[INFO] cloning repository https://github.com/avl/rust-llvm12-regression
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[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Favl%2Frust-llvm12-regression" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
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[INFO] started tweaking git repo https://github.com/avl/rust-llvm12-regression
[INFO] finished tweaking git repo https://github.com/avl/rust-llvm12-regression
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[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `time`
[INFO] [stdout]  --> src/main.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::{time, thread};
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Sender` and `TryRecvError`
[INFO] [stdout]   --> src/main.rs:12:32
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::sync::mpsc::{channel, TryRecvError, Sender};
[INFO] [stdout]    |                                ^^^^^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `#[macro_use]` import
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #[macro_use]
[INFO] [stdout]   | ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `time`
[INFO] [stdout]  --> src/main.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::{time, thread};
[INFO] [stdout]   |           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::path::Path`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::path::Path;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Sender` and `TryRecvError`
[INFO] [stdout]   --> src/main.rs:12:32
[INFO] [stdout]    |
[INFO] [stdout] 12 | use std::sync::mpsc::{channel, TryRecvError, Sender};
[INFO] [stdout]    |                                ^^^^^^^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::notify::Watcher`
[INFO] [stdout]   --> src/main.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         use self::notify::Watcher;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let mut watcher: notify::RecommendedWatcher = notify::Watcher::new(tx, Duration::from_secs(1)).unwrap();
[INFO] [stdout]    |                 ----^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `watcher`
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let mut watcher: notify::RecommendedWatcher = notify::Watcher::new(tx, Duration::from_secs(1)).unwrap();
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_watcher`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cmdtx`
[INFO] [stdout]   --> src/main.rs:23:14
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let (cmdtx, cmdrx) = channel::<Arc<Mutex<()>>>();
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_cmdtx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cmdrx`
[INFO] [stdout]   --> src/main.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let (cmdtx, cmdrx) = channel::<Arc<Mutex<()>>>();
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_cmdrx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rx`
[INFO] [stdout]   --> src/main.rs:24:18
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let (tx, rx) = channel();
[INFO] [stdout]    |                  ^^ help: if this is intentional, prefix it with an underscore: `_rx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main.rs:52:19
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn read<F, E>(size: usize, _: F) -> Result<Self::Owned, E> where F: FnOnce(&mut Self) -> Result<(), E> {
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ptr`
[INFO] [stdout]   --> src/main.rs:72:25
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn ref_from_ptr<'a>(ptr: *mut (), size: usize) -> Option<*mut Self> {
[INFO] [stdout]    |                         ^^^ help: if this is intentional, prefix it with an underscore: `_ptr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main.rs:72:39
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn ref_from_ptr<'a>(ptr: *mut (), size: usize) -> Option<*mut Self> {
[INFO] [stdout]    |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let mut watcher = TkWatcher::start();
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `watcher`
[INFO] [stdout]    --> src/main.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let mut watcher = TkWatcher::start();
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_watcher`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `agent_count`
[INFO] [stdout]    --> src/main.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let agent_count = 1;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_agent_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sender` is never read
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct TkWatcher {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 16 |     sender: Arc<RefCell<()>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TkWatcher` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `observed_heights` is never read
[INFO] [stdout]   --> src/main.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct ObservedHeight {
[INFO] [stdout]    |        -------------- field in this struct
[INFO] [stdout] 42 |     observed_heights: [f32],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `self::notify::Watcher`
[INFO] [stdout]   --> src/main.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         use self::notify::Watcher;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let mut watcher: notify::RecommendedWatcher = notify::Watcher::new(tx, Duration::from_secs(1)).unwrap();
[INFO] [stdout]    |                 ----^^^^^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `watcher`
[INFO] [stdout]   --> src/main.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let mut watcher: notify::RecommendedWatcher = notify::Watcher::new(tx, Duration::from_secs(1)).unwrap();
[INFO] [stdout]    |                 ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_watcher`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cmdtx`
[INFO] [stdout]   --> src/main.rs:23:14
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let (cmdtx, cmdrx) = channel::<Arc<Mutex<()>>>();
