Dec 18 12:56:23.613 INFO checking podstats-0.1.2 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 12:56:23.613 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/podstats/0.1.2:/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 18 12:56:23.980 INFO [stdout] 57cbab89947da52b5a994db1e665b5304bc7558134e632c4d28a20d3f5975232
Dec 18 12:56:23.982 INFO running `"docker" "start" "-a" "57cbab89947da52b5a994db1e665b5304bc7558134e632c4d28a20d3f5975232"`
Dec 18 12:56:25.069 INFO [stderr]     Checking rmp v0.8.7
Dec 18 12:56:25.668 INFO [stderr]     Checking rmp-serde v0.13.7
Dec 18 12:56:26.333 INFO [stderr]     Checking podstats v0.1.2 (/opt/crater/workdir)
Dec 18 12:56:26.894 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 12:56:26.894 INFO [stderr]  --> src/lib.rs:3:1
Dec 18 12:56:26.894 INFO [stderr]   |
Dec 18 12:56:26.894 INFO [stderr] 3 | #[macro_use]
Dec 18 12:56:26.894 INFO [stderr]   | ^^^^^^^^^^^^
Dec 18 12:56:26.894 INFO [stderr]   |
Dec 18 12:56:26.894 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 12:56:26.894 INFO [stderr] 
Dec 18 12:56:26.894 INFO [stderr] warning: unused import: `std::fs`
Dec 18 12:56:26.894 INFO [stderr]  --> src/subscription.rs:7:5
Dec 18 12:56:26.894 INFO [stderr]   |
Dec 18 12:56:26.894 INFO [stderr] 7 | use std::fs;
Dec 18 12:56:26.894 INFO [stderr]   |     ^^^^^^^
Dec 18 12:56:26.894 INFO [stderr] 
Dec 18 12:56:26.908 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 12:56:26.908 INFO [stderr]  --> src/lib.rs:3:1
Dec 18 12:56:26.908 INFO [stderr]   |
Dec 18 12:56:26.908 INFO [stderr] 3 | #[macro_use]
Dec 18 12:56:26.908 INFO [stderr]   | ^^^^^^^^^^^^
Dec 18 12:56:26.908 INFO [stderr]   |
Dec 18 12:56:26.908 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 12:56:26.908 INFO [stderr] 
Dec 18 12:56:27.171 INFO [stderr] warning: unused variable: `bytes`
Dec 18 12:56:27.171 INFO [stderr]    --> src/config.rs:166:9
Dec 18 12:56:27.171 INFO [stderr]     |
Dec 18 12:56:27.171 INFO [stderr] 166 |     let bytes = match res {
Dec 18 12:56:27.171 INFO [stderr]     |         ^^^^^ help: consider using `_bytes` instead
Dec 18 12:56:27.171 INFO [stderr]     |
Dec 18 12:56:27.171 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 18 12:56:27.171 INFO [stderr] 
Dec 18 12:56:27.216 INFO [stderr] warning: unused variable: `bytes`
Dec 18 12:56:27.216 INFO [stderr]    --> src/config.rs:166:9
Dec 18 12:56:27.216 INFO [stderr]     |
Dec 18 12:56:27.216 INFO [stderr] 166 |     let bytes = match res {
Dec 18 12:56:27.216 INFO [stderr]     |         ^^^^^ help: consider using `_bytes` instead
Dec 18 12:56:27.216 INFO [stderr]     |
Dec 18 12:56:27.216 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 18 12:56:27.216 INFO [stderr] 
Dec 18 12:56:27.296 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:27.296 INFO [stderr]    --> src/config.rs:149:9
Dec 18 12:56:27.296 INFO [stderr]     |
Dec 18 12:56:27.296 INFO [stderr] 149 |         file.write_all(b"");
Dec 18 12:56:27.296 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:27.296 INFO [stderr]     |
Dec 18 12:56:27.296 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 18 12:56:27.296 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:27.296 INFO [stderr] 
Dec 18 12:56:27.296 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:27.296 INFO [stderr]    --> src/config.rs:171:5
Dec 18 12:56:27.297 INFO [stderr]     |
Dec 18 12:56:27.297 INFO [stderr] 171 |     file.flush();
Dec 18 12:56:27.297 INFO [stderr]     |     ^^^^^^^^^^^^^
Dec 18 12:56:27.297 INFO [stderr]     |
Dec 18 12:56:27.297 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:27.297 INFO [stderr] 
Dec 18 12:56:27.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:27.347 INFO [stderr]    --> src/config.rs:149:9
Dec 18 12:56:27.347 INFO [stderr]     |
Dec 18 12:56:27.347 INFO [stderr] 149 |         file.write_all(b"");
Dec 18 12:56:27.347 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:27.347 INFO [stderr]     |
