[INFO] fetching crate lark-unify 0.1.0...
[INFO] building lark-unify-0.1.0 against try#d5c88c22807925c189328ef9d923c5d2b11a95b8+rustflags=-Zprofile-closures for pr-87066-3
[INFO] extracting crate lark-unify 0.1.0 into /workspace/builds/worker-67/source
[INFO] validating manifest of crates.io crate lark-unify 0.1.0 on toolchain d5c88c22807925c189328ef9d923c5d2b11a95b8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lark-unify 0.1.0
[INFO] finished tweaking crates.io crate lark-unify 0.1.0
[INFO] tweaked toml for crates.io crate lark-unify 0.1.0 written to /workspace/builds/worker-67/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded lark-collections v0.1.0
[INFO] [stderr]   Downloaded lark-debug-with v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d58c845510829e7c9837d1708c47a7bb56aba294c3ea9294daf0eec2fc610c14
[INFO] running `Command { std: "docker" "start" "-a" "d58c845510829e7c9837d1708c47a7bb56aba294c3ea9294daf0eec2fc610c14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d58c845510829e7c9837d1708c47a7bb56aba294c3ea9294daf0eec2fc610c14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d58c845510829e7c9837d1708c47a7bb56aba294c3ea9294daf0eec2fc610c14", kill_on_drop: false }`
[INFO] [stdout] d58c845510829e7c9837d1708c47a7bb56aba294c3ea9294daf0eec2fc610c14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-67/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 -Zprofile-closures" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 38f2d839b5c97f85cd903fc1c20aab757814d74d3eadfdf18e78248f0a9e07a5
[INFO] running `Command { std: "docker" "start" "-a" "38f2d839b5c97f85cd903fc1c20aab757814d74d3eadfdf18e78248f0a9e07a5", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr] SG_CR_Eslkdjf: autocfg, (d318f0ec49d2844c, 9963dc6836664ff6), 0, 0
[INFO] [stderr] SG_CR_Eslkdjf: autocfg, (10275bade51f3a64, 1a4993f89775eba9), 0, 0
[INFO] [stderr] SG_CR_Eslkdjf: autocfg, (ad71db94d2b0dded, b3dc5e463857ea36), 32, 32
[INFO] [stderr] SG_CR_Eslkdjf: autocfg, (82926ac54d2532ce, 8542c3146f879d7f), 32, 32
[INFO] [stderr] SG_CR_Eslkdjf: autocfg, (47682469233aa24e, 6234a8c7872b30b8), 0, 0
[INFO] [stderr] SG_CR_Eslkdjf: autocfg, (2f2196d24a853f8a, 7c1449fef3a08a41), 8, 16
[INFO] [stderr] SG_CR_Eslkdjf: autocfg, (65e85fdf8a9e1307, 8abe54fcfafac5c9), 0, 0
[INFO] [stderr] SG_CR_Eslkdjf: autocfg, (ece079b67c37958b, 2ad04b3daca5c227), 0, 0
[INFO] [stderr] SG_CR_Eslkdjf: autocfg, (680b341ec5c76adc, 6c9b8c7d6ea4fc6a), 0, 0
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr] SG_CR_Eslkdjf: indexmap, (bf7812008c0a0c0c, 2b7414a7b9b57ce5), 0, 0
[INFO] [stderr]    Compiling lark-debug-with v0.1.0
[INFO] [stderr]    Compiling lark-collections v0.1.0
[INFO] [stderr]    Compiling lark-unify v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[INFO] [stdout]   |            ^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(specialization)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lark-unify` due to 2 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "38f2d839b5c97f85cd903fc1c20aab757814d74d3eadfdf18e78248f0a9e07a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "38f2d839b5c97f85cd903fc1c20aab757814d74d3eadfdf18e78248f0a9e07a5", kill_on_drop: false }`
[INFO] [stdout] 38f2d839b5c97f85cd903fc1c20aab757814d74d3eadfdf18e78248f0a9e07a5