[INFO] fetching crate dachshund 0.1.10...
[INFO] testing dachshund-0.1.10 against 1.90.0 for beta-1.91-3
[INFO] extracting crate dachshund 0.1.10 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate dachshund 0.1.10
[INFO] finished tweaking crates.io crate dachshund 0.1.10
[INFO] tweaked toml for crates.io crate dachshund 0.1.10 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dachshund 0.1.10 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate dachshund 0.1.10 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crossbeam-deque v0.8.3
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.16
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[INFO] [stderr]   Downloaded hermit-abi v0.1.19
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[INFO] [stderr]   Downloaded simba v0.7.3
[INFO] [stderr]   Downloaded matrixmultiply v0.3.8
[INFO] [stderr]   Downloaded crossbeam-channel v0.5.8
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[INFO] [stderr]   Downloaded serde_derive v1.0.192
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[INFO] [stderr]   Downloaded nalgebra v0.31.4
[INFO] [stderr]   Downloaded num-complex v0.4.4
[INFO] [stderr]   Downloaded ordered-float v3.9.2
[INFO] [stderr]   Downloaded priority-queue v1.3.2
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b78de1e76c7095a5da385bcb0b312e756aa25b4794ede015f8a917e3324037b
[INFO] running `Command { std: "docker" "start" "-a" "6b78de1e76c7095a5da385bcb0b312e756aa25b4794ede015f8a917e3324037b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b78de1e76c7095a5da385bcb0b312e756aa25b4794ede015f8a917e3324037b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b78de1e76c7095a5da385bcb0b312e756aa25b4794ede015f8a917e3324037b", kill_on_drop: false }`
[INFO] [stdout] 6b78de1e76c7095a5da385bcb0b312e756aa25b4794ede015f8a917e3324037b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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=warn" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5deb2603c15b0c8f096d5598e989080087ca681e2acf62c788fb5756d8f7dcdc
[INFO] running `Command { std: "docker" "start" "-a" "5deb2603c15b0c8f096d5598e989080087ca681e2acf62c788fb5756d8f7dcdc", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]    Compiling unicode-ident v1.0.12
[INFO] [stderr]    Compiling libc v0.2.150
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling bytemuck v1.14.0
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling crossbeam-queue v0.3.8
[INFO] [stderr]    Compiling rayon-core v1.12.0
[INFO] [stderr]    Compiling serde v1.0.192
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling thiserror v1.0.50
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling either v1.9.0
[INFO] [stderr]    Compiling serde_json v1.0.108
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling unicode-width v0.1.11
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling safe_arch v0.7.1
[INFO] [stderr]    Compiling ryu v1.0.15
[INFO] [stderr]    Compiling vec_map v0.8.2
[INFO] [stderr]    Compiling itoa v1.0.9
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling matrixmultiply v0.3.8
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling priority-queue v1.3.2
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling retain_mut v0.1.7
[INFO] [stderr]    Compiling syn v2.0.39
[INFO] [stderr]    Compiling crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling roaring v0.10.2
[INFO] [stderr]    Compiling itertools v0.10.5
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.3
[INFO] [stderr]    Compiling wide v0.7.13
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.34.0
[INFO] [stderr]    Compiling crossbeam v0.8.2
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rayon v1.8.0
[INFO] [stderr]    Compiling num-complex v0.4.4
[INFO] [stderr]    Compiling approx v0.5.1
[INFO] [stderr]    Compiling ordered-float v3.9.2
[INFO] [stderr]    Compiling simba v0.7.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.50
[INFO] [stderr]    Compiling nalgebra-macros v0.1.0
[INFO] [stderr]    Compiling nalgebra v0.31.4
[INFO] [stderr]    Compiling dachshund v0.1.10 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | #![feature(binary_heap_into_iter_sorted)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `dachshund` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "5deb2603c15b0c8f096d5598e989080087ca681e2acf62c788fb5756d8f7dcdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5deb2603c15b0c8f096d5598e989080087ca681e2acf62c788fb5756d8f7dcdc", kill_on_drop: false }`
[INFO] [stdout] 5deb2603c15b0c8f096d5598e989080087ca681e2acf62c788fb5756d8f7dcdc