Dec 18 12:56:27.347 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 18 12:56:27.347 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:27.347 INFO [stderr] 
Dec 18 12:56:27.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:27.347 INFO [stderr]    --> src/config.rs:171:5
Dec 18 12:56:27.347 INFO [stderr]     |
Dec 18 12:56:27.347 INFO [stderr] 171 |     file.flush();
Dec 18 12:56:27.347 INFO [stderr]     |     ^^^^^^^^^^^^^
Dec 18 12:56:27.347 INFO [stderr]     |
Dec 18 12:56:27.347 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:27.347 INFO [stderr] 
Dec 18 12:56:27.347 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:27.347 INFO [stderr]    --> src/config.rs:229:9
Dec 18 12:56:27.347 INFO [stderr]     |
Dec 18 12:56:27.347 INFO [stderr] 229 |         fs::remove_file(test_cache_loc);
Dec 18 12:56:27.348 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:27.348 INFO [stderr]     |
Dec 18 12:56:27.348 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:27.348 INFO [stderr] 
Dec 18 12:56:27.356 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:27.356 INFO [stderr]    --> src/subscription.rs:208:5
Dec 18 12:56:27.356 INFO [stderr]     |
Dec 18 12:56:27.356 INFO [stderr] 208 |     fs::remove_file(test_path);
Dec 18 12:56:27.356 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:27.356 INFO [stderr]     |
Dec 18 12:56:27.356 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:27.356 INFO [stderr] 
Dec 18 12:56:27.970 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 12:56:27.970 INFO [stderr]  --> src/main.rs:3:1
Dec 18 12:56:27.970 INFO [stderr]   |
Dec 18 12:56:27.970 INFO [stderr] 3 | #[macro_use]
Dec 18 12:56:27.970 INFO [stderr]   | ^^^^^^^^^^^^
Dec 18 12:56:27.970 INFO [stderr]   |
Dec 18 12:56:27.970 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 12:56:27.970 INFO [stderr] 
Dec 18 12:56:27.970 INFO [stderr] warning: unused import: `SubCommand`
Dec 18 12:56:27.970 INFO [stderr]  --> src/main.rs:8:22
Dec 18 12:56:27.970 INFO [stderr]   |
Dec 18 12:56:27.970 INFO [stderr] 8 | use clap::{Arg, App, SubCommand};
Dec 18 12:56:27.970 INFO [stderr]   |                      ^^^^^^^^^^
Dec 18 12:56:27.970 INFO [stderr] 
Dec 18 12:56:27.983 INFO [stderr] warning: unused import: `std::fs`
Dec 18 12:56:27.983 INFO [stderr]  --> src/subscription.rs:7:5
Dec 18 12:56:27.983 INFO [stderr]   |
Dec 18 12:56:27.983 INFO [stderr] 7 | use std::fs;
Dec 18 12:56:27.983 INFO [stderr]   |     ^^^^^^^
Dec 18 12:56:27.983 INFO [stderr] 
Dec 18 12:56:27.992 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 12:56:27.992 INFO [stderr]  --> src/main.rs:3:1
Dec 18 12:56:27.992 INFO [stderr]   |
Dec 18 12:56:27.992 INFO [stderr] 3 | #[macro_use]
Dec 18 12:56:27.992 INFO [stderr]   | ^^^^^^^^^^^^
Dec 18 12:56:27.992 INFO [stderr]   |
Dec 18 12:56:27.992 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 12:56:27.992 INFO [stderr] 
Dec 18 12:56:27.992 INFO [stderr] warning: unused import: `SubCommand`
Dec 18 12:56:27.992 INFO [stderr]  --> src/main.rs:8:22
Dec 18 12:56:27.992 INFO [stderr]   |
Dec 18 12:56:27.992 INFO [stderr] 8 | use clap::{Arg, App, SubCommand};
Dec 18 12:56:27.992 INFO [stderr]   |                      ^^^^^^^^^^
Dec 18 12:56:27.992 INFO [stderr] 
Dec 18 12:56:28.344 INFO [stderr] warning: unused variable: `bytes`
Dec 18 12:56:28.344 INFO [stderr]    --> src/config.rs:166:9
Dec 18 12:56:28.344 INFO [stderr]     |
Dec 18 12:56:28.344 INFO [stderr] 166 |     let bytes = match res {
Dec 18 12:56:28.344 INFO [stderr]     |         ^^^^^ help: consider using `_bytes` instead
Dec 18 12:56:28.344 INFO [stderr]     |
Dec 18 12:56:28.344 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 18 12:56:28.344 INFO [stderr] 
Dec 18 12:56:28.380 INFO [stderr] warning: unused variable: `bytes`
Dec 18 12:56:28.380 INFO [stderr]    --> src/config.rs:166:9
Dec 18 12:56:28.380 INFO [stderr]     |
Dec 18 12:56:28.380 INFO [stderr] 166 |     let bytes = match res {
