Dec 02 22:20:07.264 INFO testing podstats-0.1.2 against 1.30.1 for beta-1.31-5
Dec 02 22:20:07.265 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 22:20:07.620 INFO [stdout] ce2c6dcd00a2a5bdf9b5bb74245e8dbec43954cbe54e8cdca63af5c204aea106
Dec 02 22:20:07.624 INFO running `"docker" "start" "-a" "ce2c6dcd00a2a5bdf9b5bb74245e8dbec43954cbe54e8cdca63af5c204aea106"`
Dec 02 22:20:08.491 INFO [stderr] usermod: no changes
Dec 02 22:20:08.650 INFO [stderr]    Compiling podstats v0.1.2 (/source)
Dec 02 22:20:10.259 INFO [stderr] warning: unused `#[macro_use]` import
Dec 02 22:20:10.259 INFO [stderr]  --> src/lib.rs:3:1
Dec 02 22:20:10.259 INFO [stderr]   |
Dec 02 22:20:10.259 INFO [stderr] 3 | #[macro_use]
Dec 02 22:20:10.259 INFO [stderr]   | ^^^^^^^^^^^^
Dec 02 22:20:10.259 INFO [stderr]   |
Dec 02 22:20:10.259 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 02 22:20:10.259 INFO [stderr] 
Dec 02 22:20:10.259 INFO [stderr] warning: unused import: `std::fs`
Dec 02 22:20:10.259 INFO [stderr]  --> src/subscription.rs:7:5
Dec 02 22:20:10.259 INFO [stderr]   |
Dec 02 22:20:10.259 INFO [stderr] 7 | use std::fs;
Dec 02 22:20:10.259 INFO [stderr]   |     ^^^^^^^
Dec 02 22:20:10.259 INFO [stderr] 
Dec 02 22:20:10.575 INFO [stderr] warning: unused variable: `bytes`
Dec 02 22:20:10.575 INFO [stderr]    --> src/config.rs:166:9
Dec 02 22:20:10.575 INFO [stderr]     |
Dec 02 22:20:10.575 INFO [stderr] 166 |     let bytes = match res {
Dec 02 22:20:10.575 INFO [stderr]     |         ^^^^^ help: consider using `_bytes` instead
Dec 02 22:20:10.575 INFO [stderr]     |
Dec 02 22:20:10.575 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 02 22:20:10.575 INFO [stderr] 
Dec 02 22:20:10.682 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:10.683 INFO [stderr]    --> src/config.rs:149:9
Dec 02 22:20:10.683 INFO [stderr]     |
Dec 02 22:20:10.683 INFO [stderr] 149 |         file.write_all(b"");
Dec 02 22:20:10.683 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:10.683 INFO [stderr]     |
Dec 02 22:20:10.683 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 02 22:20:10.683 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:10.683 INFO [stderr] 
Dec 02 22:20:10.683 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:10.683 INFO [stderr]    --> src/config.rs:171:5
Dec 02 22:20:10.683 INFO [stderr]     |
Dec 02 22:20:10.683 INFO [stderr] 171 |     file.flush();
Dec 02 22:20:10.683 INFO [stderr]     |     ^^^^^^^^^^^^^
Dec 02 22:20:10.683 INFO [stderr]     |
Dec 02 22:20:10.683 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:10.683 INFO [stderr] 
Dec 02 22:20:15.423 INFO [stderr] warning: unused `#[macro_use]` import
Dec 02 22:20:15.423 INFO [stderr]  --> src/main.rs:3:1
Dec 02 22:20:15.423 INFO [stderr]   |
Dec 02 22:20:15.423 INFO [stderr] 3 | #[macro_use]
Dec 02 22:20:15.423 INFO [stderr]   | ^^^^^^^^^^^^
Dec 02 22:20:15.423 INFO [stderr]   |
Dec 02 22:20:15.423 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 02 22:20:15.423 INFO [stderr] 
Dec 02 22:20:15.423 INFO [stderr] warning: unused import: `SubCommand`
Dec 02 22:20:15.423 INFO [stderr]  --> src/main.rs:8:22
Dec 02 22:20:15.423 INFO [stderr]   |
Dec 02 22:20:15.423 INFO [stderr] 8 | use clap::{Arg, App, SubCommand};
Dec 02 22:20:15.423 INFO [stderr]   |                      ^^^^^^^^^^
Dec 02 22:20:15.423 INFO [stderr] 
Dec 02 22:20:15.423 INFO [stderr] warning: unused import: `std::fs`
Dec 02 22:20:15.423 INFO [stderr]  --> src/subscription.rs:7:5
Dec 02 22:20:15.423 INFO [stderr]   |
Dec 02 22:20:15.423 INFO [stderr] 7 | use std::fs;
Dec 02 22:20:15.423 INFO [stderr]   |     ^^^^^^^
Dec 02 22:20:15.423 INFO [stderr] 
Dec 02 22:20:15.807 INFO [stderr] warning: unused variable: `bytes`
Dec 02 22:20:15.807 INFO [stderr]    --> src/config.rs:166:9
Dec 02 22:20:15.807 INFO [stderr]     |
Dec 02 22:20:15.807 INFO [stderr] 166 |     let bytes = match res {
