[INFO] fetching crate sync-no-std 0.1.5...
[INFO] testing sync-no-std-0.1.5 against 1.99.0-beta.8 for beta-1.100-2
[INFO] extracting crate sync-no-std 0.1.5 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate sync-no-std 0.1.5
[INFO] finished tweaking crates.io crate sync-no-std 0.1.5
[INFO] tweaked toml for crates.io crate sync-no-std 0.1.5 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate sync-no-std 0.1.5 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate sync-no-std 0.1.5 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded panicking v0.7.0
[INFO] [stderr]   Downloaded libc v0.2.178
[INFO] [stderr]   Downloaded winapi v0.3.9
[INFO] [stderr]   Downloaded winapi-i686-pc-windows-gnu v0.4.0
[INFO] [stderr]   Downloaded winapi-x86_64-pc-windows-gnu v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 5f71d4fc6f4a5b4327ed87cf4224b693575a5373d772a00df0bcdce2f26065be
[INFO] running `Command { std: "docker" "start" "5f71d4fc6f4a5b4327ed87cf4224b693575a5373d772a00df0bcdce2f26065be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f71d4fc6f4a5b4327ed87cf4224b693575a5373d772a00df0bcdce2f26065be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5f71d4fc6f4a5b4327ed87cf4224b693575a5373d772a00df0bcdce2f26065be" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f71d4fc6f4a5b4327ed87cf4224b693575a5373d772a00df0bcdce2f26065be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5f71d4fc6f4a5b4327ed87cf4224b693575a5373d772a00df0bcdce2f26065be" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.178
[INFO] [stderr]    Compiling panicking v0.7.0
[INFO] [stderr]    Compiling sync-no-std v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[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 `sync-no-std` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "5f71d4fc6f4a5b4327ed87cf4224b693575a5373d772a00df0bcdce2f26065be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f71d4fc6f4a5b4327ed87cf4224b693575a5373d772a00df0bcdce2f26065be", kill_on_drop: false }`
[INFO] [stdout] 5f71d4fc6f4a5b4327ed87cf4224b693575a5373d772a00df0bcdce2f26065be
