[INFO] fetching crate collect 0.0.26...
[INFO] documenting collect-0.0.26 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate collect 0.0.26 into /workspace/builds/worker-94/source
[INFO] validating manifest of crates.io crate collect 0.0.26 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate collect 0.0.26
[INFO] finished tweaking crates.io crate collect 0.0.26
[INFO] tweaked toml for crates.io crate collect 0.0.26 written to /workspace/builds/worker-94/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (compare) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (ordered_iter) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (traverse) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num v0.4.0
[INFO] [stderr]   Downloaded num-bigint v0.4.3
[INFO] [stderr]   Downloaded ordered_iter v0.1.2
[INFO] [stderr]   Downloaded num-complex v0.4.1
[INFO] [stderr]   Downloaded num-rational v0.4.0
[INFO] [stderr]   Downloaded compare v0.1.0
[INFO] [stderr]   Downloaded traverse v0.0.12
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0b9be55bdc474ad01ca84bba8283fd9e648c7f95b1fec0a47de4712e3a8dd7df
[INFO] running `Command { std: "docker" "start" "-a" "0b9be55bdc474ad01ca84bba8283fd9e648c7f95b1fec0a47de4712e3a8dd7df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b9be55bdc474ad01ca84bba8283fd9e648c7f95b1fec0a47de4712e3a8dd7df", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b9be55bdc474ad01ca84bba8283fd9e648c7f95b1fec0a47de4712e3a8dd7df", kill_on_drop: false }`
[INFO] [stdout] 0b9be55bdc474ad01ca84bba8283fd9e648c7f95b1fec0a47de4712e3a8dd7df
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-94/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f99ae395a935fea6101b4e379e46bf0172a48e2cf5349c10c62ac0d8539862f1
[INFO] running `Command { std: "docker" "start" "-a" "f99ae395a935fea6101b4e379e46bf0172a48e2cf5349c10c62ac0d8539862f1", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (compare) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (ordered_iter) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr] warning: dependency (traverse) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking compare v0.1.0
[INFO] [stderr]     Checking bit-set v0.5.2
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking ordered_iter v0.1.2
[INFO] [stderr]     Checking num-complex v0.4.1
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking traverse v0.0.12
[INFO] [stderr]  Documenting collect v0.0.26 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lint `raw_pointer_derive` has been removed: using derive with raw pointers is ok
[INFO] [stdout]   --> src/lib.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 | #![allow(raw_pointer_derive)]
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:229:5
[INFO] [stdout]     |
[INFO] [stdout] 229 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:254:5
[INFO] [stdout]     |
[INFO] [stdout] 254 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:278:5
[INFO] [stdout]     |
[INFO] [stdout] 278 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:330:5
[INFO] [stdout]     |
[INFO] [stdout] 330 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:381:5
[INFO] [stdout]     |
[INFO] [stdout] 381 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:406:5
[INFO] [stdout]     |
[INFO] [stdout] 406 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:421:5
[INFO] [stdout]     |
[INFO] [stdout] 421 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:437:5
[INFO] [stdout]     |
[INFO] [stdout] 437 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:459:5
[INFO] [stdout]     |
[INFO] [stdout] 459 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:488:5
[INFO] [stdout]     |
[INFO] [stdout] 488 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:514:5
[INFO] [stdout]     |
[INFO] [stdout] 514 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:543:5
[INFO] [stdout]     |
[INFO] [stdout] 543 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/map.rs:566:5
[INFO] [stdout]     |
[INFO] [stdout] 566 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:134:5
[INFO] [stdout]     |
[INFO] [stdout] 134 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 161 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:198:5
[INFO] [stdout]     |
[INFO] [stdout] 198 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:266:5
[INFO] [stdout]     |
[INFO] [stdout] 266 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:298:5
[INFO] [stdout]     |
[INFO] [stdout] 298 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:327:5
[INFO] [stdout]     |
[INFO] [stdout] 327 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:356:5
[INFO] [stdout]     |
[INFO] [stdout] 356 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:380:5
[INFO] [stdout]     |
[INFO] [stdout] 380 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:395:5
[INFO] [stdout]     |
[INFO] [stdout] 395 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:411:5
[INFO] [stdout]     |
[INFO] [stdout] 411 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:430:5
[INFO] [stdout]     |
[INFO] [stdout] 430 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:454:5
[INFO] [stdout]     |
[INFO] [stdout] 454 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:475:5
[INFO] [stdout]     |
[INFO] [stdout] 475 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:520:5
[INFO] [stdout]     |
