec 17 14:58:50.705 INFO [stderr] 42 |     pub fn ops_per_second(&self) -> f64 {
Dec 17 14:58:50.705 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.705 INFO [stderr] 
Dec 17 14:58:50.705 INFO [stderr] warning: the feature `duration_extras` has been stable since 1.27.0 and no longer requires an attribute to enable
Dec 17 14:58:50.705 INFO [stderr]  --> src/main.rs:1:12
Dec 17 14:58:50.705 INFO [stderr]   |
Dec 17 14:58:50.705 INFO [stderr] 1 | #![feature(duration_extras)]
Dec 17 14:58:50.705 INFO [stderr]   |            ^^^^^^^^^^^^^^^
Dec 17 14:58:50.705 INFO [stderr]   |
Dec 17 14:58:50.705 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 17 14:58:50.705 INFO [stderr] 
Dec 17 14:58:50.836 INFO [stderr] warning: constant item is never used: `SECTOR_SIZE`
Dec 17 14:58:50.836 INFO [stderr]  --> src/fsbench/blktrace/trace.rs:9:1
Dec 17 14:58:50.836 INFO [stderr]   |
Dec 17 14:58:50.836 INFO [stderr] 9 | pub const SECTOR_SIZE: usize = 512;
Dec 17 14:58:50.836 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.836 INFO [stderr]   |
Dec 17 14:58:50.836 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 14:58:50.836 INFO [stderr] 
Dec 17 14:58:50.839 INFO [stderr] warning: field is never used: `elapsed`
Dec 17 14:58:50.840 INFO [stderr]    --> src/fsbench/blktrace/trace.rs:147:5
Dec 17 14:58:50.840 INFO [stderr]     |
Dec 17 14:58:50.840 INFO [stderr] 147 |     elapsed: Duration,
Dec 17 14:58:50.840 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.840 INFO [stderr] 
Dec 17 14:58:50.841 INFO [stderr] warning: method is never used: `total_duration`
Dec 17 14:58:50.841 INFO [stderr]    --> src/fsbench/blktrace/trace.rs:243:5
Dec 17 14:58:50.841 INFO [stderr]     |
Dec 17 14:58:50.841 INFO [stderr] 243 |     pub fn total_duration(&self) -> Duration {
Dec 17 14:58:50.841 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.842 INFO [stderr] 
Dec 17 14:58:50.842 INFO [stderr] warning: struct is never constructed: `Read`
Dec 17 14:58:50.842 INFO [stderr]    --> src/fsbench/operation.rs:160:1
Dec 17 14:58:50.842 INFO [stderr]     |
Dec 17 14:58:50.842 INFO [stderr] 160 | pub struct Read {
Dec 17 14:58:50.843 INFO [stderr]     | ^^^^^^^^^^^^^^^
Dec 17 14:58:50.843 INFO [stderr] 
Dec 17 14:58:50.843 INFO [stderr] warning: method is never used: `new`
Dec 17 14:58:50.843 INFO [stderr]    --> src/fsbench/operation.rs:165:5
Dec 17 14:58:50.844 INFO [stderr]     |
Dec 17 14:58:50.844 INFO [stderr] 165 |     pub fn new() -> Read {
Dec 17 14:58:50.844 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.844 INFO [stderr] 
Dec 17 14:58:50.845 INFO [stderr] warning: method is never used: `run`
Dec 17 14:58:50.845 INFO [stderr]    --> src/fsbench/operation.rs:171:5
Dec 17 14:58:50.845 INFO [stderr]     |
Dec 17 14:58:50.846 INFO [stderr] 171 |     pub fn run(&mut self, fd: RawFd, buf: &mut [u8]) -> nix::Result<usize> {
Dec 17 14:58:50.846 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.846 INFO [stderr] 
Dec 17 14:58:50.846 INFO [stderr] warning: struct is never constructed: `Write`
Dec 17 14:58:50.847 INFO [stderr]    --> src/fsbench/operation.rs:192:1
Dec 17 14:58:50.847 INFO [stderr]     |
Dec 17 14:58:50.847 INFO [stderr] 192 | pub struct Write {
Dec 17 14:58:50.848 INFO [stderr]     | ^^^^^^^^^^^^^^^^
Dec 17 14:58:50.848 INFO [stderr] 
Dec 17 14:58:50.848 INFO [stderr] warning: method is never used: `new`
Dec 17 14:58:50.848 INFO [stderr]    --> src/fsbench/operation.rs:197:5
Dec 17 14:58:50.848 INFO [stderr]     |
Dec 17 14:58:50.848 INFO [stderr] 197 |     pub fn new() -> Write {
Dec 17 14:58:50.848 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.848 INFO [stderr] 
Dec 17 14:58:50.848 INFO [stderr] warning: method is never used: `run`
Dec 17 14:58:50.848 INFO [stderr]    --> src/fsbench/operation.rs:203:5
Dec 17 14:58:50.848 INFO [stderr]     |
Dec 17 14:58:50.848 INFO [stderr] 203 |     pub fn run(&mut self, fd: RawFd, buf: &[u8]) -> nix::Result<usize> {
Dec 17 14:58:50.848 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.848 INFO [stderr] 
Dec 17 14:58:50.848 INFO [stderr] warning: method is never used: `ops_per_second`
Dec 17 14:58:50.848 INFO [stderr]   --> src/fsbench/statistics.rs:42:5
Dec 17 14:58:50.848 INFO [stderr]    |
Dec 17 14:58:50.848 INFO [stderr] 42 |     pub fn ops_per_second(&self) -> f64 {
Dec 17 14:58:50.848 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:58:50.848 INFO [stderr] 
Dec 17 14:58:50.848 INFO [stderr] warning: the feature `duration_extras` has been stable since 1.27.0 and no longer requires an attribute to enable
Dec 17 14:58:50.848 INFO [stderr]  --> src/main.rs:1:12
Dec 17 14:58:50.848 INFO [stderr]   |
Dec 17 14:58:50.848 INFO [stderr] 1 | #![feature(duration_extras)]
Dec 17 14:58:50.848 INFO [stderr]   |            ^^^^^^^^^^^^^^^
Dec 17 14:58:50.848 INFO [stderr]   |
Dec 17 14:58:50.848 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 17 14:58:50.848 INFO [stderr] 
Dec 17 14:58:50.954 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.51s
Dec 17 14:58:52.052 INFO running `"docker" "inspect" "8223c30e84de7e77de3417493c75c66276a59a9a22b4570a7f64f16acb65ec64"`
Dec 17 14:58:52.448 INFO running `"docker" "rm" "-f" "8223c30e84de7e77de3417493c75c66276a59a9a22b4570a7f64f16acb65ec64"`
Dec 17 14:58:52.832 INFO [stdout] 8223c30e84de7e77de3417493c75c66276a59a9a22b4570a7f64f16acb65ec64