Dec 18 12:56:28.380 INFO [stderr]     |         ^^^^^ help: consider using `_bytes` instead
Dec 18 12:56:28.380 INFO [stderr]     |
Dec 18 12:56:28.380 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 18 12:56:28.380 INFO [stderr] 
Dec 18 12:56:28.520 INFO [stderr] warning: function is never used: `read_config`
Dec 18 12:56:28.520 INFO [stderr]   --> src/config.rs:89:1
Dec 18 12:56:28.520 INFO [stderr]    |
Dec 18 12:56:28.520 INFO [stderr] 89 | pub fn read_config() -> Option<Config> {
Dec 18 12:56:28.520 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.520 INFO [stderr]    |
Dec 18 12:56:28.520 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 12:56:28.520 INFO [stderr] 
Dec 18 12:56:28.520 INFO [stderr] warning: function is never used: `write_config`
Dec 18 12:56:28.520 INFO [stderr]    --> src/config.rs:123:1
Dec 18 12:56:28.520 INFO [stderr]     |
Dec 18 12:56:28.520 INFO [stderr] 123 | pub fn write_config(config: Config) {
Dec 18 12:56:28.520 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.520 INFO [stderr] 
Dec 18 12:56:28.522 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:28.522 INFO [stderr]    --> src/config.rs:149:9
Dec 18 12:56:28.522 INFO [stderr]     |
Dec 18 12:56:28.522 INFO [stderr] 149 |         file.write_all(b"");
Dec 18 12:56:28.522 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.522 INFO [stderr]     |
Dec 18 12:56:28.522 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 18 12:56:28.522 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:28.522 INFO [stderr] 
Dec 18 12:56:28.523 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:28.523 INFO [stderr]    --> src/config.rs:171:5
Dec 18 12:56:28.523 INFO [stderr]     |
Dec 18 12:56:28.523 INFO [stderr] 171 |     file.flush();
Dec 18 12:56:28.523 INFO [stderr]     |     ^^^^^^^^^^^^^
Dec 18 12:56:28.523 INFO [stderr]     |
Dec 18 12:56:28.523 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:28.523 INFO [stderr] 
Dec 18 12:56:28.523 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:28.523 INFO [stderr]    --> src/config.rs:229:9
Dec 18 12:56:28.523 INFO [stderr]     |
Dec 18 12:56:28.523 INFO [stderr] 229 |         fs::remove_file(test_cache_loc);
Dec 18 12:56:28.523 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.523 INFO [stderr]     |
Dec 18 12:56:28.523 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:28.523 INFO [stderr] 
Dec 18 12:56:28.529 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:28.529 INFO [stderr]    --> src/subscription.rs:208:5
Dec 18 12:56:28.529 INFO [stderr]     |
Dec 18 12:56:28.529 INFO [stderr] 208 |     fs::remove_file(test_path);
Dec 18 12:56:28.529 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.529 INFO [stderr]     |
Dec 18 12:56:28.529 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:28.530 INFO [stderr] 
Dec 18 12:56:28.530 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:28.530 INFO [stderr]   --> src/util.rs:47:21
Dec 18 12:56:28.530 INFO [stderr]    |
Dec 18 12:56:28.530 INFO [stderr] 47 |                     write!(stdout, "{}", v);
Dec 18 12:56:28.530 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.530 INFO [stderr]    |
Dec 18 12:56:28.530 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:28.530 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 12:56:28.531 INFO [stderr] 
Dec 18 12:56:28.540 INFO [stderr] warning: function is never used: `read_config`
Dec 18 12:56:28.540 INFO [stderr]   --> src/config.rs:89:1
Dec 18 12:56:28.540 INFO [stderr]    |
Dec 18 12:56:28.540 INFO [stderr] 89 | pub fn read_config() -> Option<Config> {
Dec 18 12:56:28.540 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.540 INFO [stderr]    |
Dec 18 12:56:28.541 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 12:56:28.541 INFO [stderr] 
Dec 18 12:56:28.541 INFO [stderr] warning: function is never used: `write_config`
Dec 18 12:56:28.541 INFO [stderr]    --> src/config.rs:123:1
