[INFO] fetching crate sleef 0.3.3...
[INFO] testing sleef-0.3.3 against 1.95.0 for beta-1.96-2
[INFO] extracting crate sleef 0.3.3 into /workspace/builds/worker-0-tc1/source
[INFO] removed /workspace/builds/worker-0-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate sleef 0.3.3
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate sleef 0.3.3
[INFO] tweaked toml for crates.io crate sleef 0.3.3 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sleef 0.3.3 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] crate crates.io crate sleef 0.3.3 already has a lockfile, it will not be regenerated
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.17
[INFO] [stderr]   Downloaded getrandom v0.2.11
[INFO] [stderr]   Downloaded az v1.2.1
[INFO] [stderr]   Downloaded wasi v0.11.0+wasi-snapshot-preview1
[INFO] [stderr]   Downloaded doubled v0.3.3
[INFO] [stderr]   Downloaded rug v1.22.0
[INFO] [stderr]   Downloaded libc v0.2.151
[INFO] [stderr]   Downloaded windows-sys v0.42.0
[INFO] [stderr]   Downloaded gmp-mpfr-sys v1.6.1
[INFO] [stderr]   Downloaded cfg-if v1.0.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 68b75e609f6d0c6a7511449a8a00eaa19d974fa067f0b945fffde14f297e7c95
[INFO] running `Command { std: "docker" "start" "-a" "68b75e609f6d0c6a7511449a8a00eaa19d974fa067f0b945fffde14f297e7c95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "68b75e609f6d0c6a7511449a8a00eaa19d974fa067f0b945fffde14f297e7c95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "68b75e609f6d0c6a7511449a8a00eaa19d974fa067f0b945fffde14f297e7c95", kill_on_drop: false }`
[INFO] [stdout] 68b75e609f6d0c6a7511449a8a00eaa19d974fa067f0b945fffde14f297e7c95
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 41b17fd6361f257eea79790aa0f1f6c142e30eb17d02e7f52ecd382d2aac57af
[INFO] running `Command { std: "docker" "start" "-a" "41b17fd6361f257eea79790aa0f1f6c142e30eb17d02e7f52ecd382d2aac57af", kill_on_drop: false }`
[INFO] [stderr]    Compiling doubled v0.3.3
[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/doubled-0.3.3/src/lib.rs:4:31
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(feature = "simd", feature(portable_simd))]
[INFO] [stdout]   |                               ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `doubled` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "41b17fd6361f257eea79790aa0f1f6c142e30eb17d02e7f52ecd382d2aac57af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "41b17fd6361f257eea79790aa0f1f6c142e30eb17d02e7f52ecd382d2aac57af", kill_on_drop: false }`
[INFO] [stdout] 41b17fd6361f257eea79790aa0f1f6c142e30eb17d02e7f52ecd382d2aac57af
