[INFO] fetching crate smlr 0.1.3...
[INFO] testing smlr-0.1.3 against 1.95.0 for beta-1.96-2
[INFO] extracting crate smlr 0.1.3 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate smlr 0.1.3
[INFO] finished tweaking crates.io crate smlr 0.1.3
[INFO] tweaked toml for crates.io crate smlr 0.1.3 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate smlr 0.1.3 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 smlr 0.1.3 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.19
[INFO] [stderr]   Downloaded subtle v2.2.3
[INFO] [stderr]   Downloaded eddie v0.4.2
[INFO] [stderr]   Downloaded clap v2.33.1
[INFO] [stderr]   Downloaded hex v0.4.2
[INFO] [stderr]   Downloaded blake2 v0.9.0
[INFO] [stderr]   Downloaded libc v0.2.74
[INFO] [stderr]   Downloaded syn v1.0.38
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b60e47c25a945dde659bd241892f86dd4f8208b59b8ff3cae6ce8e144ed1735e
[INFO] running `Command { std: "docker" "start" "-a" "b60e47c25a945dde659bd241892f86dd4f8208b59b8ff3cae6ce8e144ed1735e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b60e47c25a945dde659bd241892f86dd4f8208b59b8ff3cae6ce8e144ed1735e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b60e47c25a945dde659bd241892f86dd4f8208b59b8ff3cae6ce8e144ed1735e", kill_on_drop: false }`
[INFO] [stdout] b60e47c25a945dde659bd241892f86dd4f8208b59b8ff3cae6ce8e144ed1735e
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a061c9cbd1945c7159972cde18a0e8d2fb1f6d88b9e3bdd0c515aeb13b5ae2c9
[INFO] running `Command { std: "docker" "start" "-a" "a061c9cbd1945c7159972cde18a0e8d2fb1f6d88b9e3bdd0c515aeb13b5ae2c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling serde_derive v1.0.115
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling serde v1.0.115
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling subtle v2.2.3
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling hex v0.4.2
[INFO] [stderr]    Compiling eddie v0.4.2
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.1
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling digest v0.9.0
[INFO] [stderr]    Compiling blake2 v0.9.0
[INFO] [stderr]    Compiling smlr v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[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 `smlr` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "a061c9cbd1945c7159972cde18a0e8d2fb1f6d88b9e3bdd0c515aeb13b5ae2c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a061c9cbd1945c7159972cde18a0e8d2fb1f6d88b9e3bdd0c515aeb13b5ae2c9", kill_on_drop: false }`
[INFO] [stdout] a061c9cbd1945c7159972cde18a0e8d2fb1f6d88b9e3bdd0c515aeb13b5ae2c9