Dec 02 22:20:15.807 INFO [stderr]     |         ^^^^^ help: consider using `_bytes` instead
Dec 02 22:20:15.807 INFO [stderr]     |
Dec 02 22:20:15.807 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 02 22:20:15.807 INFO [stderr] 
Dec 02 22:20:15.959 INFO [stderr] warning: function is never used: `read_config`
Dec 02 22:20:15.959 INFO [stderr]   --> src/config.rs:89:1
Dec 02 22:20:15.959 INFO [stderr]    |
Dec 02 22:20:15.959 INFO [stderr] 89 | pub fn read_config() -> Option<Config> {
Dec 02 22:20:15.959 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:15.959 INFO [stderr]    |
Dec 02 22:20:15.959 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 02 22:20:15.959 INFO [stderr] 
Dec 02 22:20:15.959 INFO [stderr] warning: function is never used: `write_config`
Dec 02 22:20:15.959 INFO [stderr]    --> src/config.rs:123:1
Dec 02 22:20:15.959 INFO [stderr]     |
Dec 02 22:20:15.959 INFO [stderr] 123 | pub fn write_config(config: Config) {
Dec 02 22:20:15.959 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:15.959 INFO [stderr] 
Dec 02 22:20:15.959 INFO [stderr] warning: method is never used: `new`
Dec 02 22:20:15.959 INFO [stderr]   --> src/subscription.rs:24:5
Dec 02 22:20:15.959 INFO [stderr]    |
Dec 02 22:20:15.959 INFO [stderr] 24 |     pub fn new(url: &str, name: &str, directory: Option<&str>) -> Subscription {
Dec 02 22:20:15.959 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:15.959 INFO [stderr] 
Dec 02 22:20:15.959 INFO [stderr] warning: function is never used: `vec_serialize`
Dec 02 22:20:15.959 INFO [stderr]   --> src/subscription.rs:54:1
Dec 02 22:20:15.959 INFO [stderr]    |
Dec 02 22:20:15.959 INFO [stderr] 54 | pub fn vec_serialize(subs: &Vec<Subscription>) -> Vec<u8> {
Dec 02 22:20:15.959 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:15.959 INFO [stderr] 
Dec 02 22:20:15.959 INFO [stderr] warning: function is never used: `serialize`
Dec 02 22:20:15.959 INFO [stderr]   --> src/subscription.rs:63:1
Dec 02 22:20:15.959 INFO [stderr]    |
Dec 02 22:20:15.959 INFO [stderr] 63 | pub fn serialize(sub: &Subscription) -> Vec<u8> {
Dec 02 22:20:15.959 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:15.959 INFO [stderr] 
Dec 02 22:20:15.959 INFO [stderr] warning: function is never used: `deserialize`
Dec 02 22:20:15.959 INFO [stderr]   --> src/subscription.rs:72:1
Dec 02 22:20:15.959 INFO [stderr]    |
Dec 02 22:20:15.959 INFO [stderr] 72 | pub fn deserialize(sub_vec: &Vec<u8>) -> Option<Subscription> {
Dec 02 22:20:15.959 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:15.959 INFO [stderr] 
Dec 02 22:20:15.959 INFO [stderr] warning: function is never used: `process_directory`
Dec 02 22:20:15.959 INFO [stderr]    --> src/subscription.rs:116:1
Dec 02 22:20:15.959 INFO [stderr]     |
Dec 02 22:20:15.959 INFO [stderr] 116 | fn process_directory(directory: Option<&str>) -> String {
Dec 02 22:20:15.959 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:15.959 INFO [stderr] 
Dec 02 22:20:15.963 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:15.963 INFO [stderr]    --> src/config.rs:149:9
Dec 02 22:20:15.963 INFO [stderr]     |
Dec 02 22:20:15.963 INFO [stderr] 149 |         file.write_all(b"");
Dec 02 22:20:15.963 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:15.963 INFO [stderr]     |
Dec 02 22:20:15.963 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 02 22:20:15.963 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:15.963 INFO [stderr] 
Dec 02 22:20:15.963 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:15.963 INFO [stderr]    --> src/config.rs:171:5
Dec 02 22:20:15.963 INFO [stderr]     |
Dec 02 22:20:15.963 INFO [stderr] 171 |     file.flush();
Dec 02 22:20:15.963 INFO [stderr]     |     ^^^^^^^^^^^^^
Dec 02 22:20:15.963 INFO [stderr]     |
Dec 02 22:20:15.963 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:15.963 INFO [stderr] 
Dec 02 22:20:18.983 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.46s
