[INFO] fetching crate wedged 0.1.0...
[INFO] testing wedged-0.1.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate wedged 0.1.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate wedged 0.1.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", 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] 72c4ced9a10a67f96e9ac1a3d9f9d271679f6714592161f977c6502ddc773fb2
[INFO] running `Command { std: "docker" "start" "-a" "72c4ced9a10a67f96e9ac1a3d9f9d271679f6714592161f977c6502ddc773fb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "72c4ced9a10a67f96e9ac1a3d9f9d271679f6714592161f977c6502ddc773fb2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72c4ced9a10a67f96e9ac1a3d9f9d271679f6714592161f977c6502ddc773fb2", kill_on_drop: false }`
[INFO] [stdout] 72c4ced9a10a67f96e9ac1a3d9f9d271679f6714592161f977c6502ddc773fb2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1afa4c2033202a6262434e7f50872c4dba7e8ff6d4c23265c071b88ddcf5dba
[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" "b1afa4c2033202a6262434e7f50872c4dba7e8ff6d4c23265c071b88ddcf5dba", kill_on_drop: false }`
[INFO] [stderr]    Compiling approx v0.5.1
[INFO] [stderr]    Compiling nalgebra-macros v0.1.0
[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 00s
[INFO] running `Command { std: "docker" "inspect" "b1afa4c2033202a6262434e7f50872c4dba7e8ff6d4c23265c071b88ddcf5dba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1afa4c2033202a6262434e7f50872c4dba7e8ff6d4c23265c071b88ddcf5dba", kill_on_drop: false }`
[INFO] [stdout] b1afa4c2033202a6262434e7f50872c4dba7e8ff6d4c23265c071b88ddcf5dba
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae8c0b21da0eaceb951510d88c9e7cff0120930f660549d294e8f3284499ecc3
[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" "ae8c0b21da0eaceb951510d88c9e7cff0120930f660549d294e8f3284499ecc3", 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 stable 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" "ae8c0b21da0eaceb951510d88c9e7cff0120930f660549d294e8f3284499ecc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae8c0b21da0eaceb951510d88c9e7cff0120930f660549d294e8f3284499ecc3", kill_on_drop: false }`
[INFO] [stdout] ae8c0b21da0eaceb951510d88c9e7cff0120930f660549d294e8f3284499ecc3