[INFO] fetching crate col_macros 0.2.2...
[INFO] documenting col_macros-0.2.2 against nightly for scrape-examples
[INFO] extracting crate col_macros 0.2.2 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate col_macros 0.2.2 on toolchain nightly
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+nightly" "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-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+nightly" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fixed_len_str v0.2.9
[INFO] [stderr]   Downloaded syn_str v0.1.58
[INFO] [stderr]   Downloaded macro_helper v0.1.6
[INFO] [stderr]   Downloaded fast_new_type v0.1.7
[INFO] [stderr]   Downloaded compile_ops v0.1.3
[INFO] [stderr]   Downloaded high_mem_utils v0.2.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 272451676b18c7b2696a24a1ff57c3ddad1244dfce6094f5b4b9dd4243c46a3c
[INFO] running `Command { std: "docker" "start" "-a" "272451676b18c7b2696a24a1ff57c3ddad1244dfce6094f5b4b9dd4243c46a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "272451676b18c7b2696a24a1ff57c3ddad1244dfce6094f5b4b9dd4243c46a3c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "272451676b18c7b2696a24a1ff57c3ddad1244dfce6094f5b4b9dd4243c46a3c", kill_on_drop: false }`
[INFO] [stdout] 272451676b18c7b2696a24a1ff57c3ddad1244dfce6094f5b4b9dd4243c46a3c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:bb5b0feb4f87116a4ea905b7ff5bf5b85913db05e9f0fbc1abdd3168928d9075" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 10ecd99519d89c87a03440b4cae5de0f3283b390c5a476e60b2a788a29186cc9
[INFO] running `Command { std: "docker" "start" "-a" "10ecd99519d89c87a03440b4cae5de0f3283b390c5a476e60b2a788a29186cc9", kill_on_drop: false }`
[INFO] [stderr]    Compiling fixed_len_str v0.2.9
[INFO] [stderr]    Compiling compile_ops v0.1.3
[INFO] [stderr]    Compiling macro_helper v0.1.6
[INFO] [stderr]    Compiling syn_str v0.1.58
[INFO] [stderr]    Compiling fast_new_type v0.1.7
[INFO] [stderr]     Checking 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:2:22
[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: unions with `Copy` and `ManuallyDrop` fields are stable; there is no intent to stabilize more
[INFO] [stdout] 
[INFO] [stdout] 
[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: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `high_mem_utils` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "10ecd99519d89c87a03440b4cae5de0f3283b390c5a476e60b2a788a29186cc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "10ecd99519d89c87a03440b4cae5de0f3283b390c5a476e60b2a788a29186cc9", kill_on_drop: false }`
[INFO] [stdout] 10ecd99519d89c87a03440b4cae5de0f3283b390c5a476e60b2a788a29186cc9