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_cmdtx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cmdrx`
[INFO] [stdout]   --> src/main.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let (cmdtx, cmdrx) = channel::<Arc<Mutex<()>>>();
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_cmdrx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rx`
[INFO] [stdout]   --> src/main.rs:24:18
[INFO] [stdout]    |
[INFO] [stdout] 24 |         let (tx, rx) = channel();
[INFO] [stdout]    |                  ^^ help: if this is intentional, prefix it with an underscore: `_rx`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main.rs:52:19
[INFO] [stdout]    |
[INFO] [stdout] 52 |     fn read<F, E>(size: usize, _: F) -> Result<Self::Owned, E> where F: FnOnce(&mut Self) -> Result<(), E> {
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ptr`
[INFO] [stdout]   --> src/main.rs:72:25
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn ref_from_ptr<'a>(ptr: *mut (), size: usize) -> Option<*mut Self> {
[INFO] [stdout]    |                         ^^^ help: if this is intentional, prefix it with an underscore: `_ptr`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `size`
[INFO] [stdout]   --> src/main.rs:72:39
[INFO] [stdout]    |
[INFO] [stdout] 72 |     fn ref_from_ptr<'a>(ptr: *mut (), size: usize) -> Option<*mut Self> {
[INFO] [stdout]    |                                       ^^^^ help: if this is intentional, prefix it with an underscore: `_size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let mut watcher = TkWatcher::start();
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `watcher`
[INFO] [stdout]    --> src/main.rs:105:9
[INFO] [stdout]     |
[INFO] [stdout] 105 |     let mut watcher = TkWatcher::start();
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_watcher`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `agent_count`
[INFO] [stdout]    --> src/main.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 106 |     let agent_count = 1;
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_agent_count`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sender` is never read
[INFO] [stdout]   --> src/main.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct TkWatcher {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 16 |     sender: Arc<RefCell<()>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TkWatcher` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `observed_heights` is never read
[INFO] [stdout]   --> src/main.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 41 | struct ObservedHeight {
[INFO] [stdout]    |        -------------- field in this struct
[INFO] [stdout] 42 |     observed_heights: [f32],
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `&ObservedHeight` does not permit zero-initialization
[INFO] [stdout]   --> src/main.rs:59:50
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let fake_ptr: &ObservedHeight = unsafe { mem::transmute((0usize, 0usize)) };
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                                                  |
[INFO] [stdout]    |                                                  this code causes undefined behavior when executed
[INFO] [stdout]    |                                                  help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]    |
[INFO] [stdout]    = note: references must be non-null
[INFO] [stdout]    = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `&ObservedHeight` does not permit zero-initialization
[INFO] [stdout]   --> src/main.rs:81:50
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let fake_ptr: &ObservedHeight = unsafe { mem::transmute((0usize, 0usize)) };
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                                                  |
[INFO] [stdout]    |                                                  this code causes undefined behavior when executed
[INFO] [stdout]    |                                                  help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]    |
[INFO] [stdout]    = note: references must be non-null
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `&ObservedHeight` does not permit zero-initialization
[INFO] [stdout]   --> src/main.rs:59:50
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let fake_ptr: &ObservedHeight = unsafe { mem::transmute((0usize, 0usize)) };
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                                                  |
[INFO] [stdout]    |                                                  this code causes undefined behavior when executed
[INFO] [stdout]    |                                                  help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]    |
[INFO] [stdout]    = note: references must be non-null
[INFO] [stdout]    = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the type `&ObservedHeight` does not permit zero-initialization
[INFO] [stdout]   --> src/main.rs:81:50
[INFO] [stdout]    |
[INFO] [stdout] 81 |         let fake_ptr: &ObservedHeight = unsafe { mem::transmute((0usize, 0usize)) };
[INFO] [stdout]    |                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                                                  |
[INFO] [stdout]    |                                                  this code causes undefined behavior when executed
[INFO] [stdout]    |                                                  help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]    |
[INFO] [stdout]    = note: references must be non-null
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 53.44s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v6.2.1
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 5`
[INFO] running `Command { std: "docker" "inspect" "81c459fcd161d900feb85abbe05a68b18bc07f33b76e9bf569723c950757234b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81c459fcd161d900feb85abbe05a68b18bc07f33b76e9bf569723c950757234b", kill_on_drop: false }`
[INFO] [stdout] 81c459fcd161d900feb85abbe05a68b18bc07f33b76e9bf569723c950757234b
