[INFO] fetching crate sigmah 0.6.1...
[INFO] testing sigmah-0.6.1 against 1.95.0 for beta-1.96-2
[INFO] extracting crate sigmah 0.6.1 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate sigmah 0.6.1
[INFO] finished tweaking crates.io crate sigmah 0.6.1
[INFO] tweaked toml for crates.io crate sigmah 0.6.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sigmah 0.6.1 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 24 packages to latest compatible versions
[INFO] [stderr]       Adding multiversion v0.7.4 (available: v0.8.0)
[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 multiversion-macros v0.7.4
[INFO] [stderr]   Downloaded multiversion v0.7.4
[INFO] [stderr]   Downloaded target-features v0.1.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] fb787aa9143abe505ce04a1f2bce8058ab6bd9b0e4a50185d052e5a94b0399a1
[INFO] running `Command { std: "docker" "start" "-a" "fb787aa9143abe505ce04a1f2bce8058ab6bd9b0e4a50185d052e5a94b0399a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fb787aa9143abe505ce04a1f2bce8058ab6bd9b0e4a50185d052e5a94b0399a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb787aa9143abe505ce04a1f2bce8058ab6bd9b0e4a50185d052e5a94b0399a1", kill_on_drop: false }`
[INFO] [stdout] fb787aa9143abe505ce04a1f2bce8058ab6bd9b0e4a50185d052e5a94b0399a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 959377a383b23ee9276a2b3d3c0b6825b7f262ea8a080c2c5a9ee3b97cab6fca
[INFO] running `Command { std: "docker" "start" "-a" "959377a383b23ee9276a2b3d3c0b6825b7f262ea8a080c2c5a9ee3b97cab6fca", kill_on_drop: false }`
[INFO] [stderr]    Compiling target-features v0.1.6
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling bitvec v1.0.1
[INFO] [stderr]    Compiling multiversion-macros v0.7.4
[INFO] [stderr]    Compiling multiversion v0.7.4
[INFO] [stderr]    Compiling sigmah v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:6:1
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![feature(generic_const_exprs)]
[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 `sigmah` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "959377a383b23ee9276a2b3d3c0b6825b7f262ea8a080c2c5a9ee3b97cab6fca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "959377a383b23ee9276a2b3d3c0b6825b7f262ea8a080c2c5a9ee3b97cab6fca", kill_on_drop: false }`
[INFO] [stdout] 959377a383b23ee9276a2b3d3c0b6825b7f262ea8a080c2c5a9ee3b97cab6fca