[INFO] [stdout] 520 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:540:5
[INFO] [stdout]     |
[INFO] [stdout] 540 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/tree/set.rs:562:5
[INFO] [stdout]     |
[INFO] [stdout] 562 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> src/enum_set.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/enum_set.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 105 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/enum_set.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/enum_set.rs:121:5
[INFO] [stdout]     |
[INFO] [stdout] 121 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/enum_set.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 127 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/enum_set.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 133 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/enum_set.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/enum_set.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/enum_set.rs:165:5
[INFO] [stdout]     |
[INFO] [stdout] 165 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/enum_set.rs:171:5
[INFO] [stdout]     |
[INFO] [stdout] 171 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> src/lru_cache.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]   --> src/lru_cache.rs:86:5
[INFO] [stdout]    |
[INFO] [stdout] 86 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/lru_cache.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/lru_cache.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/lru_cache.rs:145:5
[INFO] [stdout]     |
[INFO] [stdout] 145 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/lru_cache.rs:181:5
[INFO] [stdout]     |
[INFO] [stdout] 181 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/lru_cache.rs:195:5
[INFO] [stdout]     |
[INFO] [stdout] 195 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/lru_cache.rs:199:5
[INFO] [stdout]     |
[INFO] [stdout] 199 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: malformed `unstable` attribute input
[INFO] [stdout]    --> src/lru_cache.rs:203:5
[INFO] [stdout]     |
[INFO] [stdout] 203 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: must be of the form: `#[unstable(feature = "name", reason = "...", issue = "N")]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::num::Int`
[INFO] [stdout]  --> src/blist.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::num::Int;
[INFO] [stdout]   |     ^^^^^^^^^^^^^ no `Int` in `num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `core::num::Int`
[INFO] [stdout]   --> src/enum_set.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | use core::num::Int;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^ no `Int` in `num`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::rc::try_unwrap`
[INFO] [stdout]  --> src/immut_slist.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::rc::{try_unwrap, Rc};
[INFO] [stdout]   |               ^^^^^^^^^^ no `try_unwrap` in `rc`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::collections::hash_state`
[INFO] [stdout]   --> src/linked_hash_map.rs:34:23
[INFO] [stdout]    |
[INFO] [stdout] 34 | use std::collections::hash_state::HashState;
[INFO] [stdout]    |                       ^^^^^^^^^^ could not find `hash_state` in `collections`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::marker::NoCopy`
[INFO] [stdout]  --> src/proto/dlist.rs:5:19
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::marker::{NoCopy, PhantomData};
[INFO] [stdout]   |                   ^^^^^^
[INFO] [stdout]   |                   |
[INFO] [stdout]   |                   no `NoCopy` in `marker`
[INFO] [stdout]   |                   help: a similar name exists in the module: `Copy`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `self::alloc::arc`
[INFO] [stdout]  --> src/proto/par_vec.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use self::alloc::arc;
[INFO] [stdout]   |     ^^^^^^^^^^^^^---
[INFO] [stdout]   |     |            |
[INFO] [stdout]   |     |            help: a similar name exists in the module: `rc`
[INFO] [stdout]   |     no `arc` in the root
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::iter::range_inclusive`
[INFO] [stdout]  --> src/proto/par_vec.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use std::iter::range_inclusive;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^ no `range_inclusive` in `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/immut_slist.rs:104:3
[INFO] [stdout]     |
[INFO] [stdout] 104 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/linked_hash_map.rs:528:3
[INFO] [stdout]     |
[INFO] [stdout] 528 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: cannot find attribute `unsafe_destructor` in this scope
[INFO] [stdout]    --> src/proto/dlist.rs:667:3
[INFO] [stdout]     |
[INFO] [stdout] 667 | #[unsafe_destructor]
[INFO] [stdout]     |   ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0603]: module `range` is private
[INFO] [stdout]    --> src/lru_cache.rs:42:17
[INFO] [stdout]     |
[INFO] [stdout] 42  | use std::iter::{range, IntoIterator, Extend};
[INFO] [stdout]     |                 ^^^^^ private module
[INFO] [stdout]     |
[INFO] [stdout] note: the module `range` is defined here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:28:1
[INFO] [stdout]    |
