Dec 19 21:24:11.577 INFO checking VoxWave/Compilers2018 against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 21:24:11.577 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/VoxWave/Compilers2018:/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 21:24:12.068 INFO [stdout] 961464784fd4ccc33baf0aba2173cc3b62cf91e8d0f740adde650f8bc15b8a9f
Dec 19 21:24:12.074 INFO running `"docker" "start" "-a" "961464784fd4ccc33baf0aba2173cc3b62cf91e8d0f740adde650f8bc15b8a9f"`
Dec 19 21:24:13.536 INFO [stderr]     Checking char_stream v0.1.8
Dec 19 21:24:13.540 INFO [stderr]     Checking num-complex v0.1.43
Dec 19 21:24:13.548 INFO [stderr]     Checking num-bigint v0.1.43
Dec 19 21:24:13.548 INFO [stderr]     Checking rayon-core v1.4.0
Dec 19 21:24:15.044 INFO [stderr]     Checking rayon v1.0.1
Dec 19 21:24:16.548 INFO [stderr]     Checking num-rational v0.1.42
Dec 19 21:24:17.507 INFO [stderr]     Checking num v0.1.42
Dec 19 21:24:18.957 INFO [stderr]     Checking minipl-compiler v0.1.0 (/opt/crater/workdir)
Dec 19 21:24:19.630 INFO [stderr] warning: unused import: `std::sync::mpsc::Sender`
Dec 19 21:24:19.630 INFO [stderr]  --> src/main.rs:7:5
Dec 19 21:24:19.630 INFO [stderr]   |
Dec 19 21:24:19.630 INFO [stderr] 7 | use std::sync::mpsc::Sender;
Dec 19 21:24:19.630 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:19.630 INFO [stderr]   |
Dec 19 21:24:19.630 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 21:24:19.630 INFO [stderr] 
Dec 19 21:24:19.630 INFO [stderr] warning: unused import: `std::sync::mpsc::Receiver`
Dec 19 21:24:19.630 INFO [stderr]  --> src/main.rs:8:5
Dec 19 21:24:19.630 INFO [stderr]   |
Dec 19 21:24:19.630 INFO [stderr] 8 | use std::sync::mpsc::Receiver;
Dec 19 21:24:19.630 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:19.630 INFO [stderr] 
Dec 19 21:24:19.630 INFO [stderr] warning: unused import: `std::process::abort`
Dec 19 21:24:19.630 INFO [stderr]   --> src/main.rs:10:5
Dec 19 21:24:19.630 INFO [stderr]    |
Dec 19 21:24:19.630 INFO [stderr] 10 | use std::process::abort;
Dec 19 21:24:19.630 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:19.630 INFO [stderr] 
Dec 19 21:24:19.668 INFO [stderr] warning: unused import: `std::sync::mpsc::Sender`
Dec 19 21:24:19.668 INFO [stderr]  --> src/main.rs:7:5
Dec 19 21:24:19.668 INFO [stderr]   |
Dec 19 21:24:19.668 INFO [stderr] 7 | use std::sync::mpsc::Sender;
Dec 19 21:24:19.668 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:19.668 INFO [stderr]   |
Dec 19 21:24:19.668 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 21:24:19.668 INFO [stderr] 
Dec 19 21:24:19.668 INFO [stderr] warning: unused import: `std::sync::mpsc::Receiver`
Dec 19 21:24:19.668 INFO [stderr]  --> src/main.rs:8:5
Dec 19 21:24:19.668 INFO [stderr]   |
Dec 19 21:24:19.668 INFO [stderr] 8 | use std::sync::mpsc::Receiver;
Dec 19 21:24:19.668 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:19.668 INFO [stderr] 
Dec 19 21:24:19.668 INFO [stderr] warning: unused import: `std::process::abort`
Dec 19 21:24:19.668 INFO [stderr]   --> src/main.rs:10:5
Dec 19 21:24:19.668 INFO [stderr]    |
Dec 19 21:24:19.668 INFO [stderr] 10 | use std::process::abort;
Dec 19 21:24:19.668 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:19.668 INFO [stderr] 
Dec 19 21:24:20.157 INFO [stderr] warning: unreachable pattern
Dec 19 21:24:20.157 INFO [stderr]    --> src/parser/mod.rs:255:17
Dec 19 21:24:20.157 INFO [stderr]     |
