[INFO] fetching crate cow 0.0.8...
[INFO] checking cow-0.0.8 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate cow 0.0.8 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate cow 0.0.8
[INFO] finished tweaking crates.io crate cow 0.0.8
[INFO] tweaked toml for crates.io crate cow 0.0.8 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cow 0.0.8 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 17 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: path `src/cow.rs` was erroneously implicitly accepted for library `cow`,
[INFO] [stderr] please rename the file to `src/lib.rs` or set lib.path in Cargo.toml
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 032837200eda7a26af3814d676a7a50987703086d1c846271712289142af67a9
[INFO] running `Command { std: "docker" "start" "-a" "032837200eda7a26af3814d676a7a50987703086d1c846271712289142af67a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "032837200eda7a26af3814d676a7a50987703086d1c846271712289142af67a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "032837200eda7a26af3814d676a7a50987703086d1c846271712289142af67a9", kill_on_drop: false }`
[INFO] [stdout] 032837200eda7a26af3814d676a7a50987703086d1c846271712289142af67a9
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 68d223ca9eee8e29d5705daac8ddc5435a9f7c664810f5aa54a6bf321fd6c3fc
[INFO] running `Command { std: "docker" "start" "-a" "68d223ca9eee8e29d5705daac8ddc5435a9f7c664810f5aa54a6bf321fd6c3fc", kill_on_drop: false }`
[INFO] [stderr] warning: path `src/cow.rs` was erroneously implicitly accepted for library `cow`,
[INFO] [stderr] please rename the file to `src/lib.rs` or set lib.path in Cargo.toml
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2024
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking getrandom v0.3.3
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking rand v0.9.2
[INFO] [stderr]     Checking cow v0.0.8 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `collections`
[INFO] [stdout]  --> src/cow.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate collections;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0463]: can't find crate for `collections`
[INFO] [stdout]  --> src/cow.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern crate collections;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stdout]    --> src/trie/map.rs:129:15
[INFO] [stdout]     |
[INFO] [stdout] 129 |         iter::order::partial_cmp(self.iter(), other.iter())
[INFO] [stdout]     |               ^^^^^ could not find `order` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stdout]    --> src/trie/map.rs:136:15
[INFO] [stdout]     |
[INFO] [stdout] 136 |         iter::order::cmp(self.iter(), other.iter())
[INFO] [stdout]     |               ^^^^^ could not find `order` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/trie/map.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         try!(write!(f, "{{"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/trie/map.rs:146:13
[INFO] [stdout]     |
[INFO] [stdout] 146 |             try!(write!(f, "{:?}: {:?}", k, *v));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/trie/map.rs:145:25
[INFO] [stdout]     |
[INFO] [stdout] 145 |             if i != 0 { try!(write!(f, ", ")); }
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/trie/set.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         try!(write!(f, "{{"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/trie/set.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 |             try!(write!(f, "{:?}", x));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/trie/set.rs:63:25
[INFO] [stdout]    |
[INFO] [stdout] 63 |             if i != 0 { try!(write!(f, ", ")); }
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:168:5
[INFO] [stdout]     |
[INFO] [stdout] 168 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:199:5
[INFO] [stdout]     |
[INFO] [stdout] 199 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:209:5
[INFO] [stdout]     |
[INFO] [stdout] 209 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:229:5
[INFO] [stdout]     |
[INFO] [stdout] 229 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:253:5
[INFO] [stdout]     |
[INFO] [stdout] 253 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 269 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:285:5
[INFO] [stdout]     |
[INFO] [stdout] 285 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:310:5
[INFO] [stdout]     |
[INFO] [stdout] 310 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:343:5
[INFO] [stdout]     |
[INFO] [stdout] 343 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:367:5
[INFO] [stdout]     |
[INFO] [stdout] 367 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:400:5
[INFO] [stdout]     |
[INFO] [stdout] 400 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:427:5
[INFO] [stdout]     |
[INFO] [stdout] 427 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:455:5
