[INFO] fetching crate michelangelo 0.2.5...
[INFO] checking michelangelo-0.2.5 against 1.95.0 for pr-155915
[INFO] extracting crate michelangelo 0.2.5 into /workspace/builds/worker-4-tc1/source
[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-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate michelangelo 0.2.5 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 62 packages to latest compatible versions
[INFO] [stderr]       Adding itertools v0.7.11 (available: v0.14.0)
[INFO] [stderr]       Adding lyon_tessellation v0.11.0 (available: v1.0.20)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bit-vec v0.5.1
[INFO] [stderr]   Downloaded lyon_geom v0.11.1
[INFO] [stderr]   Downloaded stable-vec v0.3.2
[INFO] [stderr]   Downloaded descartes v0.1.20
[INFO] [stderr]   Downloaded lyon_path v0.11.0
[INFO] [stderr]   Downloaded sid v0.5.2
[INFO] [stderr]   Downloaded simple_allocator_trait v0.1.0
[INFO] [stderr]   Downloaded ordered-float v0.5.2
[INFO] [stderr]   Downloaded compact v0.2.16
[INFO] [stderr]   Downloaded compact_macros v0.1.0
[INFO] [stderr]   Downloaded euclid v0.18.2
[INFO] [stderr]   Downloaded lyon_tessellation v0.11.0
[INFO] [stderr]   Downloaded nalgebra v0.20.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5bec3d6a026fd89e14c46b6c38965837b5c7b0bf5dfe9592cda12b1f578bd25b
[INFO] running `Command { std: "docker" "start" "-a" "5bec3d6a026fd89e14c46b6c38965837b5c7b0bf5dfe9592cda12b1f578bd25b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5bec3d6a026fd89e14c46b6c38965837b5c7b0bf5dfe9592cda12b1f578bd25b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bec3d6a026fd89e14c46b6c38965837b5c7b0bf5dfe9592cda12b1f578bd25b", kill_on_drop: false }`
[INFO] [stdout] 5bec3d6a026fd89e14c46b6c38965837b5c7b0bf5dfe9592cda12b1f578bd25b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8030cfbf1ed8c20c1aa7c4a58c77c8ee8a14303790c46a59c085ab04c0bb1e91
[INFO] running `Command { std: "docker" "start" "-a" "8030cfbf1ed8c20c1aa7c4a58c77c8ee8a14303790c46a59c085ab04c0bb1e91", kill_on_drop: false }`
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking hamming v0.1.3
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]     Checking primal-bit v0.2.4
[INFO] [stderr]     Checking euclid v0.18.2
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking primal-estimate v0.2.1
[INFO] [stderr]     Checking matrixmultiply v0.2.4
[INFO] [stderr]     Checking primal-check v0.2.3
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking bit-vec v0.5.1
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking primal-sieve v0.2.9
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking ordered-float v0.5.2
[INFO] [stderr]     Checking stable-vec v0.3.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking sid v0.5.2
[INFO] [stderr]     Checking lyon_geom v0.11.1
[INFO] [stderr]     Checking alga v0.9.3
[INFO] [stderr]     Checking simple_allocator_trait v0.1.0
[INFO] [stderr]     Checking primal v0.2.3
[INFO] [stderr]     Checking lyon_path v0.11.0
[INFO] [stderr]     Checking compact v0.2.16
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/compact-0.2.16/src/lib.rs:17:1
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking lyon_tessellation v0.11.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `compact` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "8030cfbf1ed8c20c1aa7c4a58c77c8ee8a14303790c46a59c085ab04c0bb1e91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8030cfbf1ed8c20c1aa7c4a58c77c8ee8a14303790c46a59c085ab04c0bb1e91", kill_on_drop: false }`
[INFO] [stdout] 8030cfbf1ed8c20c1aa7c4a58c77c8ee8a14303790c46a59c085ab04c0bb1e91