[INFO] [stdout] 28 | #![feature(box_patterns, box_syntax)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:29:1
[INFO] [stdout]    |
[INFO] [stdout] 29 | #![feature(std_misc)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:30:1
[INFO] [stdout]    |
[INFO] [stdout] 30 | #![feature(unboxed_closures)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | #![feature(unsafe_destructor)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:33:1
[INFO] [stdout]    |
[INFO] [stdout] 33 | #![feature(core, hash, alloc)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0734]: stability attributes may not be used outside of the standard library
[INFO] [stdout]    --> src/tree/map.rs:200:5
[INFO] [stdout]     |
[INFO] [stdout] 200 |     #[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/tree/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/tree/map.rs:254:5
[INFO] [stdout]     |
[INFO] [stdout] 254 |     #[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/tree/map.rs:278:5
[INFO] [stdout]     |
[INFO] [stdout] 278 |     #[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/tree/map.rs:330:5
[INFO] [stdout]     |
[INFO] [stdout] 330 |     #[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/tree/map.rs:381:5
[INFO] [stdout]     |
[INFO] [stdout] 381 |     #[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/tree/map.rs:406:5
[INFO] [stdout]     |
[INFO] [stdout] 406 |     #[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/tree/map.rs:421:5
[INFO] [stdout]     |
[INFO] [stdout] 421 |     #[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/tree/map.rs:437:5
[INFO] [stdout]     |
[INFO] [stdout] 437 |     #[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/tree/map.rs:459:5
[INFO] [stdout]     |
[INFO] [stdout] 459 |     #[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/tree/map.rs:488:5
[INFO] [stdout]     |
[INFO] [stdout] 488 |     #[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/tree/map.rs:514:5
[INFO] [stdout]     |
[INFO] [stdout] 514 |     #[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/tree/map.rs:543:5
[INFO] [stdout]     |
[INFO] [stdout] 543 |     #[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/tree/map.rs:566:5
[INFO] [stdout]     |
[INFO] [stdout] 566 |     #[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/tree/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/tree/set.rs:161:5
[INFO] [stdout]     |
[INFO] [stdout] 161 |     #[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/tree/set.rs:198:5
[INFO] [stdout]     |
[INFO] [stdout] 198 |     #[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/tree/set.rs:266:5
[INFO] [stdout]     |
[INFO] [stdout] 266 |     #[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/tree/set.rs:298:5
[INFO] [stdout]     |
[INFO] [stdout] 298 |     #[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/tree/set.rs:327:5
[INFO] [stdout]     |
[INFO] [stdout] 327 |     #[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/tree/set.rs:356:5
[INFO] [stdout]     |
[INFO] [stdout] 356 |     #[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/tree/set.rs:380:5
[INFO] [stdout]     |
[INFO] [stdout] 380 |     #[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/tree/set.rs:395:5
[INFO] [stdout]     |
[INFO] [stdout] 395 |     #[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/tree/set.rs:411:5
[INFO] [stdout]     |
[INFO] [stdout] 411 |     #[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/tree/set.rs:430:5
[INFO] [stdout]     |
[INFO] [stdout] 430 |     #[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/tree/set.rs:454:5
[INFO] [stdout]     |
[INFO] [stdout] 454 |     #[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/tree/set.rs:475:5
[INFO] [stdout]     |
[INFO] [stdout] 475 |     #[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/tree/set.rs:520:5
[INFO] [stdout]     |
[INFO] [stdout] 520 |     #[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/tree/set.rs:540:5
[INFO] [stdout]     |
[INFO] [stdout] 540 |     #[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/tree/set.rs:562:5
[INFO] [stdout]     |
[INFO] [stdout] 562 |     #[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/tree/set.rs:698:1
[INFO] [stdout]     |
[INFO] [stdout] 698 | #[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/tree/set.rs:726:1
[INFO] [stdout]     |
[INFO] [stdout] 726 | #[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/tree/set.rs:754:1
[INFO] [stdout]     |
[INFO] [stdout] 754 | #[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/tree/set.rs:782:1
[INFO] [stdout]     |
[INFO] [stdout] 782 | #[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/enum_set.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 |     #[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/enum_set.rs:105:5
[INFO] [stdout]     |
[INFO] [stdout] 105 |     #[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/enum_set.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     #[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/enum_set.rs:121:5
[INFO] [stdout]     |
[INFO] [stdout] 121 |     #[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/enum_set.rs:127:5
[INFO] [stdout]     |
[INFO] [stdout] 127 |     #[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/enum_set.rs:133:5
[INFO] [stdout]     |
[INFO] [stdout] 133 |     #[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/enum_set.rs:149:5
[INFO] [stdout]     |