[INFO] [stdout]     |
[INFO] [stdout] 455 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/trie/set.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:134:5
[INFO] [stdout]     |
[INFO] [stdout] 134 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:196:5
[INFO] [stdout]     |
[INFO] [stdout] 196 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:222:5
[INFO] [stdout]     |
[INFO] [stdout] 222 |     #[unstable = "matches collection reform specification, waiting for dust to settle."]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:245:5
[INFO] [stdout]     |
[INFO] [stdout] 245 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:268:5
[INFO] [stdout]     |
[INFO] [stdout] 268 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:286:5
[INFO] [stdout]     |
[INFO] [stdout] 286 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:301:5
[INFO] [stdout]     |
[INFO] [stdout] 301 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:317:5
[INFO] [stdout]     |
[INFO] [stdout] 317 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:332:5
[INFO] [stdout]     |
[INFO] [stdout] 332 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:355:5
[INFO] [stdout]     |
[INFO] [stdout] 355 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:377:5
[INFO] [stdout]     |
[INFO] [stdout] 377 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:402:5
[INFO] [stdout]     |
[INFO] [stdout] 402 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:422:5
[INFO] [stdout]     |
[INFO] [stdout] 422 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:442:5
[INFO] [stdout]     |
[INFO] [stdout] 442 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:464:1
[INFO] [stdout]     |
[INFO] [stdout] 464 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:487:1
[INFO] [stdout]     |
[INFO] [stdout] 487 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:510:1
[INFO] [stdout]     |
[INFO] [stdout] 510 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:533:1
[INFO] [stdout]     |
[INFO] [stdout] 533 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core` has been stable since 1.6.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/cow.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `alloc` has been stable since 1.36.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/cow.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `rand`
[INFO] [stdout]  --> src/cow.rs:4:62
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |                                                              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `hash`
[INFO] [stdout]  --> src/cow.rs:4:68
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |                                                                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `collections`
[INFO] [stdout]  --> src/cow.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::iter::range_step`
[INFO] [stdout]     --> src/trie/map.rs:1237:9
[INFO] [stdout]      |
[INFO] [stdout] 1237 |     use std::iter::range_step;
[INFO] [stdout]      |         ^^^^^^^^^^^^^^^^^^^^^ no `range_step` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::rand`
[INFO] [stdout]     --> src/trie/map.rs:1783:14
[INFO] [stdout]      |
[INFO] [stdout] 1783 |     use std::rand::{weak_rng, Rng};
[INFO] [stdout]      |              ^^^^ could not find `rand` in `std`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stdout]    --> src/trie/map.rs:129:15
[INFO] [stdout]     |
[INFO] [stdout] 129 |         iter::order::partial_cmp(self.iter(), other.iter())
[INFO] [stdout]     |               ^^^^^ could not find `order` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0433]: failed to resolve: could not find `order` in `iter`
[INFO] [stdout]    --> src/trie/map.rs:136:15
[INFO] [stdout]     |
[INFO] [stdout] 136 |         iter::order::cmp(self.iter(), other.iter())
[INFO] [stdout]     |               ^^^^^ could not find `order` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0437]: type `Output` is not a member of trait `FnMut`
[INFO] [stdout]    --> src/trie/set.rs:760:9
[INFO] [stdout]     |
[INFO] [stdout] 760 |         type Output = bool;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^ not a member of trait `FnMut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `hash` in module `hash`
[INFO] [stdout]     --> src/trie/map.rs:1604:21
[INFO] [stdout]      |
[INFO] [stdout] 1604 |       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |                     ^^^^ not found in `hash`
[INFO] [stdout]      |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]      |
[INFO] [stdout] 1237 +     use trie::map::ptr::hash;
[INFO] [stdout]      |
[INFO] [stdout] help: if you import `hash`, refer to it directly
[INFO] [stdout]      |
[INFO] [stdout] 1604 -       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout] 1604 +       assert!(hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `hash` in module `hash`
