Dec 19 21:49:15.528 INFO checking StephenAshmore/synth against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 21:49:15.528 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/StephenAshmore/synth:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 21:49:16.018 INFO [stdout] c94713e989aab38b04f90d6e56f06641d9201ba36396d3a8c62bd4cc5ccab5e2
Dec 19 21:49:16.020 INFO running `"docker" "start" "-a" "c94713e989aab38b04f90d6e56f06641d9201ba36396d3a8c62bd4cc5ccab5e2"`
Dec 19 21:49:17.572 INFO [stderr]     Checking terminal_size v0.1.7
Dec 19 21:49:17.996 INFO [stderr]     Checking synth v0.1.0 (/opt/crater/workdir)
Dec 19 21:49:18.272 INFO [stderr] warning: unused imports: `Receiver`, `Sender`
Dec 19 21:49:18.272 INFO [stderr]  --> src/main.rs:3:23
Dec 19 21:49:18.272 INFO [stderr]   |
Dec 19 21:49:18.272 INFO [stderr] 3 | use std::sync::mpsc::{Sender, Receiver};
Dec 19 21:49:18.272 INFO [stderr]   |                       ^^^^^^  ^^^^^^^^
Dec 19 21:49:18.272 INFO [stderr]   |
Dec 19 21:49:18.272 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 21:49:18.272 INFO [stderr] 
Dec 19 21:49:18.272 INFO [stderr] warning: unused import: `std::sync::mpsc`
Dec 19 21:49:18.272 INFO [stderr]  --> src/cli/interface.rs:3:5
Dec 19 21:49:18.272 INFO [stderr]   |
Dec 19 21:49:18.272 INFO [stderr] 3 | use std::sync::mpsc;
Dec 19 21:49:18.272 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 19 21:49:18.272 INFO [stderr] 
Dec 19 21:49:18.272 INFO [stderr] warning: unused import: `BufRead`
Dec 19 21:49:18.272 INFO [stderr]  --> src/cli/display.rs:1:28
Dec 19 21:49:18.272 INFO [stderr]   |
Dec 19 21:49:18.272 INFO [stderr] 1 | use std::io::{self, Write, BufRead};
Dec 19 21:49:18.272 INFO [stderr]   |                            ^^^^^^^
Dec 19 21:49:18.272 INFO [stderr] 
Dec 19 21:49:18.367 INFO [stderr] warning: unused imports: `Receiver`, `Sender`
Dec 19 21:49:18.368 INFO [stderr]  --> src/main.rs:3:23
Dec 19 21:49:18.368 INFO [stderr]   |
Dec 19 21:49:18.368 INFO [stderr] 3 | use std::sync::mpsc::{Sender, Receiver};
Dec 19 21:49:18.368 INFO [stderr]   |                       ^^^^^^  ^^^^^^^^
Dec 19 21:49:18.368 INFO [stderr]   |
Dec 19 21:49:18.368 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 21:49:18.368 INFO [stderr] 
Dec 19 21:49:18.368 INFO [stderr] warning: unused import: `std::sync::mpsc`
Dec 19 21:49:18.368 INFO [stderr]  --> src/cli/interface.rs:3:5
Dec 19 21:49:18.368 INFO [stderr]   |
Dec 19 21:49:18.368 INFO [stderr] 3 | use std::sync::mpsc;
Dec 19 21:49:18.368 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 19 21:49:18.368 INFO [stderr] 
Dec 19 21:49:18.368 INFO [stderr] warning: unused import: `BufRead`
Dec 19 21:49:18.368 INFO [stderr]  --> src/cli/display.rs:1:28
Dec 19 21:49:18.368 INFO [stderr]   |
Dec 19 21:49:18.368 INFO [stderr] 1 | use std::io::{self, Write, BufRead};
Dec 19 21:49:18.368 INFO [stderr]   |                            ^^^^^^^
Dec 19 21:49:18.368 INFO [stderr] 
Dec 19 21:49:18.388 INFO [stderr] warning: unused variable: `error`
Dec 19 21:49:18.388 INFO [stderr]   --> src/cli/display.rs:41:21
Dec 19 21:49:18.388 INFO [stderr]    |
Dec 19 21:49:18.388 INFO [stderr] 41 |                 Err(error) => String::from(""),
Dec 19 21:49:18.388 INFO [stderr]    |                     ^^^^^ help: consider using `_error` instead
Dec 19 21:49:18.388 INFO [stderr]    |
Dec 19 21:49:18.388 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 21:49:18.388 INFO [stderr] 
Dec 19 21:49:18.388 INFO [stderr] warning: unused variable: `buffer_pointer`
Dec 19 21:49:18.388 INFO [stderr]   --> src/cli/display.rs:57:17
Dec 19 21:49:18.388 INFO [stderr]    |
Dec 19 21:49:18.388 INFO [stderr] 57 |         let mut buffer_pointer = 0;
Dec 19 21:49:18.388 INFO [stderr]    |                 ^^^^^^^^^^^^^^ help: consider using `_buffer_pointer` instead
Dec 19 21:49:18.388 INFO [stderr] 
Dec 19 21:49:18.388 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:49:18.388 INFO [stderr]   --> src/main.rs:12:9
Dec 19 21:49:18.389 INFO [stderr]    |
Dec 19 21:49:18.389 INFO [stderr] 12 |     let mut user_finished = false;
Dec 19 21:49:18.389 INFO [stderr]    |         ----^^^^^^^^^^^^^
Dec 19 21:49:18.389 INFO [stderr]    |         |
Dec 19 21:49:18.389 INFO [stderr]    |         help: remove this `mut`
Dec 19 21:49:18.389 INFO [stderr]    |
Dec 19 21:49:18.389 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 21:49:18.389 INFO [stderr] 
Dec 19 21:49:18.404 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:49:18.404 INFO [stderr]   --> src/cli/display.rs:57:13
Dec 19 21:49:18.404 INFO [stderr]    |