Dec 02 22:20:18.990 INFO [stderr] su: No module specific data is present
Dec 02 22:20:19.503 INFO running `"docker" "inspect" "ce2c6dcd00a2a5bdf9b5bb74245e8dbec43954cbe54e8cdca63af5c204aea106"`
Dec 02 22:20:19.808 INFO running `"docker" "rm" "-f" "ce2c6dcd00a2a5bdf9b5bb74245e8dbec43954cbe54e8cdca63af5c204aea106"`
Dec 02 22:20:20.059 INFO [stdout] ce2c6dcd00a2a5bdf9b5bb74245e8dbec43954cbe54e8cdca63af5c204aea106
Dec 02 22:20:20.067 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 22:20:20.460 INFO [stdout] f37b213c1ff450d6a256001860cb759c37b53e61e58b1118596e901b5f7da31c
Dec 02 22:20:20.462 INFO running `"docker" "start" "-a" "f37b213c1ff450d6a256001860cb759c37b53e61e58b1118596e901b5f7da31c"`
Dec 02 22:20:22.514 INFO [stderr] usermod: no changes
Dec 02 22:20:22.725 INFO [stderr]    Compiling podstats v0.1.2 (/source)
Dec 02 22:20:25.295 INFO [stderr] warning: unused `#[macro_use]` import
Dec 02 22:20:25.295 INFO [stderr]  --> src/lib.rs:3:1
Dec 02 22:20:25.295 INFO [stderr]   |
Dec 02 22:20:25.295 INFO [stderr] 3 | #[macro_use]
Dec 02 22:20:25.295 INFO [stderr]   | ^^^^^^^^^^^^
Dec 02 22:20:25.295 INFO [stderr]   |
Dec 02 22:20:25.295 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 02 22:20:25.295 INFO [stderr] 
Dec 02 22:20:25.767 INFO [stderr] warning: unused variable: `bytes`
Dec 02 22:20:25.767 INFO [stderr]    --> src/config.rs:166:9
Dec 02 22:20:25.767 INFO [stderr]     |
Dec 02 22:20:25.767 INFO [stderr] 166 |     let bytes = match res {
Dec 02 22:20:25.767 INFO [stderr]     |         ^^^^^ help: consider using `_bytes` instead
Dec 02 22:20:25.767 INFO [stderr]     |
Dec 02 22:20:25.767 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 02 22:20:25.767 INFO [stderr] 
Dec 02 22:20:25.827 INFO [stderr] warning: unused `#[macro_use]` import
Dec 02 22:20:25.827 INFO [stderr]  --> src/main.rs:3:1
Dec 02 22:20:25.827 INFO [stderr]   |
Dec 02 22:20:25.827 INFO [stderr] 3 | #[macro_use]
Dec 02 22:20:25.827 INFO [stderr]   | ^^^^^^^^^^^^
Dec 02 22:20:25.827 INFO [stderr]   |
Dec 02 22:20:25.827 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 02 22:20:25.827 INFO [stderr] 
Dec 02 22:20:25.827 INFO [stderr] warning: unused import: `SubCommand`
Dec 02 22:20:25.827 INFO [stderr]  --> src/main.rs:8:22
Dec 02 22:20:25.827 INFO [stderr]   |
Dec 02 22:20:25.827 INFO [stderr] 8 | use clap::{Arg, App, SubCommand};
Dec 02 22:20:25.827 INFO [stderr]   |                      ^^^^^^^^^^
Dec 02 22:20:25.827 INFO [stderr] 
Dec 02 22:20:25.932 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:25.932 INFO [stderr]    --> src/config.rs:149:9
Dec 02 22:20:25.932 INFO [stderr]     |
Dec 02 22:20:25.932 INFO [stderr] 149 |         file.write_all(b"");
Dec 02 22:20:25.932 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:25.932 INFO [stderr]     |
Dec 02 22:20:25.932 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 02 22:20:25.932 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:25.932 INFO [stderr] 
Dec 02 22:20:25.932 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:25.932 INFO [stderr]    --> src/config.rs:171:5
Dec 02 22:20:25.932 INFO [stderr]     |
Dec 02 22:20:25.932 INFO [stderr] 171 |     file.flush();
Dec 02 22:20:25.932 INFO [stderr]     |     ^^^^^^^^^^^^^
Dec 02 22:20:25.932 INFO [stderr]     |
Dec 02 22:20:25.932 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:25.932 INFO [stderr] 
Dec 02 22:20:25.932 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:25.932 INFO [stderr]    --> src/config.rs:229:9
Dec 02 22:20:25.932 INFO [stderr]     |
Dec 02 22:20:25.932 INFO [stderr] 229 |         fs::remove_file(test_cache_loc);
Dec 02 22:20:25.932 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:25.932 INFO [stderr]     |
Dec 02 22:20:25.932 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:25.932 INFO [stderr] 
Dec 02 22:20:25.963 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:25.963 INFO [stderr]    --> src/subscription.rs:208:5