[INFO] [stdout]     --> src/trie/map.rs:1604:61
[INFO] [stdout]      |
[INFO] [stdout] 1604 |       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |                                                             ^^^^ not found in `hash`
[INFO] [stdout]      |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]      |
[INFO] [stdout] 1237 +     use trie::map::ptr::hash;
[INFO] [stdout]      |
[INFO] [stdout] help: if you import `hash`, refer to it directly
[INFO] [stdout]      |
[INFO] [stdout] 1604 -       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout] 1604 +       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `hash` in module `hash`
[INFO] [stdout]     --> src/trie/map.rs:1613:21
[INFO] [stdout]      |
[INFO] [stdout] 1613 |       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |                     ^^^^ not found in `hash`
[INFO] [stdout]      |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]      |
[INFO] [stdout] 1237 +     use trie::map::ptr::hash;
[INFO] [stdout]      |
[INFO] [stdout] help: if you import `hash`, refer to it directly
[INFO] [stdout]      |
[INFO] [stdout] 1613 -       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout] 1613 +       assert!(hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `hash` in module `hash`
[INFO] [stdout]     --> src/trie/map.rs:1613:61
[INFO] [stdout]      |
[INFO] [stdout] 1613 |       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |                                                             ^^^^ not found in `hash`
[INFO] [stdout]      |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]      |
[INFO] [stdout] 1237 +     use trie::map::ptr::hash;
[INFO] [stdout]      |
[INFO] [stdout] help: if you import `hash`, refer to it directly
[INFO] [stdout]      |
[INFO] [stdout] 1613 -       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout] 1613 +       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/trie/map.rs:142:9
[INFO] [stdout]     |
[INFO] [stdout] 142 |         try!(write!(f, "{{"));
[INFO] [stdout]     |         ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/trie/map.rs:146:13
[INFO] [stdout]     |
[INFO] [stdout] 146 |             try!(write!(f, "{:?}: {:?}", k, *v));
[INFO] [stdout]     |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/trie/map.rs:145:25
[INFO] [stdout]     |
[INFO] [stdout] 145 |             if i != 0 { try!(write!(f, ", ")); }
[INFO] [stdout]     |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1304:18
[INFO] [stdout]      |
[INFO] [stdout] 1304 |         for x in (0..n) {
[INFO] [stdout]      |                  ^    ^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1304 -         for x in (0..n) {
[INFO] [stdout] 1304 +         for x in 0..n {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1476:18
[INFO] [stdout]      |
[INFO] [stdout] 1476 |         for i in (0..last - step) {
[INFO] [stdout]      |                  ^              ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1476 -         for i in (0..last - step) {
[INFO] [stdout] 1476 +         for i in 0..last - step {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1494:18
[INFO] [stdout]      |
[INFO] [stdout] 1494 |         for i in (last - step + 1..last) {
[INFO] [stdout]      |                  ^                     ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1494 -         for i in (last - step + 1..last) {
[INFO] [stdout] 1494 +         for i in last - step + 1..last {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1510:18
[INFO] [stdout]      |
[INFO] [stdout] 1510 |         for i in (0..100) {
[INFO] [stdout]      |                  ^      ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1510 -         for i in (0..100) {
[INFO] [stdout] 1510 +         for i in 0..100 {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1515:18
[INFO] [stdout]      |
[INFO] [stdout] 1515 |         for i in (0..199) {
[INFO] [stdout]      |                  ^      ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1515 -         for i in (0..199) {
[INFO] [stdout] 1515 +         for i in 0..199 {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1523:18
[INFO] [stdout]      |
[INFO] [stdout] 1523 |         for i in (0..198) {
[INFO] [stdout]      |                  ^      ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1523 -         for i in (0..198) {
[INFO] [stdout] 1523 +         for i in 0..198 {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1658:18
[INFO] [stdout]      |
[INFO] [stdout] 1658 |         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout]      |                  ^                    ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1658 -         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout] 1658 +         for i in 0..SQUARES_UPPER_LIM {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1668:18
[INFO] [stdout]      |
