Dec 18 05:21:29.224 INFO checking StephenAshmore/synth against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 05:21:29.225 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 05:21:29.553 INFO [stdout] 20564044ded8bbe78b0a3104b4c553fb392ad2706b7e3a1559786ce2fefcb9cc
Dec 18 05:21:29.557 INFO running `"docker" "start" "-a" "20564044ded8bbe78b0a3104b4c553fb392ad2706b7e3a1559786ce2fefcb9cc"`
Dec 18 05:21:30.603 INFO [stderr]     Checking terminal_size v0.1.7
Dec 18 05:21:30.861 INFO [stderr]     Checking synth v0.1.0 (/opt/crater/workdir)
Dec 18 05:21:31.097 INFO [stderr] warning: unused imports: `Receiver`, `Sender`
Dec 18 05:21:31.098 INFO [stderr]  --> src/main.rs:3:23
Dec 18 05:21:31.098 INFO [stderr]   |
Dec 18 05:21:31.098 INFO [stderr] 3 | use std::sync::mpsc::{Sender, Receiver};
Dec 18 05:21:31.098 INFO [stderr]   |                       ^^^^^^  ^^^^^^^^
Dec 18 05:21:31.098 INFO [stderr]   |
Dec 18 05:21:31.098 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 05:21:31.098 INFO [stderr] 
Dec 18 05:21:31.098 INFO [stderr] warning: unused import: `std::sync::mpsc`
Dec 18 05:21:31.098 INFO [stderr]  --> src/cli/interface.rs:3:5
Dec 18 05:21:31.098 INFO [stderr]   |
Dec 18 05:21:31.098 INFO [stderr] 3 | use std::sync::mpsc;
Dec 18 05:21:31.098 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 18 05:21:31.098 INFO [stderr] 
Dec 18 05:21:31.098 INFO [stderr] warning: unused import: `BufRead`
Dec 18 05:21:31.098 INFO [stderr]  --> src/cli/display.rs:1:28
Dec 18 05:21:31.098 INFO [stderr]   |
Dec 18 05:21:31.098 INFO [stderr] 1 | use std::io::{self, Write, BufRead};
Dec 18 05:21:31.098 INFO [stderr]   |                            ^^^^^^^
Dec 18 05:21:31.098 INFO [stderr] 
Dec 18 05:21:31.172 INFO [stderr] warning: unused variable: `error`
Dec 18 05:21:31.172 INFO [stderr]   --> src/cli/display.rs:41:21
Dec 18 05:21:31.172 INFO [stderr]    |
Dec 18 05:21:31.172 INFO [stderr] 41 |                 Err(error) => String::from(""),
Dec 18 05:21:31.172 INFO [stderr]    |                     ^^^^^ help: consider using `_error` instead
Dec 18 05:21:31.172 INFO [stderr]    |
Dec 18 05:21:31.172 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 05:21:31.172 INFO [stderr] 
Dec 18 05:21:31.172 INFO [stderr] warning: unused variable: `buffer_pointer`
Dec 18 05:21:31.172 INFO [stderr]   --> src/cli/display.rs:57:17
Dec 18 05:21:31.172 INFO [stderr]    |
Dec 18 05:21:31.172 INFO [stderr] 57 |         let mut buffer_pointer = 0;
Dec 18 05:21:31.172 INFO [stderr]    |                 ^^^^^^^^^^^^^^ help: consider using `_buffer_pointer` instead
Dec 18 05:21:31.172 INFO [stderr] 
Dec 18 05:21:31.172 INFO [stderr] warning: variable does not need to be mutable
Dec 18 05:21:31.172 INFO [stderr]   --> src/main.rs:12:9
Dec 18 05:21:31.172 INFO [stderr]    |
Dec 18 05:21:31.172 INFO [stderr] 12 |     let mut user_finished = false;
Dec 18 05:21:31.172 INFO [stderr]    |         ----^^^^^^^^^^^^^
Dec 18 05:21:31.172 INFO [stderr]    |         |
Dec 18 05:21:31.172 INFO [stderr]    |         help: remove this `mut`