Dec 18 12:56:28.541 INFO [stderr]     |
Dec 18 12:56:28.541 INFO [stderr] 123 | pub fn write_config(config: Config) {
Dec 18 12:56:28.541 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.541 INFO [stderr] 
Dec 18 12:56:28.541 INFO [stderr] warning: method is never used: `new`
Dec 18 12:56:28.541 INFO [stderr]   --> src/subscription.rs:24:5
Dec 18 12:56:28.541 INFO [stderr]    |
Dec 18 12:56:28.541 INFO [stderr] 24 |     pub fn new(url: &str, name: &str, directory: Option<&str>) -> Subscription {
Dec 18 12:56:28.541 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.541 INFO [stderr] 
Dec 18 12:56:28.541 INFO [stderr] warning: function is never used: `vec_serialize`
Dec 18 12:56:28.541 INFO [stderr]   --> src/subscription.rs:54:1
Dec 18 12:56:28.541 INFO [stderr]    |
Dec 18 12:56:28.541 INFO [stderr] 54 | pub fn vec_serialize(subs: &Vec<Subscription>) -> Vec<u8> {
Dec 18 12:56:28.541 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.541 INFO [stderr] 
Dec 18 12:56:28.541 INFO [stderr] warning: function is never used: `serialize`
Dec 18 12:56:28.541 INFO [stderr]   --> src/subscription.rs:63:1
Dec 18 12:56:28.541 INFO [stderr]    |
Dec 18 12:56:28.541 INFO [stderr] 63 | pub fn serialize(sub: &Subscription) -> Vec<u8> {
Dec 18 12:56:28.541 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.541 INFO [stderr] 
Dec 18 12:56:28.542 INFO [stderr] warning: function is never used: `deserialize`
Dec 18 12:56:28.542 INFO [stderr]   --> src/subscription.rs:72:1
Dec 18 12:56:28.542 INFO [stderr]    |
Dec 18 12:56:28.542 INFO [stderr] 72 | pub fn deserialize(sub_vec: &Vec<u8>) -> Option<Subscription> {
Dec 18 12:56:28.542 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.542 INFO [stderr] 
Dec 18 12:56:28.542 INFO [stderr] warning: function is never used: `process_directory`
Dec 18 12:56:28.542 INFO [stderr]    --> src/subscription.rs:116:1
Dec 18 12:56:28.542 INFO [stderr]     |
Dec 18 12:56:28.542 INFO [stderr] 116 | fn process_directory(directory: Option<&str>) -> String {
Dec 18 12:56:28.542 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.542 INFO [stderr] 
Dec 18 12:56:28.544 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:28.544 INFO [stderr]    --> src/config.rs:149:9
Dec 18 12:56:28.544 INFO [stderr]     |
Dec 18 12:56:28.544 INFO [stderr] 149 |         file.write_all(b"");
Dec 18 12:56:28.544 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.544 INFO [stderr]     |
Dec 18 12:56:28.544 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 18 12:56:28.544 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:28.544 INFO [stderr] 
Dec 18 12:56:28.544 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:28.544 INFO [stderr]    --> src/config.rs:171:5
Dec 18 12:56:28.544 INFO [stderr]     |
Dec 18 12:56:28.544 INFO [stderr] 171 |     file.flush();
Dec 18 12:56:28.545 INFO [stderr]     |     ^^^^^^^^^^^^^
Dec 18 12:56:28.545 INFO [stderr]     |
Dec 18 12:56:28.545 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:28.545 INFO [stderr] 
Dec 18 12:56:28.549 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 12:56:28.549 INFO [stderr]   --> src/util.rs:47:21
Dec 18 12:56:28.549 INFO [stderr]    |
Dec 18 12:56:28.549 INFO [stderr] 47 |                     write!(stdout, "{}", v);
Dec 18 12:56:28.549 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 12:56:28.549 INFO [stderr]    |
Dec 18 12:56:28.549 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 12:56:28.549 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 12:56:28.549 INFO [stderr] 
Dec 18 12:56:28.629 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.65s
Dec 18 12:56:29.078 INFO running `"docker" "inspect" "57cbab89947da52b5a994db1e665b5304bc7558134e632c4d28a20d3f5975232"`
Dec 18 12:56:29.414 INFO running `"docker" "rm" "-f" "57cbab89947da52b5a994db1e665b5304bc7558134e632c4d28a20d3f5975232"`
Dec 18 12:56:29.664 INFO [stdout] 57cbab89947da52b5a994db1e665b5304bc7558134e632c4d28a20d3f5975232