[INFO] [stdout] 1668 |         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout]      |                  ^                    ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1668 -         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout] 1668 +         for i in 0..SQUARES_UPPER_LIM {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1682:18
[INFO] [stdout]      |
[INFO] [stdout] 1682 |         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout]      |                  ^                    ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1682 -         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout] 1682 +         for i in 0..SQUARES_UPPER_LIM {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1736:18
[INFO] [stdout]      |
[INFO] [stdout] 1736 |         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout]      |                  ^                    ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1736 -         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout] 1736 +         for i in 0..SQUARES_UPPER_LIM {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1750:18
[INFO] [stdout]      |
[INFO] [stdout] 1750 |         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout]      |                  ^                    ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1750 -         for i in (0..SQUARES_UPPER_LIM) {
[INFO] [stdout] 1750 +         for i in 0..SQUARES_UPPER_LIM {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1794:18
[INFO] [stdout]      |
[INFO] [stdout] 1794 |         for _ in (0..size) {
[INFO] [stdout]      |                  ^       ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1794 -         for _ in (0..size) {
[INFO] [stdout] 1794 +         for _ in 0..size {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1828:18
[INFO] [stdout]      |
[INFO] [stdout] 1828 |         for _ in (0..MAP_SIZE) {
[INFO] [stdout]      |                  ^           ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1828 -         for _ in (0..MAP_SIZE) {
[INFO] [stdout] 1828 +         for _ in 0..MAP_SIZE {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1833:22
[INFO] [stdout]      |
[INFO] [stdout] 1833 |             for _ in (0..10) {
[INFO] [stdout]      |                      ^     ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1833 -             for _ in (0..10) {
[INFO] [stdout] 1833 +             for _ in 0..10 {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1843:18
[INFO] [stdout]      |
[INFO] [stdout] 1843 |         for _ in (0..MAP_SIZE) {
[INFO] [stdout]      |                  ^           ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1843 -         for _ in (0..MAP_SIZE) {
[INFO] [stdout] 1843 +         for _ in 0..MAP_SIZE {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1848:22
[INFO] [stdout]      |
[INFO] [stdout] 1848 |             for _ in (0..10) {
[INFO] [stdout]      |                      ^     ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1848 -             for _ in (0..10) {
[INFO] [stdout] 1848 +             for _ in 0..10 {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1860:22
[INFO] [stdout]      |
[INFO] [stdout] 1860 |             for _ in (0..MAP_SIZE) {
[INFO] [stdout]      |                      ^           ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1860 -             for _ in (0..MAP_SIZE) {
[INFO] [stdout] 1860 +             for _ in 0..MAP_SIZE {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1872:22
[INFO] [stdout]      |
[INFO] [stdout] 1872 |             for _ in (0..MAP_SIZE) {
[INFO] [stdout]      |                      ^           ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1872 -             for _ in (0..MAP_SIZE) {
[INFO] [stdout] 1872 +             for _ in 0..MAP_SIZE {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1887:22
[INFO] [stdout]      |
[INFO] [stdout] 1887 |             for _ in (0..MAP_SIZE) {
[INFO] [stdout]      |                      ^           ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1887 -             for _ in (0..MAP_SIZE) {
[INFO] [stdout] 1887 +             for _ in 0..MAP_SIZE {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1900:22
[INFO] [stdout]      |
[INFO] [stdout] 1900 |             for _ in (0..MAP_SIZE) {
[INFO] [stdout]      |                      ^           ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1900 -             for _ in (0..MAP_SIZE) {
[INFO] [stdout] 1900 +             for _ in 0..MAP_SIZE {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]     --> src/trie/map.rs:1912:22
[INFO] [stdout]      |
[INFO] [stdout] 1912 |             for _ in (0..MAP_SIZE) {
[INFO] [stdout]      |                      ^           ^
[INFO] [stdout]      |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]      |
[INFO] [stdout] 1912 -             for _ in (0..MAP_SIZE) {
[INFO] [stdout] 1912 +             for _ in 0..MAP_SIZE {