[INFO] [stdout] 149 |     #[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/enum_set.rs:157:5
[INFO] [stdout]     |
[INFO] [stdout] 157 |     #[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/enum_set.rs:165:5
[INFO] [stdout]     |
[INFO] [stdout] 165 |     #[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/enum_set.rs:171:5
[INFO] [stdout]     |
[INFO] [stdout] 171 |     #[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/lru_cache.rs:64:5
[INFO] [stdout]    |
[INFO] [stdout] 64 |     #[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/lru_cache.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/lru_cache.rs:111:5
[INFO] [stdout]     |
[INFO] [stdout] 111 |     #[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/lru_cache.rs:131:5
[INFO] [stdout]     |
[INFO] [stdout] 131 |     #[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/lru_cache.rs:145:5
[INFO] [stdout]     |
[INFO] [stdout] 145 |     #[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/lru_cache.rs:181:5
[INFO] [stdout]     |
[INFO] [stdout] 181 |     #[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/lru_cache.rs:195:5
[INFO] [stdout]     |
[INFO] [stdout] 195 |     #[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/lru_cache.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/lru_cache.rs:203:5
[INFO] [stdout]     |
[INFO] [stdout] 203 |     #[unstable = "matches collection reform specification, waiting for dust to settle"]
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/interval_heap.rs:292:14
[INFO] [stdout]     |
[INFO] [stdout] 292 |             1...2 => Some(self.data.swap_remove(0)),
[INFO] [stdout]     |              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> src/interval_heap.rs:307:14
[INFO] [stdout]     |
[INFO] [stdout] 307 |             0...2 => self.data.pop(),
[INFO] [stdout]     |              ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/linked_hash_map.rs:648:44
[INFO] [stdout]     |
[INFO] [stdout] 648 |     #[inline] fn next(&mut self) -> Option<(&'a K)> { self.inner.next() }
[INFO] [stdout]     |                                            ^     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 648 -     #[inline] fn next(&mut self) -> Option<(&'a K)> { self.inner.next() }
[INFO] [stdout] 648 +     #[inline] fn next(&mut self) -> Option<&'a K> { self.inner.next() }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/linked_hash_map.rs:653:49
[INFO] [stdout]     |
[INFO] [stdout] 653 |     #[inline] fn next_back(&mut self) -> Option<(&'a K)> { self.inner.next_back() }
[INFO] [stdout]     |                                                 ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 653 -     #[inline] fn next_back(&mut self) -> Option<(&'a K)> { self.inner.next_back() }
[INFO] [stdout] 653 +     #[inline] fn next_back(&mut self) -> Option<&'a K> { self.inner.next_back() }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/linked_hash_map.rs:670:44
[INFO] [stdout]     |
[INFO] [stdout] 670 |     #[inline] fn next(&mut self) -> Option<(&'a V)> { self.inner.next() }
[INFO] [stdout]     |                                            ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 670 -     #[inline] fn next(&mut self) -> Option<(&'a V)> { self.inner.next() }
[INFO] [stdout] 670 +     #[inline] fn next(&mut self) -> Option<&'a V> { self.inner.next() }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]    --> src/linked_hash_map.rs:675:49
[INFO] [stdout]     |
[INFO] [stdout] 675 |     #[inline] fn next_back(&mut self) -> Option<(&'a V)> { self.inner.next_back() }
[INFO] [stdout]     |                                                 ^     ^
[INFO] [stdout]     |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout] 675 -     #[inline] fn next_back(&mut self) -> Option<(&'a V)> { self.inner.next_back() }
[INFO] [stdout] 675 +     #[inline] fn next_back(&mut self) -> Option<&'a V> { self.inner.next_back() }
[INFO] [stdout]     | 
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 119 previous errors; 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0603, E0734.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `collect`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name collect src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="blist"' --cfg 'feature="compare"' --cfg 'feature="default"' --cfg 'feature="enum_set"' --cfg 'feature="immut_slist"' --cfg 'feature="interval_heap"' --cfg 'feature="linked_hash_map"' --cfg 'feature="lru_cache"' --cfg 'feature="ordered_iter"' --cfg 'feature="proto"' --cfg 'feature="string_joiner"' --cfg 'feature="traverse"' --cfg 'feature="tree_map"' --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=6069345e7d3d2cd7 -L dependency=/opt/rustwide/target/debug/deps --extern compare=/opt/rustwide/target/debug/deps/libcompare-95225415092e0dbd.rmeta --extern ordered_iter=/opt/rustwide/target/debug/deps/libordered_iter-e2aa4e485403156c.rmeta --extern traverse=/opt/rustwide/target/debug/deps/libtraverse-a41d91240a32ea13.rmeta --cap-lints=warn --crate-version 0.0.26` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "f99ae395a935fea6101b4e379e46bf0172a48e2cf5349c10c62ac0d8539862f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f99ae395a935fea6101b4e379e46bf0172a48e2cf5349c10c62ac0d8539862f1", kill_on_drop: false }`
[INFO] [stdout] f99ae395a935fea6101b4e379e46bf0172a48e2cf5349c10c62ac0d8539862f1