[INFO] crate mech-program 0.0.2 is already in cache
[INFO] extracting crate mech-program 0.0.2 into work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/mech-program/0.0.2
[INFO] extracting crate mech-program 0.0.2 into work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/mech-program/0.0.2
[INFO] validating manifest of mech-program-0.0.2 on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mech-program-0.0.2 on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mech-program-0.0.2
[INFO] finished frobbing mech-program-0.0.2
[INFO] frobbed toml for mech-program-0.0.2 written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/mech-program/0.0.2/Cargo.toml
[INFO] started frobbing mech-program-0.0.2
[INFO] finished frobbing mech-program-0.0.2
[INFO] frobbed toml for mech-program-0.0.2 written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/reg/mech-program/0.0.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mech-program-0.0.2 against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-2/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/reg/mech-program/0.0.2:/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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5f0eb97da3c14ff7384e8e8b7f571407246762d5faadfe44c76ec5e0b5ad99f7
[INFO] running `"docker" "start" "-a" "5f0eb97da3c14ff7384e8e8b7f571407246762d5faadfe44c76ec5e0b5ad99f7"`
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]     Checking num-iter v0.1.39
[INFO] [stderr]     Checking num-rational v0.2.2
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking mech-core v0.0.2
[INFO] [stderr]     Checking serde_json v1.0.40
[INFO] [stderr]     Checking bincode v0.8.0
[INFO] [stderr]     Checking mech-syntax v0.0.2
[INFO] [stderr]     Checking mech-program v0.0.2 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Change`, `Core`
[INFO] [stderr]   --> src/lib.rs:18:17
[INFO] [stderr]    |
[INFO] [stderr] 18 | use mech_core::{Core, Change, Transaction, Interner};
[INFO] [stderr]    |                 ^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `mech_core::Value`
[INFO] [stderr]   --> src/lib.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use mech_core::Value;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Hasher`, `TableIndex`
[INFO] [stderr]   --> src/lib.rs:20:17
[INFO] [stderr]    |
[INFO] [stderr] 20 | use mech_core::{TableIndex, Hasher};
[INFO] [stderr]    |                 ^^^^^^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Block`, `Constraint`
[INFO] [stderr]   --> src/lib.rs:21:17
[INFO] [stderr]    |
[INFO] [stderr] 21 | use mech_core::{Block, Constraint};
[INFO] [stderr]    |                 ^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Comparator`, `Function`
[INFO] [stderr]   --> src/lib.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 | use mech_core::{Function, Comparator};
[INFO] [stderr]    |                 ^^^^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SendError`
[INFO] [stderr]  --> src/program.rs:6:41
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::sync::mpsc::{Sender, Receiver, SendError};
[INFO] [stderr]   |                                         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BTreeMap`, `Bound`
[INFO] [stderr]  --> src/program.rs:9:42
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::collections::{HashMap, HashSet, Bound, BTreeMap};
[INFO] [stderr]   |                                          ^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `canonicalize`
[INFO] [stderr]   --> src/program.rs:11:34
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::fs::{OpenOptions, File, canonicalize};
[INFO] [stderr]    |                                  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::Arc`
[INFO] [stderr]   --> src/program.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::sync::Arc;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TableIndex`
[INFO] [stderr]   --> src/program.rs:18:24
[INFO] [stderr]    |
[INFO] [stderr] 18 | use mech_core::{Table, TableIndex, Hasher};
[INFO] [stderr]    |                        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/program.rs:29:34
[INFO] [stderr]    |
[INFO] [stderr] 29 |   pub watchers: HashMap<u64, Box<Watcher + Send>>,
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Watcher + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/program.rs:289:48
[INFO] [stderr]     |
[INFO] [stderr] 289 |   pub fn attach_watcher(&mut self, watcher:Box<Watcher + Send>) {
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Watcher + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]   --> src/lib.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Change`, `Core`
[INFO] [stderr]   --> src/lib.rs:18:17
[INFO] [stderr]    |
[INFO] [stderr] 18 | use mech_core::{Core, Change, Transaction, Interner};
[INFO] [stderr]    |                 ^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `mech_core::Value`
[INFO] [stderr]   --> src/lib.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 | use mech_core::Value;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Hasher`, `TableIndex`
[INFO] [stderr]   --> src/lib.rs:20:17
[INFO] [stderr]    |
[INFO] [stderr] 20 | use mech_core::{TableIndex, Hasher};
[INFO] [stderr]    |                 ^^^^^^^^^^  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Block`, `Constraint`
[INFO] [stderr]   --> src/lib.rs:21:17
[INFO] [stderr]    |
[INFO] [stderr] 21 | use mech_core::{Block, Constraint};
[INFO] [stderr]    |                 ^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Comparator`, `Function`
[INFO] [stderr]   --> src/lib.rs:22:17
[INFO] [stderr]    |
[INFO] [stderr] 22 | use mech_core::{Function, Comparator};
[INFO] [stderr]    |                 ^^^^^^^^  ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SendError`
[INFO] [stderr]  --> src/program.rs:6:41