[INFO] [stdout]      |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/trie/set.rs:60:9
[INFO] [stdout]    |
[INFO] [stdout] 60 |         try!(write!(f, "{{"));
[INFO] [stdout]    |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/trie/set.rs:64:13
[INFO] [stdout]    |
[INFO] [stdout] 64 |             try!(write!(f, "{:?}", x));
[INFO] [stdout]    |             ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/trie/set.rs:63:25
[INFO] [stdout]    |
[INFO] [stdout] 63 |             if i != 0 { try!(write!(f, ", ")); }
[INFO] [stdout]    |                         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:168:5
[INFO] [stdout]     |
[INFO] [stdout] 168 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:199:5
[INFO] [stdout]     |
[INFO] [stdout] 199 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:209:5
[INFO] [stdout]     |
[INFO] [stdout] 209 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:229:5
[INFO] [stdout]     |
[INFO] [stdout] 229 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:253:5
[INFO] [stdout]     |
[INFO] [stdout] 253 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 269 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:285:5
[INFO] [stdout]     |
[INFO] [stdout] 285 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:310:5
[INFO] [stdout]     |
[INFO] [stdout] 310 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:343:5
[INFO] [stdout]     |
[INFO] [stdout] 343 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:367:5
[INFO] [stdout]     |
[INFO] [stdout] 367 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:400:5
[INFO] [stdout]     |
[INFO] [stdout] 400 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:427:5
[INFO] [stdout]     |
[INFO] [stdout] 427 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/map.rs:455:5
[INFO] [stdout]     |
[INFO] [stdout] 455 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]   --> src/trie/set.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:134:5
[INFO] [stdout]     |
[INFO] [stdout] 134 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:196:5
[INFO] [stdout]     |
[INFO] [stdout] 196 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:222:5
[INFO] [stdout]     |
[INFO] [stdout] 222 |     #[unstable = "matches collection reform specification, waiting for dust to settle."]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:245:5
[INFO] [stdout]     |
[INFO] [stdout] 245 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:268:5
[INFO] [stdout]     |
[INFO] [stdout] 268 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:286:5
[INFO] [stdout]     |
[INFO] [stdout] 286 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:301:5
[INFO] [stdout]     |
[INFO] [stdout] 301 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:317:5
[INFO] [stdout]     |
[INFO] [stdout] 317 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:332:5
[INFO] [stdout]     |
[INFO] [stdout] 332 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:355:5
[INFO] [stdout]     |
[INFO] [stdout] 355 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:377:5
[INFO] [stdout]     |
[INFO] [stdout] 377 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:402:5
[INFO] [stdout]     |
[INFO] [stdout] 402 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:422:5
[INFO] [stdout]     |
[INFO] [stdout] 422 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:442:5
[INFO] [stdout]     |
[INFO] [stdout] 442 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:464:1
[INFO] [stdout]     |
[INFO] [stdout] 464 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:487:1
[INFO] [stdout]     |
[INFO] [stdout] 487 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:510:1
[INFO] [stdout]     |
[INFO] [stdout] 510 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/trie/set.rs:533:1
[INFO] [stdout]     |
[INFO] [stdout] 533 | #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:742:48
[INFO] [stdout]     |
[INFO] [stdout] 742 |         Internal(ref mut x) => find_mut(&mut x.make_unique().children[chunk(key, idx)], key, idx + 1),
[INFO] [stdout]     |                                                ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:771:23
[INFO] [stdout]     |
[INFO] [stdout] 771 |             let x = x.make_unique();
[INFO] [stdout]     |                       ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `core` has been stable since 1.6.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/cow.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |            ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `alloc` has been stable since 1.36.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/cow.rs:4:18
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `rand`
[INFO] [stdout]  --> src/cow.rs:4:62
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |                                                              ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `hash`
