[INFO] cloning repository https://github.com/mxhold/histogramify
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mxhold/histogramify" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxhold%2Fhistogramify", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxhold%2Fhistogramify'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 318a01d41ff12eaadf7c5e3f4e7c59bf6628693e
[INFO] testing mxhold/histogramify against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmxhold%2Fhistogramify" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mxhold/histogramify
[INFO] finished tweaking git repo https://github.com/mxhold/histogramify
[INFO] tweaked toml for git repo https://github.com/mxhold/histogramify written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mxhold/histogramify on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mxhold/histogramify already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c244826fe002a1852ad7464f3d272a333cc709d44343adae686136be36d80be1
[INFO] running `Command { std: "docker" "start" "-a" "c244826fe002a1852ad7464f3d272a333cc709d44343adae686136be36d80be1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c244826fe002a1852ad7464f3d272a333cc709d44343adae686136be36d80be1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c244826fe002a1852ad7464f3d272a333cc709d44343adae686136be36d80be1", kill_on_drop: false }`
[INFO] [stdout] c244826fe002a1852ad7464f3d272a333cc709d44343adae686136be36d80be1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e9a116e7ef6ffce60c17d3959f6661b2e8d09669a314e42d1ddd8046a97c70d
[INFO] running `Command { std: "docker" "start" "-a" "2e9a116e7ef6ffce60c17d3959f6661b2e8d09669a314e42d1ddd8046a97c70d", kill_on_drop: false }`
[INFO] [stderr]    Compiling histogramify v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut word_frequencies: Arc<Mutex<HashMap<&str, u32>>> = Arc::new(Mutex::new(HashMap::new()));
[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] error[E0597]: `words` does not live long enough
[INFO] [stdout]   --> src/main.rs:20:29
[INFO] [stdout]    |
[INFO] [stdout] 17 |   fn word_frequencies(words: Vec<&str>) -> HashMap<&str, u32> {
[INFO] [stdout]    |                       ----- binding `words` declared here
[INFO] [stdout] ...
[INFO] [stdout] 20 |       let words_for_threads = words.chunks(words.len() / THREADS as usize);
[INFO] [stdout]    |                               ^^^^^ borrowed value does not live long enough
[INFO] [stdout] ...
[INFO] [stdout] 23 |           let handle = thread::spawn(move || {
[INFO] [stdout]    |  ______________________-
[INFO] [stdout] 24 | |             for word in words {
[INFO] [stdout] 25 | |                 word_frequencies
[INFO] [stdout] 26 | |                     .lock()
[INFO] [stdout] ...  |
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |__________- argument requires that `words` is borrowed for `'static`
[INFO] [stdout] ...
[INFO] [stdout] 41 |   }
[INFO] [stdout]    |   - `words` dropped here while still borrowed
[INFO] [stdout]    |
[INFO] [stdout] note: requirement that the value outlives `'static` introduced here
[INFO] [stdout]   --> /rustc/c2e32f1c9652b13ed99608599c1e855462f421f3/library/std/src/thread/mod.rs:728:14
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0521]: borrowed data escapes outside of function
[INFO] [stdout]   --> src/main.rs:23:22
[INFO] [stdout]    |
[INFO] [stdout] 17 |   fn word_frequencies(words: Vec<&str>) -> HashMap<&str, u32> {
[INFO] [stdout]    |                       -----      - let's call the lifetime of this reference `'1`
[INFO] [stdout]    |                       |
[INFO] [stdout]    |                       `words` is a reference that is only valid in the function body
[INFO] [stdout] ...
[INFO] [stdout] 23 |           let handle = thread::spawn(move || {
[INFO] [stdout]    |  ______________________^
[INFO] [stdout] 24 | |             for word in words {
[INFO] [stdout] 25 | |                 word_frequencies
[INFO] [stdout] 26 | |                     .lock()
[INFO] [stdout] ...  |
[INFO] [stdout] 32 | |         });
[INFO] [stdout]    | |          ^
[INFO] [stdout]    | |          |
[INFO] [stdout]    | |__________`words` escapes the function body here
[INFO] [stdout]    |            argument requires that `'1` must outlive `'static`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0507]: cannot move out of dereference of `std::sync::MutexGuard<'_, HashMap<&str, u32>>`
[INFO] [stdout]   --> src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 40 |     *word_frequencies.lock().unwrap()
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ move occurs because value has type `HashMap<&str, u32>`, which does not implement the `Copy` trait
[INFO] [stdout]    |
[INFO] [stdout] help: consider cloning the value if the performance cost is acceptable
[INFO] [stdout]    |
[INFO] [stdout] 40 -     *word_frequencies.lock().unwrap()
[INFO] [stdout] 40 +     word_frequencies.lock().unwrap().clone()
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0597]: `word_frequencies` does not live long enough
[INFO] [stdout]   --> src/main.rs:40:6
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let mut word_frequencies: Arc<Mutex<HashMap<&str, u32>>> = Arc::new(Mutex::new(HashMap::new()));
[INFO] [stdout]    |         -------------------- binding `word_frequencies` declared here
[INFO] [stdout] ...
[INFO] [stdout] 40 |     *word_frequencies.lock().unwrap()
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^----------------
[INFO] [stdout]    |      |
[INFO] [stdout]    |      borrowed value does not live long enough
[INFO] [stdout]    |      a temporary with access to the borrow is created here ...
[INFO] [stdout] 41 | }
[INFO] [stdout]    | -
[INFO] [stdout]    | |
[INFO] [stdout]    | `word_frequencies` dropped here while still borrowed
[INFO] [stdout]    | ... and the borrow might be used here, when that temporary is dropped and runs the `Drop` code for type `std::sync::MutexGuard`
[INFO] [stdout]    |
[INFO] [stdout]    = note: the temporary is part of an expression at the end of a block;
[INFO] [stdout]            consider forcing this temporary to be dropped sooner, before the block's local variables are dropped
[INFO] [stdout] help: for example, you could save the expression's value in a new local variable `x` and then make `x` be the expression at the end of the block
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let x = *word_frequencies.lock().unwrap(); x
[INFO] [stdout]    |     +++++++                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0507, E0521, E0597.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0507`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `histogramify` (bin "histogramify") due to 4 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "2e9a116e7ef6ffce60c17d3959f6661b2e8d09669a314e42d1ddd8046a97c70d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e9a116e7ef6ffce60c17d3959f6661b2e8d09669a314e42d1ddd8046a97c70d", kill_on_drop: false }`
[INFO] [stdout] 2e9a116e7ef6ffce60c17d3959f6661b2e8d09669a314e42d1ddd8046a97c70d