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::sync::mpsc::{Sender, Receiver, SendError};
[INFO] [stderr]   |                                         ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `BTreeMap`, `Bound`
[INFO] [stderr]  --> src/program.rs:9:42
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::collections::{HashMap, HashSet, Bound, BTreeMap};
[INFO] [stderr]   |                                          ^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `canonicalize`
[INFO] [stderr]   --> src/program.rs:11:34
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::fs::{OpenOptions, File, canonicalize};
[INFO] [stderr]    |                                  ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::Arc`
[INFO] [stderr]   --> src/program.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::sync::Arc;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `TableIndex`
[INFO] [stderr]   --> src/program.rs:18:24
[INFO] [stderr]    |
[INFO] [stderr] 18 | use mech_core::{Table, TableIndex, Hasher};
[INFO] [stderr]    |                        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/program.rs:29:34
[INFO] [stderr]    |
[INFO] [stderr] 29 |   pub watchers: HashMap<u64, Box<Watcher + Send>>,
[INFO] [stderr]    |                                  ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Watcher + Send`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/program.rs:289:48
[INFO] [stderr]     |
[INFO] [stderr] 289 |   pub fn attach_watcher(&mut self, watcher:Box<Watcher + Send>) {
[INFO] [stderr]     |                                                ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Watcher + Send`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `info`
[INFO] [stderr]    --> src/program.rs:220:13
[INFO] [stderr]     |
[INFO] [stderr] 220 |         Err(info) => {
[INFO] [stderr]     |             ^^^^ help: consider prefixing with an underscore: `_info`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `delta_changes`
[INFO] [stderr]    --> src/program.rs:316:17
[INFO] [stderr]     |
[INFO] [stderr] 316 |             let delta_changes = program.mech.store.len() - pre_changes;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_delta_changes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `time`
[INFO] [stderr]    --> src/program.rs:318:17
[INFO] [stderr]     |
[INFO] [stderr] 318 |             let time = (end_ns - start_ns) as f64;              
[INFO] [stderr]     |                 ^^^^ help: consider prefixing with an underscore: `_time`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `block_count`
[INFO] [stderr]    --> src/program.rs:379:17
[INFO] [stderr]     |
[INFO] [stderr] 379 |             let block_count = program.mech.runtime.blocks.len();
[INFO] [stderr]     |                 ^^^^^^^^^^^ help: consider prefixing with an underscore: `_block_count`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/program.rs:302:9
[INFO] [stderr]     |
[INFO] [stderr] 302 |     let name = self.name;
[INFO] [stderr]     |         ^^^^ help: consider prefixing with an underscore: `_name`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `info`
[INFO] [stderr]    --> src/program.rs:220:13
[INFO] [stderr]     |
[INFO] [stderr] 220 |         Err(info) => {
[INFO] [stderr]     |             ^^^^ help: consider prefixing with an underscore: `_info`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `delta_changes`
[INFO] [stderr]    --> src/program.rs:316:17
[INFO] [stderr]     |
[INFO] [stderr] 316 |             let delta_changes = program.mech.store.len() - pre_changes;
[INFO] [stderr]     |                 ^^^^^^^^^^^^^ help: consider prefixing with an underscore: `_delta_changes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `time`
[INFO] [stderr]    --> src/program.rs:318:17
[INFO] [stderr]     |
[INFO] [stderr] 318 |             let time = (end_ns - start_ns) as f64;              
[INFO] [stderr]     |                 ^^^^ help: consider prefixing with an underscore: `_time`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `block_count`
[INFO] [stderr]    --> src/program.rs:379:17
[INFO] [stderr]     |
[INFO] [stderr] 379 |             let block_count = program.mech.runtime.blocks.len();
[INFO] [stderr]     |                 ^^^^^^^^^^^ help: consider prefixing with an underscore: `_block_count`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `name`
[INFO] [stderr]    --> src/program.rs:302:9
[INFO] [stderr]     |
[INFO] [stderr] 302 |     let name = self.name;
[INFO] [stderr]     |         ^^^^ help: consider prefixing with an underscore: `_name`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/program.rs:261:9
[INFO] [stderr]     |
[INFO] [stderr] 261 |     let mut program = Program::new(name, capacity);
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `capacity`
[INFO] [stderr]   --> src/program.rs:30:3
[INFO] [stderr]    |
[INFO] [stderr] 30 |   capacity: usize,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `extern_prelude` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(extern_prelude)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/program.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     self.outgoing.send(RunLoopMessage::Transaction(txn));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/program.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     self.outgoing.send(RunLoopMessage::Transaction(txn));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:294:5
[INFO] [stderr]     |
[INFO] [stderr] 294 |     self.program.outgoing.send(RunLoopMessage::Transaction(watcher_table));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:336:13
[INFO] [stderr]     |
[INFO] [stderr] 336 |             client_outgoing.send(ClientMessage::Transaction(txn));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:345:13
[INFO] [stderr]     |