[INFO] [stdout]  --> src/cow.rs:4:68
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |                                                                    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `collections`
[INFO] [stdout]  --> src/cow.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![feature(core, alloc, collections, unboxed_closures, test, rand, hash)]
[INFO] [stdout]   |                         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `std::hash::SipHasher`: use `std::hash::DefaultHasher` instead
[INFO] [stdout]     --> src/trie/map.rs:1604:37
[INFO] [stdout]      |
[INFO] [stdout] 1604 |       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |                                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `std::hash::SipHasher`: use `std::hash::DefaultHasher` instead
[INFO] [stdout]     --> src/trie/map.rs:1604:77
[INFO] [stdout]      |
[INFO] [stdout] 1604 |       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |                                                                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `std::hash::SipHasher`: use `std::hash::DefaultHasher` instead
[INFO] [stdout]     --> src/trie/map.rs:1613:37
[INFO] [stdout]      |
[INFO] [stdout] 1613 |       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |                                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `std::hash::SipHasher`: use `std::hash::DefaultHasher` instead
[INFO] [stdout]     --> src/trie/map.rs:1613:77
[INFO] [stdout]      |
[INFO] [stdout] 1613 |       assert!(hash::hash::<_, hash::SipHasher>(&x) == hash::hash::<_, hash::SipHasher>(&y));
[INFO] [stdout]      |                                                                             ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:788:49
[INFO] [stdout]     |
[INFO] [stdout] 788 |                     let mut new_node = new_node.make_unique();
[INFO] [stdout]     |                                                 ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `fn_traits`
[INFO] [stdout]    --> src/trie/set.rs:761:9
[INFO] [stdout]     |
[INFO] [stdout] 761 |         extern "rust-call" fn call_mut(&mut self, (x,): (usize,)) -> bool {
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
[INFO] [stdout]     = help: add `#![feature(fn_traits)]` to the crate attributes to enable
[INFO] [stdout]     = note: this compiler was built on 2025-08-19; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:819:25
[INFO] [stdout]     |
[INFO] [stdout] 819 |           let mut x = x.make_unique();
[INFO] [stdout]     |                         ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:958:51
[INFO] [stdout]     |
[INFO] [stdout] 958 |             let mut node_internal = node_internal.make_unique();
[INFO] [stdout]     |                                                   ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]     --> src/trie/map.rs:1037:45
[INFO] [stdout]      |
[INFO] [stdout] 1037 |                     let internal = internal.make_unique();
[INFO] [stdout]      |                                             ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]     --> src/trie/map.rs:1079:45
[INFO] [stdout]      |
[INFO] [stdout] 1079 |                     let mut parent = parent.make_unique();
[INFO] [stdout]      |                                             ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: expected a `FnOnce(usize)` closure, found `Counter<'a, 'b>`
[INFO] [stdout]    --> src/trie/set.rs:761:9
[INFO] [stdout]     |
[INFO] [stdout] 761 |         extern "rust-call" fn call_mut(&mut self, (x,): (usize,)) -> bool {
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected an `FnOnce(usize)` closure, found `Counter<'a, 'b>`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FnOnce(usize)` is not implemented for `Counter<'a, 'b>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: expected a `FnOnce(usize)` closure, found `Counter<'a, 'b>`
[INFO] [stdout]    --> src/trie/set.rs:759:38
[INFO] [stdout]     |
[INFO] [stdout] 759 |     impl<'a, 'b> FnMut<(usize,)> for Counter<'a, 'b> {
[INFO] [stdout]     |                                      ^^^^^^^^^^^^^^^ expected an `FnOnce(usize)` closure, found `Counter<'a, 'b>`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `FnOnce(usize)` is not implemented for `Counter<'a, 'b>`
[INFO] [stdout] note: required by a bound in `FnMut`
[INFO] [stdout]    --> /rustc/c659ee110de67e82444e4b6c8407c1a9af9c2cf6/library/core/src/ops/function.rs:165:1
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]     --> src/trie/map.rs:1233:54
[INFO] [stdout]      |
[INFO] [stdout] 1198 |                                                 *write_ptr = node.$get_ref().children.$iter();
[INFO] [stdout]      |                                                                   -------- due to this macro variable
[INFO] [stdout] ...