Dec 19 21:24:20.157 INFO [stderr] 255 |                 _ => panic!("unexpected Token {:#?} read during", t),
Dec 19 21:24:20.157 INFO [stderr]     |                 ^
Dec 19 21:24:20.157 INFO [stderr]     |
Dec 19 21:24:20.157 INFO [stderr]     = note: #[warn(unreachable_patterns)] on by default
Dec 19 21:24:20.157 INFO [stderr] 
Dec 19 21:24:20.157 INFO [stderr] warning: unused variable: `b`
Dec 19 21:24:20.157 INFO [stderr]    --> src/interpreter.rs:207:33
Dec 19 21:24:20.157 INFO [stderr]     |
Dec 19 21:24:20.157 INFO [stderr] 207 |                     Value::Bool(b) => panic!("boolean printing is not supported"),
Dec 19 21:24:20.157 INFO [stderr]     |                                 ^ help: consider using `_b` instead
Dec 19 21:24:20.157 INFO [stderr]     |
Dec 19 21:24:20.157 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 21:24:20.157 INFO [stderr] 
Dec 19 21:24:20.164 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:24:20.164 INFO [stderr]   --> src/main.rs:29:10
Dec 19 21:24:20.165 INFO [stderr]    |
Dec 19 21:24:20.165 INFO [stderr] 29 |     let (mut kill_switch, mut kill_signal) = channel();
Dec 19 21:24:20.165 INFO [stderr]    |          ----^^^^^^^^^^^
Dec 19 21:24:20.165 INFO [stderr]    |          |
Dec 19 21:24:20.165 INFO [stderr]    |          help: remove this `mut`
Dec 19 21:24:20.165 INFO [stderr]    |
Dec 19 21:24:20.165 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 21:24:20.165 INFO [stderr] 
Dec 19 21:24:20.165 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:24:20.165 INFO [stderr]   --> src/main.rs:29:27
Dec 19 21:24:20.165 INFO [stderr]    |
Dec 19 21:24:20.165 INFO [stderr] 29 |     let (mut kill_switch, mut kill_signal) = channel();
Dec 19 21:24:20.165 INFO [stderr]    |                           ----^^^^^^^^^^^
Dec 19 21:24:20.165 INFO [stderr]    |                           |
Dec 19 21:24:20.165 INFO [stderr]    |                           help: remove this `mut`
Dec 19 21:24:20.165 INFO [stderr] 
Dec 19 21:24:20.168 INFO [stderr] warning: unreachable pattern
Dec 19 21:24:20.168 INFO [stderr]    --> src/parser/mod.rs:255:17
Dec 19 21:24:20.168 INFO [stderr]     |
Dec 19 21:24:20.168 INFO [stderr] 255 |                 _ => panic!("unexpected Token {:#?} read during", t),
Dec 19 21:24:20.168 INFO [stderr]     |                 ^
Dec 19 21:24:20.168 INFO [stderr]     |
Dec 19 21:24:20.168 INFO [stderr]     = note: #[warn(unreachable_patterns)] on by default
Dec 19 21:24:20.168 INFO [stderr] 
Dec 19 21:24:20.176 INFO [stderr] warning: unused variable: `b`
Dec 19 21:24:20.176 INFO [stderr]    --> src/interpreter.rs:207:33
Dec 19 21:24:20.176 INFO [stderr]     |
Dec 19 21:24:20.176 INFO [stderr] 207 |                     Value::Bool(b) => panic!("boolean printing is not supported"),
Dec 19 21:24:20.176 INFO [stderr]     |                                 ^ help: consider using `_b` instead
Dec 19 21:24:20.176 INFO [stderr]     |
Dec 19 21:24:20.176 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 19 21:24:20.176 INFO [stderr] 
Dec 19 21:24:20.188 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:24:20.188 INFO [stderr]   --> src/main.rs:29:27
Dec 19 21:24:20.188 INFO [stderr]    |
Dec 19 21:24:20.188 INFO [stderr] 29 |     let (mut kill_switch, mut kill_signal) = channel();
Dec 19 21:24:20.188 INFO [stderr]    |                           ----^^^^^^^^^^^
Dec 19 21:24:20.188 INFO [stderr]    |                           |