[INFO] [stderr] 345 |             client_outgoing.send(ClientMessage::Done);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:348:13
[INFO] [stderr]     |
[INFO] [stderr] 348 |             client_outgoing.send(ClientMessage::Stop);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:356:13
[INFO] [stderr]     |
[INFO] [stderr] 356 |             client_outgoing.send(table_msg);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:360:13
[INFO] [stderr]     |
[INFO] [stderr] 360 |             client_outgoing.send(ClientMessage::Pause);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:365:13
[INFO] [stderr]     |
[INFO] [stderr] 365 |             client_outgoing.send(ClientMessage::Resume);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:372:13
[INFO] [stderr]     |
[INFO] [stderr] 372 |             client_outgoing.send(ClientMessage::Time(program.mech.offset));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |             client_outgoing.send(ClientMessage::Time(program.mech.offset));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:381:13
[INFO] [stderr]     |
[INFO] [stderr] 381 |             client_outgoing.send(ClientMessage::Done);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:385:13
[INFO] [stderr]     |
[INFO] [stderr] 385 |             client_outgoing.send(ClientMessage::Clear);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:389:13
[INFO] [stderr]     |
[INFO] [stderr] 389 |             client_outgoing.send(ClientMessage::Done);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:393:13
[INFO] [stderr]     |
[INFO] [stderr] 393 |             client_outgoing.send(ClientMessage::Done);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:400:9
[INFO] [stderr]     |
[INFO] [stderr] 400 |         channel.send(PersisterMessage::Stop);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/program.rs:261:9
[INFO] [stderr]     |
[INFO] [stderr] 261 |     let mut program = Program::new(name, capacity);
[INFO] [stderr]     |         ----^^^^^^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `capacity`
[INFO] [stderr]   --> src/program.rs:30:3
[INFO] [stderr]    |
[INFO] [stderr] 30 |   capacity: usize,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `extern_prelude` has been stable since 1.30.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/lib.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(extern_prelude)]
[INFO] [stderr]   |            ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/program.rs:66:5
[INFO] [stderr]    |
[INFO] [stderr] 66 |     self.outgoing.send(RunLoopMessage::Transaction(txn));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]   --> src/program.rs:82:5
[INFO] [stderr]    |
[INFO] [stderr] 82 |     self.outgoing.send(RunLoopMessage::Transaction(txn));
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:294:5
[INFO] [stderr]     |
[INFO] [stderr] 294 |     self.program.outgoing.send(RunLoopMessage::Transaction(watcher_table));
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:336:13
[INFO] [stderr]     |
[INFO] [stderr] 336 |             client_outgoing.send(ClientMessage::Transaction(txn));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:345:13
[INFO] [stderr]     |
[INFO] [stderr] 345 |             client_outgoing.send(ClientMessage::Done);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:348:13
[INFO] [stderr]     |
[INFO] [stderr] 348 |             client_outgoing.send(ClientMessage::Stop);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:356:13
[INFO] [stderr]     |
[INFO] [stderr] 356 |             client_outgoing.send(table_msg);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:360:13
[INFO] [stderr]     |
[INFO] [stderr] 360 |             client_outgoing.send(ClientMessage::Pause);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:365:13
[INFO] [stderr]     |
[INFO] [stderr] 365 |             client_outgoing.send(ClientMessage::Resume);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:372:13
[INFO] [stderr]     |
[INFO] [stderr] 372 |             client_outgoing.send(ClientMessage::Time(program.mech.offset));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |             client_outgoing.send(ClientMessage::Time(program.mech.offset));
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:381:13
[INFO] [stderr]     |
[INFO] [stderr] 381 |             client_outgoing.send(ClientMessage::Done);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:385:13
[INFO] [stderr]     |
[INFO] [stderr] 385 |             client_outgoing.send(ClientMessage::Clear);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:389:13
[INFO] [stderr]     |
[INFO] [stderr] 389 |             client_outgoing.send(ClientMessage::Done);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:393:13
[INFO] [stderr]     |
[INFO] [stderr] 393 |             client_outgoing.send(ClientMessage::Done);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/program.rs:400:9
[INFO] [stderr]     |
[INFO] [stderr] 400 |         channel.send(PersisterMessage::Stop);
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `RunLoopMessage`, `RunLoop`
[INFO] [stderr]  --> src/bin/main.rs:2:35
[INFO] [stderr]   |
[INFO] [stderr] 2 | use mech_program::{ProgramRunner, RunLoop, RunLoopMessage};
[INFO] [stderr]   |                                   ^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `RunLoopMessage`, `RunLoop`
[INFO] [stderr]  --> src/bin/main.rs:2:35
[INFO] [stderr]   |
[INFO] [stderr] 2 | use mech_program::{ProgramRunner, RunLoop, RunLoopMessage};
[INFO] [stderr]   |                                   ^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.80s
[INFO] running `"docker" "inspect" "5f0eb97da3c14ff7384e8e8b7f571407246762d5faadfe44c76ec5e0b5ad99f7"`
[INFO] running `"docker" "rm" "-f" "5f0eb97da3c14ff7384e8e8b7f571407246762d5faadfe44c76ec5e0b5ad99f7"`
[INFO] [stdout] 5f0eb97da3c14ff7384e8e8b7f571407246762d5faadfe44c76ec5e0b5ad99f7