[INFO] [stdout] 1233 | iterator_impl! { IterMut, iter = iter_mut, get_ref = make_unique, clone = [Clone], mutability = mut }
[INFO] [stdout]      |                                                      ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:742:48
[INFO] [stdout]     |
[INFO] [stdout] 742 |         Internal(ref mut x) => find_mut(&mut x.make_unique().children[chunk(key, idx)], key, idx + 1),
[INFO] [stdout]     |                                                ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0433, E0463, E0599, E0635, E0734.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0433`.
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:771:23
[INFO] [stdout]     |
[INFO] [stdout] 771 |             let x = x.make_unique();
[INFO] [stdout]     |                       ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cow` (lib) due to 46 previous errors; 8 warnings emitted
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:788:49
[INFO] [stdout]     |
[INFO] [stdout] 788 |                     let mut new_node = new_node.make_unique();
[INFO] [stdout]     |                                                 ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:819:25
[INFO] [stdout]     |
[INFO] [stdout] 819 |           let mut x = x.make_unique();
[INFO] [stdout]     |                         ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]    --> src/trie/map.rs:958:51
[INFO] [stdout]     |
[INFO] [stdout] 958 |             let mut node_internal = node_internal.make_unique();
[INFO] [stdout]     |                                                   ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]     --> src/trie/map.rs:1037:45
[INFO] [stdout]      |
[INFO] [stdout] 1037 |                     let internal = internal.make_unique();
[INFO] [stdout]      |                                             ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]     --> src/trie/map.rs:1079:45
[INFO] [stdout]      |
[INFO] [stdout] 1079 |                     let mut parent = parent.make_unique();
[INFO] [stdout]      |                                             ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `make_unique` found for mutable reference `&mut Arc<InternalNode<T>>` in the current scope
[INFO] [stdout]     --> src/trie/map.rs:1233:54
[INFO] [stdout]      |
[INFO] [stdout] 1198 |                                                 *write_ptr = node.$get_ref().children.$iter();
[INFO] [stdout]      |                                                                   -------- due to this macro variable
[INFO] [stdout] ...
[INFO] [stdout] 1233 | iterator_impl! { IterMut, iter = iter_mut, get_ref = make_unique, clone = [Clone], mutability = mut }
[INFO] [stdout]      |                                                      ^^^^^^^^^^^ method not found in `&mut Arc<InternalNode<T>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: expected a `FnOnce(usize)` closure, found `Counter<'_, '_>`
[INFO] [stdout]    --> src/trie/set.rs:786:67
[INFO] [stdout]     |
[INFO] [stdout] 786 |             check(a, b, expected, |x, y, f| x.intersection(y).all(f))
[INFO] [stdout]     |                                                               --- ^ the trait `FnOnce(usize)` is not implemented for `Counter<'_, '_>`
[INFO] [stdout]     |                                                               |
[INFO] [stdout]     |                                                               required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the trait bound `Counter<'_, '_>: FnOnce(usize)` is not satisfied
[INFO] [stdout] note: required by a bound in `all`
[INFO] [stdout]    --> /rustc/c659ee110de67e82444e4b6c8407c1a9af9c2cf6/library/core/src/iter/traits/iterator.rs:2761:5
[INFO] [stdout] help: consider mutably borrowing here
[INFO] [stdout]     |
[INFO] [stdout] 786 |             check(a, b, expected, |x, y, f| x.intersection(y).all(&mut f))
[INFO] [stdout]     |                                                                   ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: expected a `FnOnce(usize)` closure, found `Counter<'_, '_>`