Dec 18 05:21:31.172 INFO [stderr] warning: unused imports: `Receiver`, `Sender`
Dec 18 05:21:31.172 INFO [stderr]  --> src/main.rs:3:23
Dec 18 05:21:31.172 INFO [stderr]   |
Dec 18 05:21:31.172 INFO [stderr] 3 | use std::sync::mpsc::{Sender, Receiver};
Dec 18 05:21:31.172 INFO [stderr]   |                       ^^^^^^  ^^^^^^^^
Dec 18 05:21:31.172 INFO [stderr]   |
Dec 18 05:21:31.172 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 05:21:31.172 INFO [stderr] 
Dec 18 05:21:31.172 INFO [stderr] warning: unused import: `std::sync::mpsc`
Dec 18 05:21:31.172 INFO [stderr]  --> src/cli/interface.rs:3:5
Dec 18 05:21:31.172 INFO [stderr]   |
Dec 18 05:21:31.172 INFO [stderr] 3 | use std::sync::mpsc;
Dec 18 05:21:31.172 INFO [stderr]   |     ^^^^^^^^^^^^^^^
Dec 18 05:21:31.172 INFO [stderr] 
Dec 18 05:21:31.172 INFO [stderr] warning: unused import: `BufRead`
Dec 18 05:21:31.172 INFO [stderr]  --> src/cli/display.rs:1:28
Dec 18 05:21:31.172 INFO [stderr]   |
Dec 18 05:21:31.172 INFO [stderr] 1 | use std::io::{self, Write, BufRead};
Dec 18 05:21:31.172 INFO [stderr]   |                            ^^^^^^^
Dec 18 05:21:31.172 INFO [stderr] 
Dec 18 05:21:31.172 INFO [stderr]    |
Dec 18 05:21:31.172 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 05:21:31.172 INFO [stderr] 
Dec 18 05:21:31.188 INFO [stderr] warning: variable does not need to be mutable
Dec 18 05:21:31.188 INFO [stderr]   --> src/cli/display.rs:57:13
Dec 18 05:21:31.188 INFO [stderr]    |
Dec 18 05:21:31.188 INFO [stderr] 57 |         let mut buffer_pointer = 0;
Dec 18 05:21:31.188 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Dec 18 05:21:31.188 INFO [stderr]    |             |
Dec 18 05:21:31.188 INFO [stderr]    |             help: remove this `mut`
Dec 18 05:21:31.188 INFO [stderr] 
Dec 18 05:21:31.193 INFO [stderr] warning: field is never used: `m_sender`
Dec 18 05:21:31.193 INFO [stderr]  --> src/cli/interface.rs:7:5
Dec 18 05:21:31.193 INFO [stderr]   |
Dec 18 05:21:31.193 INFO [stderr] 7 |     m_sender: Sender<String>,
Dec 18 05:21:31.193 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:21:31.200 INFO [stderr]   |
Dec 18 05:21:31.200 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 05:21:31.200 INFO [stderr] 
Dec 18 05:21:31.208 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 05:21:31.208 INFO [stderr]   --> src/cli/display.rs:93:9
Dec 18 05:21:31.208 INFO [stderr]    |
Dec 18 05:21:31.208 INFO [stderr] 93 |         io::stdout().flush();
Dec 18 05:21:31.208 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:21:31.208 INFO [stderr]    |
Dec 18 05:21:31.208 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 05:21:31.208 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 05:21:31.208 INFO [stderr] 
Dec 18 05:21:31.220 INFO [stderr] warning: unused variable: `error`
Dec 18 05:21:31.220 INFO [stderr]   --> src/cli/display.rs:41:21
Dec 18 05:21:31.220 INFO [stderr]    |
Dec 18 05:21:31.220 INFO [stderr] 41 |                 Err(error) => String::from(""),