Dec 19 21:24:20.188 INFO [stderr]    |                           help: remove this `mut`
Dec 19 21:24:20.188 INFO [stderr]    |
Dec 19 21:24:20.188 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 21:24:20.188 INFO [stderr] 
Dec 19 21:24:20.189 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:24:20.189 INFO [stderr]   --> src/main.rs:29:10
Dec 19 21:24:20.189 INFO [stderr]    |
Dec 19 21:24:20.189 INFO [stderr] 29 |     let (mut kill_switch, mut kill_signal) = channel();
Dec 19 21:24:20.189 INFO [stderr]    |          ----^^^^^^^^^^^
Dec 19 21:24:20.189 INFO [stderr]    |          |
Dec 19 21:24:20.189 INFO [stderr]    |          help: remove this `mut`
Dec 19 21:24:20.189 INFO [stderr] 
Dec 19 21:24:20.284 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 21:24:20.284 INFO [stderr]   --> src/main.rs:41:9
Dec 19 21:24:20.284 INFO [stderr]    |
Dec 19 21:24:20.284 INFO [stderr] 41 |         kill_switch.send(true);
Dec 19 21:24:20.284 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:20.284 INFO [stderr]    |
Dec 19 21:24:20.284 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 21:24:20.284 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 21:24:20.284 INFO [stderr] 
Dec 19 21:24:20.284 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 21:24:20.284 INFO [stderr]   --> src/main.rs:43:5
Dec 19 21:24:20.284 INFO [stderr]    |
Dec 19 21:24:20.284 INFO [stderr] 43 |     kill_signal.recv();
Dec 19 21:24:20.284 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:20.284 INFO [stderr]    |
Dec 19 21:24:20.284 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 21:24:20.284 INFO [stderr] 
Dec 19 21:24:20.377 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:24:20.377 INFO [stderr]   --> src/parser/test.rs:20:9
Dec 19 21:24:20.377 INFO [stderr]    |
Dec 19 21:24:20.377 INFO [stderr] 20 |     let mut expected: VecDeque<_> = vec![
Dec 19 21:24:20.377 INFO [stderr]    |         ----^^^^^^^^
Dec 19 21:24:20.377 INFO [stderr]    |         |
Dec 19 21:24:20.377 INFO [stderr]    |         help: remove this `mut`
Dec 19 21:24:20.377 INFO [stderr] 
Dec 19 21:24:20.388 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 21:24:20.388 INFO [stderr]   --> src/main.rs:41:9
Dec 19 21:24:20.388 INFO [stderr]    |
Dec 19 21:24:20.388 INFO [stderr] 41 |         kill_switch.send(true);
Dec 19 21:24:20.388 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:20.388 INFO [stderr]    |
Dec 19 21:24:20.388 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 21:24:20.388 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 21:24:20.388 INFO [stderr] 
Dec 19 21:24:20.388 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 21:24:20.388 INFO [stderr]   --> src/main.rs:43:5
Dec 19 21:24:20.388 INFO [stderr]    |
Dec 19 21:24:20.388 INFO [stderr] 43 |     kill_signal.recv();
Dec 19 21:24:20.388 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^
Dec 19 21:24:20.388 INFO [stderr]    |
Dec 19 21:24:20.388 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 21:24:20.388 INFO [stderr] 
Dec 19 21:24:20.437 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.00s
Dec 19 21:24:21.156 INFO running `"docker" "inspect" "961464784fd4ccc33baf0aba2173cc3b62cf91e8d0f740adde650f8bc15b8a9f"`
Dec 19 21:24:21.521 INFO running `"docker" "rm" "-f" "961464784fd4ccc33baf0aba2173cc3b62cf91e8d0f740adde650f8bc15b8a9f"`
Dec 19 21:24:21.771 INFO [stdout] 961464784fd4ccc33baf0aba2173cc3b62cf91e8d0f740adde650f8bc15b8a9f