[INFO] fetching crate synfx-dsp 0.5.6...
[INFO] testing synfx-dsp-0.5.6 against 1.95.0 for beta-1.96-2
[INFO] extracting crate synfx-dsp 0.5.6 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate synfx-dsp 0.5.6
[INFO] finished tweaking crates.io crate synfx-dsp 0.5.6
[INFO] tweaked toml for crates.io crate synfx-dsp 0.5.6 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate synfx-dsp 0.5.6 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 2 packages to latest compatible versions
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] ff026e05224fad082de2830f4f487cca7d3207b9206ae2182f379a4e663eefc1
[INFO] running `Command { std: "docker" "start" "-a" "ff026e05224fad082de2830f4f487cca7d3207b9206ae2182f379a4e663eefc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff026e05224fad082de2830f4f487cca7d3207b9206ae2182f379a4e663eefc1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff026e05224fad082de2830f4f487cca7d3207b9206ae2182f379a4e663eefc1", kill_on_drop: false }`
[INFO] [stdout] ff026e05224fad082de2830f4f487cca7d3207b9206ae2182f379a4e663eefc1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] e00f41d29dcf114548cd6d7408a47c07bf599e8857abb65c58e2073b5834e735
[INFO] running `Command { std: "docker" "start" "-a" "e00f41d29dcf114548cd6d7408a47c07bf599e8857abb65c58e2073b5834e735", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling synfx-dsp v0.5.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:230:1
[INFO] [stdout]     |
[INFO] [stdout] 230 | #![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 `synfx-dsp` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "e00f41d29dcf114548cd6d7408a47c07bf599e8857abb65c58e2073b5834e735", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e00f41d29dcf114548cd6d7408a47c07bf599e8857abb65c58e2073b5834e735", kill_on_drop: false }`
[INFO] [stdout] e00f41d29dcf114548cd6d7408a47c07bf599e8857abb65c58e2073b5834e735