Dec 18 05:21:31.220 INFO [stderr]    |                     ^^^^^ help: consider using `_error` instead
Dec 18 05:21:31.220 INFO [stderr]    |
Dec 18 05:21:31.220 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 05:21:31.220 INFO [stderr] 
Dec 18 05:21:31.220 INFO [stderr] warning: unused variable: `buffer_pointer`
Dec 18 05:21:31.220 INFO [stderr]   --> src/cli/display.rs:57:17
Dec 18 05:21:31.220 INFO [stderr]    |
Dec 18 05:21:31.220 INFO [stderr] 57 |         let mut buffer_pointer = 0;
Dec 18 05:21:31.220 INFO [stderr]    |                 ^^^^^^^^^^^^^^ help: consider using `_buffer_pointer` instead
Dec 18 05:21:31.220 INFO [stderr] 
Dec 18 05:21:31.225 INFO [stderr] warning: variable does not need to be mutable
Dec 18 05:21:31.225 INFO [stderr]   --> src/main.rs:12:9
Dec 18 05:21:31.225 INFO [stderr]    |
Dec 18 05:21:31.225 INFO [stderr] 12 |     let mut user_finished = false;
Dec 18 05:21:31.225 INFO [stderr]    |         ----^^^^^^^^^^^^^
Dec 18 05:21:31.225 INFO [stderr]    |         |
Dec 18 05:21:31.225 INFO [stderr]    |         help: remove this `mut`
Dec 18 05:21:31.225 INFO [stderr]    |
Dec 18 05:21:31.225 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 05:21:31.225 INFO [stderr] 
Dec 18 05:21:31.235 INFO [stderr] warning: variable does not need to be mutable
Dec 18 05:21:31.235 INFO [stderr]   --> src/cli/display.rs:57:13
Dec 18 05:21:31.235 INFO [stderr]    |
Dec 18 05:21:31.235 INFO [stderr] 57 |         let mut buffer_pointer = 0;
Dec 18 05:21:31.235 INFO [stderr]    |             ----^^^^^^^^^^^^^^
Dec 18 05:21:31.235 INFO [stderr]    |             |
Dec 18 05:21:31.235 INFO [stderr]    |             help: remove this `mut`
Dec 18 05:21:31.235 INFO [stderr] 
Dec 18 05:21:31.238 INFO [stderr] warning: field is never used: `m_sender`
Dec 18 05:21:31.238 INFO [stderr]  --> src/cli/interface.rs:7:5
Dec 18 05:21:31.238 INFO [stderr]   |
Dec 18 05:21:31.238 INFO [stderr] 7 |     m_sender: Sender<String>,
Dec 18 05:21:31.239 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:21:31.239 INFO [stderr]   |
Dec 18 05:21:31.239 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 05:21:31.239 INFO [stderr] 
Dec 18 05:21:31.248 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 05:21:31.248 INFO [stderr]   --> src/cli/display.rs:93:9
Dec 18 05:21:31.248 INFO [stderr]    |
Dec 18 05:21:31.248 INFO [stderr] 93 |         io::stdout().flush();
Dec 18 05:21:31.248 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:21:31.248 INFO [stderr]    |
Dec 18 05:21:31.248 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 05:21:31.248 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 05:21:31.248 INFO [stderr] 
Dec 18 05:21:31.282 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
Dec 18 05:21:31.638 INFO running `"docker" "inspect" "20564044ded8bbe78b0a3104b4c553fb392ad2706b7e3a1559786ce2fefcb9cc"`
Dec 18 05:21:31.721 INFO running `"docker" "rm" "-f" "20564044ded8bbe78b0a3104b4c553fb392ad2706b7e3a1559786ce2fefcb9cc"`
Dec 18 05:21:31.858 INFO [stdout] 20564044ded8bbe78b0a3104b4c553fb392ad2706b7e3a1559786ce2fefcb9cc