[INFO] [stdout]    --> src/trie/set.rs:802:65
[INFO] [stdout]     |
[INFO] [stdout] 802 |             check(a, b, expected, |x, y, f| x.difference(y).all(f))
[INFO] [stdout]     |                                                             --- ^ the trait `FnOnce(usize)` is not implemented for `Counter<'_, '_>`
[INFO] [stdout]     |                                                             |
[INFO] [stdout]     |                                                             required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the trait bound `Counter<'_, '_>: FnOnce(usize)` is not satisfied
[INFO] [stdout] note: required by a bound in `all`
[INFO] [stdout]    --> /rustc/c659ee110de67e82444e4b6c8407c1a9af9c2cf6/library/core/src/iter/traits/iterator.rs:2761:5
[INFO] [stdout] help: consider mutably borrowing here
[INFO] [stdout]     |
[INFO] [stdout] 802 |             check(a, b, expected, |x, y, f| x.difference(y).all(&mut f))
[INFO] [stdout]     |                                                                 ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: expected a `FnOnce(usize)` closure, found `Counter<'_, '_>`
[INFO] [stdout]    --> src/trie/set.rs:819:75
[INFO] [stdout]     |
[INFO] [stdout] 819 |             check(a, b, expected, |x, y, f| x.symmetric_difference(y).all(f))
[INFO] [stdout]     |                                                                       --- ^ the trait `FnOnce(usize)` is not implemented for `Counter<'_, '_>`
[INFO] [stdout]     |                                                                       |
[INFO] [stdout]     |                                                                       required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the trait bound `Counter<'_, '_>: FnOnce(usize)` is not satisfied
[INFO] [stdout] note: required by a bound in `all`
[INFO] [stdout]    --> /rustc/c659ee110de67e82444e4b6c8407c1a9af9c2cf6/library/core/src/iter/traits/iterator.rs:2761:5
[INFO] [stdout] help: consider mutably borrowing here
[INFO] [stdout]     |
[INFO] [stdout] 819 |             check(a, b, expected, |x, y, f| x.symmetric_difference(y).all(&mut f))
[INFO] [stdout]     |                                                                           ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: expected a `FnOnce(usize)` closure, found `Counter<'_, '_>`
[INFO] [stdout]    --> src/trie/set.rs:833:60
[INFO] [stdout]     |
[INFO] [stdout] 833 |             check(a, b, expected, |x, y, f| x.union(y).all(f))
[INFO] [stdout]     |                                                        --- ^ the trait `FnOnce(usize)` is not implemented for `Counter<'_, '_>`
[INFO] [stdout]     |                                                        |
[INFO] [stdout]     |                                                        required by a bound introduced by this call
[INFO] [stdout]     |
[INFO] [stdout]     = note: the trait bound `Counter<'_, '_>: FnOnce(usize)` is not satisfied
[INFO] [stdout] note: required by a bound in `all`
[INFO] [stdout]    --> /rustc/c659ee110de67e82444e4b6c8407c1a9af9c2cf6/library/core/src/iter/traits/iterator.rs:2761:5
[INFO] [stdout] help: consider mutably borrowing here
[INFO] [stdout]     |
[INFO] [stdout] 833 |             check(a, b, expected, |x, y, f| x.union(y).all(&mut f))
[INFO] [stdout]     |                                                            ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0277, E0425, E0432, E0433, E0437, E0463, E0599, E0635, E0658...
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cow` (lib test) due to 60 previous errors; 33 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "68d223ca9eee8e29d5705daac8ddc5435a9f7c664810f5aa54a6bf321fd6c3fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68d223ca9eee8e29d5705daac8ddc5435a9f7c664810f5aa54a6bf321fd6c3fc", kill_on_drop: false }`
[INFO] [stdout] 68d223ca9eee8e29d5705daac8ddc5435a9f7c664810f5aa54a6bf321fd6c3fc