[INFO] fetching crate fimg 0.4.28...
[INFO] testing fimg-0.4.28 against 1.75.0 for beta-1.76-1
[INFO] extracting crate fimg 0.4.28 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate fimg 0.4.28 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-1-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate fimg 0.4.28
[INFO] finished tweaking crates.io crate fimg 0.4.28
[INFO] tweaked toml for crates.io crate fimg 0.4.28 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded imgref-iter v0.4.0
[INFO] [stderr]   Downloaded vecto v0.1.1
[INFO] [stderr]   Downloaded imgref v1.10.0
[INFO] [stderr]   Downloaded umath v0.0.7
[INFO] [stderr]   Downloaded mattr v0.0.2
[INFO] [stderr]   Downloaded clipline v0.1.2
[INFO] [stderr]   Downloaded fer v0.1.1
[INFO] [stderr]   Downloaded minifb v0.25.0
[INFO] [stderr]   Downloaded slur v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 79b8ef28af594e0325ac50569ea188ec1ced83dcb8b9772812d56a78dddbe858
[INFO] running `Command { std: "docker" "start" "-a" "79b8ef28af594e0325ac50569ea188ec1ced83dcb8b9772812d56a78dddbe858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "79b8ef28af594e0325ac50569ea188ec1ced83dcb8b9772812d56a78dddbe858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "79b8ef28af594e0325ac50569ea188ec1ced83dcb8b9772812d56a78dddbe858", kill_on_drop: false }`
[INFO] [stdout] 79b8ef28af594e0325ac50569ea188ec1ced83dcb8b9772812d56a78dddbe858
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f33852e13769add2c1c893f69d56e1551c1d1f6509cbe1fbbe2281a6b9ae2c8
[INFO] running `Command { std: "docker" "start" "-a" "1f33852e13769add2c1c893f69d56e1551c1d1f6509cbe1fbbe2281a6b9ae2c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling crc32fast v1.3.2
[INFO] [stderr]    Compiling simd-adler32 v0.3.7
[INFO] [stderr]    Compiling umath v0.0.7
[INFO] [stderr]    Compiling fer v0.1.1
[INFO] [stderr]    Compiling clipline v0.1.2
[INFO] [stderr]    Compiling mattr v0.0.2
[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-6f17d22bba15001f/umath-0.0.7/src/lib.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | #![feature(core_intrinsics)]
[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 `umath` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1f33852e13769add2c1c893f69d56e1551c1d1f6509cbe1fbbe2281a6b9ae2c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f33852e13769add2c1c893f69d56e1551c1d1f6509cbe1fbbe2281a6b9ae2c8", kill_on_drop: false }`
[INFO] [stdout] 1f33852e13769add2c1c893f69d56e1551c1d1f6509cbe1fbbe2281a6b9ae2c8
