[INFO] fetching crate wedged 0.1.0...
[INFO] testing wedged-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate wedged 0.1.0 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate wedged 0.1.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wedged 0.1.0
[INFO] finished tweaking crates.io crate wedged 0.1.0
[INFO] tweaked toml for crates.io crate wedged 0.1.0 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded simba v0.7.1
[INFO] [stderr]   Downloaded wide v0.7.4
[INFO] [stderr]   Downloaded nalgebra v0.30.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f8c2d1eac2c846dcf670c79b5520e3729bb9d73788ccd1f7e4284a95e17432a7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f8c2d1eac2c846dcf670c79b5520e3729bb9d73788ccd1f7e4284a95e17432a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8c2d1eac2c846dcf670c79b5520e3729bb9d73788ccd1f7e4284a95e17432a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8c2d1eac2c846dcf670c79b5520e3729bb9d73788ccd1f7e4284a95e17432a7", kill_on_drop: false }`
[INFO] [stdout] f8c2d1eac2c846dcf670c79b5520e3729bb9d73788ccd1f7e4284a95e17432a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5c272f51413e9c61136b23c3136f7320dd5b7fbfe1527925a22d85dfd026502b
[INFO] running `Command { std: "docker" "start" "-a" "5c272f51413e9c61136b23c3136f7320dd5b7fbfe1527925a22d85dfd026502b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling wide v0.7.4
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling approx v0.5.1
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling nalgebra-macros v0.1.0
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling simba v0.7.1
[INFO] [stderr]    Compiling nalgebra v0.30.1
[INFO] [stderr]    Compiling wedged v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 04s
[INFO] running `Command { std: "docker" "inspect" "5c272f51413e9c61136b23c3136f7320dd5b7fbfe1527925a22d85dfd026502b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c272f51413e9c61136b23c3136f7320dd5b7fbfe1527925a22d85dfd026502b", kill_on_drop: false }`
[INFO] [stdout] 5c272f51413e9c61136b23c3136f7320dd5b7fbfe1527925a22d85dfd026502b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39efa4edc10d5e0a6cd1a8aaf8e067787e56decbd3018779625c9e4117399682
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "39efa4edc10d5e0a6cd1a8aaf8e067787e56decbd3018779625c9e4117399682", kill_on_drop: false }`
[INFO] [stderr]    Compiling wedged v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `grade_index`
[INFO] [stdout]   --> src/algebra/grade_cast.rs:29:19
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub(crate) fn grade_index(&self, g:usize) -> usize {
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `grade_index`
[INFO] [stdout]   --> src/algebra/grade_cast.rs:74:19
[INFO] [stdout]    |
[INFO] [stdout] 74 |     pub(crate) fn grade_index(&self, g:usize) -> usize {
[INFO] [stdout]    |                   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(test, feature(test))]
[INFO] [stdout]   |                           ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wedged` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "39efa4edc10d5e0a6cd1a8aaf8e067787e56decbd3018779625c9e4117399682", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39efa4edc10d5e0a6cd1a8aaf8e067787e56decbd3018779625c9e4117399682", kill_on_drop: false }`
[INFO] [stdout] 39efa4edc10d5e0a6cd1a8aaf8e067787e56decbd3018779625c9e4117399682