[INFO] cloning repository https://github.com/michaelrauh/fold
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michaelrauh/fold" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelrauh%2Ffold", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelrauh%2Ffold'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0a015214f9775049cb50f8f6260c85ea3aadb346
[INFO] checking michaelrauh/fold against try#ed606620234c6b50f2414162c4bbabd5f4a925f3 for pr-147995
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelrauh%2Ffold" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/michaelrauh/fold
[INFO] finished tweaking git repo https://github.com/michaelrauh/fold
[INFO] tweaked toml for git repo https://github.com/michaelrauh/fold written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/michaelrauh/fold on toolchain ed606620234c6b50f2414162c4bbabd5f4a925f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/michaelrauh/fold 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" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "start" "-a" "0174dfeb38c23b7303e2a8a94383da801901fb2f0d35e941c109c9d2ff7105ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0174dfeb38c23b7303e2a8a94383da801901fb2f0d35e941c109c9d2ff7105ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0174dfeb38c23b7303e2a8a94383da801901fb2f0d35e941c109c9d2ff7105ef", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
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[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/interner.rs:79:17
[INFO] [stdout]    |
[INFO] [stdout] 79 |             let mut interner = Interner {
[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: value assigned to `first` is never read
[INFO] [stdout]    --> src/interner.rs:218:63
[INFO] [stdout]     |
[INFO] [stdout] 218 |                     if first { /* intersection stays empty */ first = false; }
[INFO] [stdout]     |                                                               ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/interner.rs:79:17
[INFO] [stdout]    |
[INFO] [stdout] 79 |             let mut interner = Interner {
[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: value assigned to `first` is never read
[INFO] [stdout]    --> src/interner.rs:218:63
[INFO] [stdout]     |
[INFO] [stdout] 218 |                     if first { /* intersection stays empty */ first = false; }
[INFO] [stdout]     |                                                               ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index_to_location` is never read
[INFO] [stdout]   --> src/spatial.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | struct DimMeta {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 14 |     index_to_location: FxHashMap<usize, Vec<usize>>, // index -> location coord
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `cumulative_bumped` is assigned to, but never used
[INFO] [stdout]   --> src/bin/follower.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut cumulative_bumped: usize = 0; // retained if needed elsewhere
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_cumulative_bumped` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative_bumped` is never read
[INFO] [stdout]   --> src/bin/follower.rs:37:21
[INFO] [stdout]    |
[INFO] [stdout] 37 |                     cumulative_bumped += bumped;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `cumulative_bumped` is assigned to, but never used
[INFO] [stdout]   --> src/bin/follower.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut cumulative_bumped: usize = 0; // retained if needed elsewhere
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_cumulative_bumped` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `cumulative_bumped` is never read
[INFO] [stdout]   --> src/bin/follower.rs:37:21
[INFO] [stdout]    |
[INFO] [stdout] 37 |                     cumulative_bumped += bumped;
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `index_to_location` is never read
[INFO] [stdout]   --> src/spatial.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | struct DimMeta {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 14 |     index_to_location: FxHashMap<usize, Vec<usize>>, // index -> location coord
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1m 39s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: nom v4.2.3
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "ab947da2351ab351f471c921bf21169b9e03e96b6d7a8408790f4bd8a1f202ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab947da2351ab351f471c921bf21169b9e03e96b6d7a8408790f4bd8a1f202ca", kill_on_drop: false }`
[INFO] [stdout] ab947da2351ab351f471c921bf21169b9e03e96b6d7a8408790f4bd8a1f202ca