Dec 02 22:20:25.963 INFO [stderr]     |
Dec 02 22:20:25.963 INFO [stderr] 208 |     fs::remove_file(test_path);
Dec 02 22:20:25.963 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:25.963 INFO [stderr]     |
Dec 02 22:20:25.963 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:25.963 INFO [stderr] 
Dec 02 22:20:26.515 INFO [stderr] warning: unused variable: `bytes`
Dec 02 22:20:26.515 INFO [stderr]    --> src/config.rs:166:9
Dec 02 22:20:26.515 INFO [stderr]     |
Dec 02 22:20:26.515 INFO [stderr] 166 |     let bytes = match res {
Dec 02 22:20:26.515 INFO [stderr]     |         ^^^^^ help: consider using `_bytes` instead
Dec 02 22:20:26.515 INFO [stderr]     |
Dec 02 22:20:26.515 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 02 22:20:26.515 INFO [stderr] 
Dec 02 22:20:26.690 INFO [stderr] warning: function is never used: `read_config`
Dec 02 22:20:26.690 INFO [stderr]   --> src/config.rs:89:1
Dec 02 22:20:26.690 INFO [stderr]    |
Dec 02 22:20:26.690 INFO [stderr] 89 | pub fn read_config() -> Option<Config> {
Dec 02 22:20:26.690 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:26.690 INFO [stderr]    |
Dec 02 22:20:26.690 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 02 22:20:26.690 INFO [stderr] 
Dec 02 22:20:26.690 INFO [stderr] warning: function is never used: `write_config`
Dec 02 22:20:26.690 INFO [stderr]    --> src/config.rs:123:1
Dec 02 22:20:26.690 INFO [stderr]     |
Dec 02 22:20:26.690 INFO [stderr] 123 | pub fn write_config(config: Config) {
Dec 02 22:20:26.690 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:26.690 INFO [stderr] 
Dec 02 22:20:26.690 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:26.690 INFO [stderr]    --> src/config.rs:149:9
Dec 02 22:20:26.690 INFO [stderr]     |
Dec 02 22:20:26.690 INFO [stderr] 149 |         file.write_all(b"");
Dec 02 22:20:26.690 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:26.690 INFO [stderr]     |
Dec 02 22:20:26.690 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 02 22:20:26.690 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:26.690 INFO [stderr] 
Dec 02 22:20:26.690 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:26.690 INFO [stderr]    --> src/config.rs:171:5
Dec 02 22:20:26.690 INFO [stderr]     |
Dec 02 22:20:26.690 INFO [stderr] 171 |     file.flush();
Dec 02 22:20:26.690 INFO [stderr]     |     ^^^^^^^^^^^^^
Dec 02 22:20:26.690 INFO [stderr]     |
Dec 02 22:20:26.690 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:26.690 INFO [stderr] 
Dec 02 22:20:26.690 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:26.690 INFO [stderr]    --> src/config.rs:229:9
Dec 02 22:20:26.690 INFO [stderr]     |
Dec 02 22:20:26.690 INFO [stderr] 229 |         fs::remove_file(test_cache_loc);
Dec 02 22:20:26.690 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:26.690 INFO [stderr]     |
Dec 02 22:20:26.690 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:26.690 INFO [stderr] 
Dec 02 22:20:26.697 INFO [stderr] warning: unused `std::result::Result` which must be used
Dec 02 22:20:26.697 INFO [stderr]    --> src/subscription.rs:208:5
Dec 02 22:20:26.697 INFO [stderr]     |
Dec 02 22:20:26.697 INFO [stderr] 208 |     fs::remove_file(test_path);
Dec 02 22:20:26.697 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 22:20:26.697 INFO [stderr]     |
Dec 02 22:20:26.697 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 22:20:26.697 INFO [stderr] 
Dec 02 22:20:31.391 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.83s
Dec 02 22:20:31.397 INFO [stderr] su: No module specific data is present
Dec 02 22:20:32.297 INFO running `"docker" "inspect" "f37b213c1ff450d6a256001860cb759c37b53e61e58b1118596e901b5f7da31c"`
Dec 02 22:20:32.609 INFO running `"docker" "rm" "-f" "f37b213c1ff450d6a256001860cb759c37b53e61e58b1118596e901b5f7da31c"`
Dec 02 22:20:32.899 INFO [stdout] f37b213c1ff450d6a256001860cb759c37b53e61e58b1118596e901b5f7da31c
