[INFO] fetching crate col_macros 0.2.2...
[INFO] testing col_macros-0.2.2 against 1.55.0 for beta-1.56-1
[INFO] extracting crate col_macros 0.2.2 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate col_macros 0.2.2 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate col_macros 0.2.2
[INFO] finished tweaking crates.io crate col_macros 0.2.2
[INFO] tweaked toml for crates.io crate col_macros 0.2.2 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn_str v0.1.58
[INFO] [stderr]   Downloaded fixed_len_str v0.2.9
[INFO] [stderr]   Downloaded compile_ops v0.1.3
[INFO] [stderr]   Downloaded high_mem_utils v0.2.7
[INFO] [stderr]   Downloaded macro_helper v0.1.6
[INFO] [stderr]   Downloaded fast_new_type v0.1.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 393adf3ebebe541005a78e978f1eed698df0390f4d36f5f96983f5fae6665dea
[INFO] running `Command { std: "docker" "start" "-a" "393adf3ebebe541005a78e978f1eed698df0390f4d36f5f96983f5fae6665dea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "393adf3ebebe541005a78e978f1eed698df0390f4d36f5f96983f5fae6665dea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "393adf3ebebe541005a78e978f1eed698df0390f4d36f5f96983f5fae6665dea", kill_on_drop: false }`
[INFO] [stdout] 393adf3ebebe541005a78e978f1eed698df0390f4d36f5f96983f5fae6665dea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 90773f062b53bd9a4a7f0c0d73e4cc9e9bb132038222d46ae886fb13b80ff801
[INFO] running `Command { std: "docker" "start" "-a" "90773f062b53bd9a4a7f0c0d73e4cc9e9bb132038222d46ae886fb13b80ff801", kill_on_drop: false }`
[INFO] [stderr]    Compiling fixed_len_str v0.2.9
[INFO] [stderr]    Compiling macro_helper v0.1.6
[INFO] [stderr]    Compiling compile_ops v0.1.3
[INFO] [stderr]    Compiling syn_str v0.1.58
[INFO] [stderr]    Compiling fast_new_type v0.1.7
[INFO] [stderr]    Compiling high_mem_utils v0.2.7
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/high_mem_utils-0.2.7/src/lib.rs:2:39
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(vec_leak, untagged_unions, const_fn, const_fn_union)]
[INFO] [stdout]   |                                       ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/high_mem_utils-0.2.7/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(vec_leak, untagged_unions, const_fn, const_fn_union)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `high_mem_utils` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "90773f062b53bd9a4a7f0c0d73e4cc9e9bb132038222d46ae886fb13b80ff801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90773f062b53bd9a4a7f0c0d73e4cc9e9bb132038222d46ae886fb13b80ff801", kill_on_drop: false }`
[INFO] [stdout] 90773f062b53bd9a4a7f0c0d73e4cc9e9bb132038222d46ae886fb13b80ff801