Dec 19 21:49:18.404 INFO [stderr] 57 |         let mut buffer_pointer = 0;
Dec 19 21:49:18.404 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Dec 19 21:49:18.404 INFO [stderr]    |             |
Dec 19 21:49:18.404 INFO [stderr]    |             help: remove this `mut`
Dec 19 21:49:18.404 INFO [stderr] 
Dec 19 21:49:18.404 INFO [stderr] warning: field is never used: `m_sender`
Dec 19 21:49:18.404 INFO [stderr]  --> src/cli/interface.rs:7:5
Dec 19 21:49:18.404 INFO [stderr]   |
Dec 19 21:49:18.404 INFO [stderr] 7 |     m_sender: Sender<String>,
Dec 19 21:49:18.404 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:49:18.404 INFO [stderr]   |
Dec 19 21:49:18.404 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 21:49:18.404 INFO [stderr] 
Dec 19 21:49:18.416 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 21:49:18.416 INFO [stderr]   --> src/cli/display.rs:93:9
Dec 19 21:49:18.416 INFO [stderr]    |
Dec 19 21:49:18.416 INFO [stderr] 93 |         io::stdout().flush();
Dec 19 21:49:18.416 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:49:18.416 INFO [stderr]    |
Dec 19 21:49:18.416 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 21:49:18.416 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 21:49:18.416 INFO [stderr] 
Dec 19 21:49:18.484 INFO [stderr] warning: unused variable: `error`
Dec 19 21:49:18.484 INFO [stderr]   --> src/cli/display.rs:41:21
Dec 19 21:49:18.484 INFO [stderr]    |
Dec 19 21:49:18.484 INFO [stderr] 41 |                 Err(error) => String::from(""),
Dec 19 21:49:18.484 INFO [stderr]    |                     ^^^^^ help: consider using `_error` instead
Dec 19 21:49:18.484 INFO [stderr]    |
Dec 19 21:49:18.484 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 21:49:18.484 INFO [stderr] 
Dec 19 21:49:18.484 INFO [stderr] warning: unused variable: `buffer_pointer`
Dec 19 21:49:18.484 INFO [stderr]   --> src/cli/display.rs:57:17
Dec 19 21:49:18.484 INFO [stderr]    |
Dec 19 21:49:18.484 INFO [stderr] 57 |         let mut buffer_pointer = 0;
Dec 19 21:49:18.484 INFO [stderr]    |                 ^^^^^^^^^^^^^^ help: consider using `_buffer_pointer` instead
Dec 19 21:49:18.484 INFO [stderr] 
Dec 19 21:49:18.492 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:49:18.492 INFO [stderr]   --> src/main.rs:12:9
Dec 19 21:49:18.492 INFO [stderr]    |
Dec 19 21:49:18.492 INFO [stderr] 12 |     let mut user_finished = false;
Dec 19 21:49:18.492 INFO [stderr]    |         ----^^^^^^^^^^^^^
Dec 19 21:49:18.492 INFO [stderr]    |         |
Dec 19 21:49:18.492 INFO [stderr]    |         help: remove this `mut`
Dec 19 21:49:18.492 INFO [stderr]    |
Dec 19 21:49:18.492 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 21:49:18.492 INFO [stderr] 
Dec 19 21:49:18.512 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:49:18.512 INFO [stderr]   --> src/cli/display.rs:57:13
Dec 19 21:49:18.512 INFO [stderr]    |
Dec 19 21:49:18.512 INFO [stderr] 57 |         let mut buffer_pointer = 0;
Dec 19 21:49:18.512 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Dec 19 21:49:18.512 INFO [stderr]    |             |
Dec 19 21:49:18.512 INFO [stderr]    |             help: remove this `mut`
Dec 19 21:49:18.512 INFO [stderr] 
Dec 19 21:49:18.520 INFO [stderr] warning: field is never used: `m_sender`
Dec 19 21:49:18.520 INFO [stderr]  --> src/cli/interface.rs:7:5
Dec 19 21:49:18.520 INFO [stderr]   |
Dec 19 21:49:18.520 INFO [stderr] 7 |     m_sender: Sender<String>,
Dec 19 21:49:18.520 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:49:18.520 INFO [stderr]   |
Dec 19 21:49:18.520 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 21:49:18.520 INFO [stderr] 
Dec 19 21:49:18.533 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 21:49:18.533 INFO [stderr]   --> src/cli/display.rs:93:9
Dec 19 21:49:18.533 INFO [stderr]    |
Dec 19 21:49:18.533 INFO [stderr] 93 |         io::stdout().flush();
Dec 19 21:49:18.533 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:49:18.533 INFO [stderr]    |
Dec 19 21:49:18.533 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 21:49:18.533 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 21:49:18.533 INFO [stderr] 
Dec 19 21:49:18.578 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
Dec 19 21:49:19.308 INFO running `"docker" "inspect" "c94713e989aab38b04f90d6e56f06641d9201ba36396d3a8c62bd4cc5ccab5e2"`
Dec 19 21:49:19.540 INFO running `"docker" "rm" "-f" "c94713e989aab38b04f90d6e56f06641d9201ba36396d3a8c62bd4cc5ccab5e2"`
Dec 19 21:49:19.794 INFO [stdout] c94713e989aab38b04f90d6e56f06641d9201ba36396d3a8c62bd4cc5ccab5e2