[INFO] fetching crate michelangelo 0.2.5...
[INFO] testing michelangelo-0.2.5 against 1.54.0 for beta-1.55-1
[INFO] extracting crate michelangelo 0.2.5 into /workspace/builds/worker-118/source
[INFO] validating manifest of crates.io crate michelangelo 0.2.5 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate michelangelo 0.2.5
[INFO] finished tweaking crates.io crate michelangelo 0.2.5
[INFO] tweaked toml for crates.io crate michelangelo 0.2.5 written to /workspace/builds/worker-118/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8eec1ff7ee3e877729b91696736f9c6b238d9714d5931b7d8a999a530b1a58c1
[INFO] running `Command { std: "docker" "start" "-a" "8eec1ff7ee3e877729b91696736f9c6b238d9714d5931b7d8a999a530b1a58c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8eec1ff7ee3e877729b91696736f9c6b238d9714d5931b7d8a999a530b1a58c1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eec1ff7ee3e877729b91696736f9c6b238d9714d5931b7d8a999a530b1a58c1", kill_on_drop: false }`
[INFO] [stdout] 8eec1ff7ee3e877729b91696736f9c6b238d9714d5931b7d8a999a530b1a58c1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-118/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 203e22b409656fba666a624d3253e092dde2f8a5ed9bcfb3378c337f0a5989e0
[INFO] running `Command { std: "docker" "start" "-a" "203e22b409656fba666a624d3253e092dde2f8a5ed9bcfb3378c337f0a5989e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling hamming v0.1.3
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling primal-estimate v0.2.1
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling rawpointer v0.2.1
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling simple_allocator_trait v0.1.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling matrixmultiply v0.2.4
[INFO] [stderr]    Compiling primal-bit v0.2.4
[INFO] [stderr]    Compiling stable-vec v0.3.2
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling primal-sieve v0.2.9
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling generic-array v0.13.3
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling compact_macros v0.1.0
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling approx v0.3.2
[INFO] [stderr]    Compiling euclid v0.18.2
[INFO] [stderr]    Compiling sid v0.5.2
[INFO] [stderr]    Compiling ordered-float v0.5.2
[INFO] [stderr]    Compiling primal-check v0.2.3
[INFO] [stderr]    Compiling rand_distr v0.2.2
[INFO] [stderr]    Compiling primal v0.2.3
[INFO] [stderr]    Compiling compact v0.2.16
[INFO] [stderr]    Compiling alga v0.9.3
[INFO] [stderr]    Compiling lyon_geom v0.11.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/compact-0.2.16/src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `compact`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "203e22b409656fba666a624d3253e092dde2f8a5ed9bcfb3378c337f0a5989e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "203e22b409656fba666a624d3253e092dde2f8a5ed9bcfb3378c337f0a5989e0", kill_on_drop: false }`
[INFO] [stdout] 203e22b409656fba666a624d3253e092dde2f8a5ed9bcfb3378c337f0a5989e0
