[INFO] cloning repository https://github.com/michaelgerakis/blackberry
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/michaelgerakis/blackberry" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelgerakis%2Fblackberry", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelgerakis%2Fblackberry'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f96e0c7eaafd9e64142d9bb4b87f33eb3a17c3e5
[INFO] testing michaelgerakis/blackberry against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmichaelgerakis%2Fblackberry" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/michaelgerakis/blackberry on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-15/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/michaelgerakis/blackberry
[INFO] finished tweaking git repo https://github.com/michaelgerakis/blackberry
[INFO] tweaked toml for git repo https://github.com/michaelgerakis/blackberry written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/michaelgerakis/blackberry already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a3203baab902229c84f4c07e7cbb293d3fe138e63fb1dfe935520969230e039f
[INFO] running `Command { std: "docker" "start" "-a" "a3203baab902229c84f4c07e7cbb293d3fe138e63fb1dfe935520969230e039f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a3203baab902229c84f4c07e7cbb293d3fe138e63fb1dfe935520969230e039f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3203baab902229c84f4c07e7cbb293d3fe138e63fb1dfe935520969230e039f", kill_on_drop: false }`
[INFO] [stdout] a3203baab902229c84f4c07e7cbb293d3fe138e63fb1dfe935520969230e039f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4f8fb25a014cde3e15250614d1888486be2a25aff78788599b0888f5ca7e4fb
[INFO] running `Command { std: "docker" "start" "-a" "c4f8fb25a014cde3e15250614d1888486be2a25aff78788599b0888f5ca7e4fb", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling volatile v0.1.0 (/opt/rustwide/workdir/volatile)
[INFO] [stderr]    Compiling stack-vec v0.1.1 (/opt/rustwide/workdir/stack-vec)
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]  --> volatile/src/traits.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     #[inline(always)]
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` is ignored on function prototypes
[INFO] [stdout]   --> volatile/src/traits.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     #[inline(always)]
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling pi v0.1.0 (/opt/rustwide/workdir/pi)
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> pi/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(untagged_unions)]
[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 `pi` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "c4f8fb25a014cde3e15250614d1888486be2a25aff78788599b0888f5ca7e4fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4f8fb25a014cde3e15250614d1888486be2a25aff78788599b0888f5ca7e4fb", kill_on_drop: false }`
[INFO] [stdout] c4f8fb25a014cde3e15250614d1888486be2a25aff78788599b0888f5ca7e4fb