[INFO] cloning repository https://github.com/realaravinth/map-reduce-count-distinct
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/realaravinth/map-reduce-count-distinct" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frealaravinth%2Fmap-reduce-count-distinct", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frealaravinth%2Fmap-reduce-count-distinct'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 10c05d6667eed5517dde5ad5368f5c69c1a31f59
[INFO] checking realaravinth/map-reduce-count-distinct against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frealaravinth%2Fmap-reduce-count-distinct" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/realaravinth/map-reduce-count-distinct
[INFO] finished tweaking git repo https://github.com/realaravinth/map-reduce-count-distinct
[INFO] tweaked toml for git repo https://github.com/realaravinth/map-reduce-count-distinct written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/realaravinth/map-reduce-count-distinct on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/realaravinth/map-reduce-count-distinct 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" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ca6c978ef1f82a3ea747ce9a3b50eabb4557894161bcabb1a7981aa75d8f9ed3
[INFO] running `Command { std: "docker" "start" "-a" "ca6c978ef1f82a3ea747ce9a3b50eabb4557894161bcabb1a7981aa75d8f9ed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca6c978ef1f82a3ea747ce9a3b50eabb4557894161bcabb1a7981aa75d8f9ed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca6c978ef1f82a3ea747ce9a3b50eabb4557894161bcabb1a7981aa75d8f9ed3", kill_on_drop: false }`
[INFO] [stdout] ca6c978ef1f82a3ea747ce9a3b50eabb4557894161bcabb1a7981aa75d8f9ed3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c1c4fae010391b6b58a3ac40c3f8b8e7780c93f94dff70173670def6b9db74f4
[INFO] running `Command { std: "docker" "start" "-a" "c1c4fae010391b6b58a3ac40c3f8b8e7780c93f94dff70173670def6b9db74f4", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling syn v1.0.70
[INFO] [stderr]    Compiling memoffset v0.6.3
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking once_cell v1.7.2
[INFO] [stderr]    Compiling fs_extra v1.2.0
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking futures-core v0.3.14
[INFO] [stderr]     Checking futures-sink v0.3.14
[INFO] [stderr]    Compiling ahash v0.7.2
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking num-integer v0.1.44
[INFO] [stderr]    Compiling tokio v1.5.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking take_mut v0.2.2
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]    Compiling jemalloc-sys v0.3.2
[INFO] [stderr]     Checking futures-channel v0.3.14
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking getrandom v0.2.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking mio v0.7.11
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]     Checking dashmap v4.0.2
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking slog-async v2.6.0
[INFO] [stderr]     Checking slog-term v2.8.0
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.14
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]     Checking futures-util v0.3.14
[INFO] [stderr]     Checking futures-executor v0.3.14
[INFO] [stderr]     Checking futures v0.3.14
[INFO] [stderr]     Checking jemallocator v0.3.2
[INFO] [stderr]     Checking map-reduce v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/dash.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 86 | /         unimplemented!(
[INFO] [stdout] 87 | |             "threads aren't sharing hashmap in this version, shoud change that. Use locks perhaps"
[INFO] [stdout] 88 | |         );
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] 89 |           let map = Map::new();
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/dash.rs:89:9
[INFO] [stdout]    |
[INFO] [stdout] 86 | /         unimplemented!(
[INFO] [stdout] 87 | |             "threads aren't sharing hashmap in this version, shoud change that. Use locks perhaps"
[INFO] [stdout] 88 | |         );
[INFO] [stdout]    | |_________- any code following this expression is unreachable
[INFO] [stdout] 89 |           let map = Map::new();
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `quota` is never read
[INFO] [stdout]   --> src/dash.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub struct ParallelRunner {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 48 |     pub quota: usize,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `quota` is never read
[INFO] [stdout]   --> src/parallel.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct ParallelRunner {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 26 |     pub quota: usize,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `quota` is never read
[INFO] [stdout]   --> src/pool.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct ParallelRunner {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 20 |     pub quota: usize,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `join_handle` and `pool_tx` are never read
[INFO] [stdout]  --> src/threads.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Worker {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 7 |     pub join_handle: JoinHandle<()>,
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout] 8 |     pub tx: Option<Sender<&'static str>>,
[INFO] [stdout] 9 |     pub pool_tx: Option<Sender<(usize, Map<'static>)>>,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tx` is never read
[INFO] [stdout]   --> src/threads.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub struct ThreadPool {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 55 |     pub workers: Vec<Worker>,
[INFO] [stdout] 56 |     pub tx: Option<Sender<(usize, Map<'static>)>>,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WordPair` is never constructed
[INFO] [stdout]   --> src/utils.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct WordPair(&'static str, usize);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/utils.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl WordPair {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 57 |     #[inline]
[INFO] [stdout] 58 |     fn new(word: &'static str) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prepare_map_reduce` is never used
[INFO] [stdout]   --> src/utils.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn prepare_map_reduce() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `quota` is never read
[INFO] [stdout]   --> src/dash.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub struct ParallelRunner {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 48 |     pub quota: usize,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `quota` is never read
[INFO] [stdout]   --> src/parallel.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub struct ParallelRunner {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 26 |     pub quota: usize,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `quota` is never read
[INFO] [stdout]   --> src/pool.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct ParallelRunner {
[INFO] [stdout]    |            -------------- field in this struct
[INFO] [stdout] 20 |     pub quota: usize,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `join_handle` and `pool_tx` are never read
[INFO] [stdout]  --> src/threads.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct Worker {
[INFO] [stdout]   |            ------ fields in this struct
[INFO] [stdout] 7 |     pub join_handle: JoinHandle<()>,
[INFO] [stdout]   |         ^^^^^^^^^^^
[INFO] [stdout] 8 |     pub tx: Option<Sender<&'static str>>,
[INFO] [stdout] 9 |     pub pool_tx: Option<Sender<(usize, Map<'static>)>>,
[INFO] [stdout]   |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `tx` is never read
[INFO] [stdout]   --> src/threads.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub struct ThreadPool {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 55 |     pub workers: Vec<Worker>,
[INFO] [stdout] 56 |     pub tx: Option<Sender<(usize, Map<'static>)>>,
[INFO] [stdout]    |         ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WordPair` is never constructed
[INFO] [stdout]   --> src/utils.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct WordPair(&'static str, usize);
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/utils.rs:58:8
[INFO] [stdout]    |
[INFO] [stdout] 56 | impl WordPair {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 57 |     #[inline]
[INFO] [stdout] 58 |     fn new(word: &'static str) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `prepare_map_reduce` is never used
[INFO] [stdout]   --> src/utils.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn prepare_map_reduce() {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 22s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: fs_extra v1.2.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 6`
[INFO] running `Command { std: "docker" "inspect" "c1c4fae010391b6b58a3ac40c3f8b8e7780c93f94dff70173670def6b9db74f4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c1c4fae010391b6b58a3ac40c3f8b8e7780c93f94dff70173670def6b9db74f4", kill_on_drop: false }`
[INFO] [stdout] c1c4fae010391b6b58a3ac40c3f8b8e7780c93f94dff70173670def6b9db74f4
