[INFO] cloning repository https://github.com/lark-exploration/lark [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lark-exploration/lark" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flark-exploration%2Flark", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flark-exploration%2Flark'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 87d1e42107ced29f5ef23b70ef66e3b6fa2e74de [INFO] checking lark-exploration/lark against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flark-exploration%2Flark" "/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/lark-exploration/lark on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "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/lark-exploration/lark [INFO] finished tweaking git repo https://github.com/lark-exploration/lark [INFO] tweaked toml for git repo https://github.com/lark-exploration/lark written to /workspace/builds/worker-15/source/Cargo.toml [INFO] crate git repo https://github.com/lark-exploration/lark already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a131869b7af393a6cc35f4b2fe43b59cd94b9994f1e7b4cb757648ed3dc3a0cb [INFO] running `Command { std: "docker" "start" "-a" "a131869b7af393a6cc35f4b2fe43b59cd94b9994f1e7b4cb757648ed3dc3a0cb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a131869b7af393a6cc35f4b2fe43b59cd94b9994f1e7b4cb757648ed3dc3a0cb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a131869b7af393a6cc35f4b2fe43b59cd94b9994f1e7b4cb757648ed3dc3a0cb", kill_on_drop: false }` [INFO] [stdout] a131869b7af393a6cc35f4b2fe43b59cd94b9994f1e7b4cb757648ed3dc3a0cb [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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 967be24bc09987306750bb4b65d191a425af22b5249437ef21f0f37f96deb356 [INFO] running `Command { std: "docker" "start" "-a" "967be24bc09987306750bb4b65d191a425af22b5249437ef21f0f37f96deb356", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.47 [INFO] [stderr] Compiling proc-macro2 v0.4.25 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling syn v0.15.33 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Compiling serde v1.0.84 [INFO] [stderr] Compiling num-derive v0.2.3 [INFO] [stderr] Compiling unicode-segmentation v1.2.1 [INFO] [stderr] Checking cfg-if v0.1.6 [INFO] [stderr] Checking rand_core v0.3.0 [INFO] [stderr] Checking scopeguard v0.3.3 [INFO] [stderr] Checking indexmap v1.0.2 [INFO] [stderr] Checking byteorder v1.2.7 [INFO] [stderr] Checking void v1.0.2 [INFO] [stderr] Checking stable_deref_trait v1.1.1 [INFO] [stderr] Checking matches v0.1.8 [INFO] [stderr] Checking unicode-normalization v0.1.7 [INFO] [stderr] Checking percent-encoding v1.0.1 [INFO] [stderr] Checking itoa v0.4.3 [INFO] [stderr] Checking bitflags v1.0.4 [INFO] [stderr] Compiling version_check v0.1.5 [INFO] [stderr] Checking either v1.5.0 [INFO] [stderr] Checking termcolor v1.0.4 [INFO] [stderr] Compiling num-integer v0.1.39 [INFO] [stderr] Compiling regex v1.1.0 [INFO] [stderr] Compiling rayon-core v1.4.1 [INFO] [stderr] Checking lazy_static v1.2.0 [INFO] [stderr] Checking datafrog v2.0.1 [INFO] [stderr] Compiling rayon v1.0.3 [INFO] [stderr] Checking ucd-util v0.1.3 [INFO] [stderr] Checking utf8-ranges v1.0.2 [INFO] [stderr] Checking remove_dir_all v0.5.1 [INFO] [stderr] Checking nodrop v0.1.13 [INFO] [stderr] Checking cc v1.0.28 [INFO] [stderr] Checking quick-error v1.2.2 [INFO] [stderr] Compiling memoffset v0.2.1 [INFO] [stderr] Checking glob v0.2.11 [INFO] [stderr] Compiling same-file v1.0.4 [INFO] [stderr] Compiling diff v0.1.11 [INFO] [stderr] Compiling unindent v0.1.3 [INFO] [stderr] Compiling rand v0.6.4 [INFO] [stderr] Compiling num-traits v0.2.6 [INFO] [stderr] Compiling ryu v0.2.7 [INFO] [stderr] Compiling arrayvec v0.4.10 [INFO] [stderr] Checking generational-arena v0.2.0 [INFO] [stderr] Checking crossbeam-utils v0.2.2 [INFO] [stderr] Checking owning_ref v0.4.0 [INFO] [stderr] Checking log v0.4.6 [INFO] [stderr] Checking unreachable v1.0.0 [INFO] [stderr] Checking unicode-bidi v0.3.4 [INFO] [stderr] Checking lark-debug-with v0.1.0 (/opt/rustwide/workdir/components/lark-debug-with) [INFO] [stderr] Checking itertools v0.7.11 [INFO] [stderr] Checking itertools v0.8.0 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Compiling rand_hc v0.1.0 [INFO] [stderr] Compiling rand_isaac v0.1.1 [INFO] [stderr] Compiling rand_xorshift v0.1.1 [INFO] [stderr] Checking rustc-hash v1.0.1 [INFO] [stderr] Checking thread_local v0.3.6 [INFO] [stderr] Compiling regex-syntax v0.6.4 [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> components/lark-debug-with/src/lib.rs:9:12 [INFO] [stdout] | [INFO] [stdout] 9 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking humantime v1.2.0 [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> components/lark-debug-with/src/lib.rs:9:12 [INFO] [stdout] | [INFO] [stdout] 9 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling walkdir v2.2.7 [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling heck v0.3.1 [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> components/lark-debug-with/src/lib.rs:9:12 [INFO] [stdout] | [INFO] [stdout] 9 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [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] --> components/lark-debug-with/src/lib.rs:9:12 [INFO] [stdout] | [INFO] [stdout] 9 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking smallvec v0.6.7 [INFO] [stderr] Checking lock_api v0.1.5 [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling memchr v2.1.2 [INFO] [stderr] Checking lark-collections v0.1.0 (/opt/rustwide/workdir/components/lark-collections) [INFO] [stderr] Checking idna v0.1.5 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> components/lark-collections/src/lib.rs:4:12 [INFO] [stdout] | [INFO] [stdout] 4 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [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] --> components/lark-collections/src/lib.rs:4:12 [INFO] [stdout] | [INFO] [stdout] 4 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking crossbeam-epoch v0.3.1 [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling render-tree v0.1.1 [INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes [INFO] [stdout] --> components/lark-collections/src/lib.rs:4:12 [INFO] [stdout] | [INFO] [stdout] 4 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #31844 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking lark-unify v0.1.0 (/opt/rustwide/workdir/components/lark-unify) [INFO] [stdout] error[E0557]: feature has been removed [INFO] [stdout] --> components/lark-unify/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] --> components/lark-unify/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 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [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] --> components/lark-collections/src/lib.rs:4:12 [INFO] [stdout] | [INFO] [stdout] 4 | #![feature(specialization)] [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(incomplete_features)]` on by default [INFO] [stdout] = note: see issue #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[E0557]: feature has been removed [INFO] [stdout] --> components/lark-unify/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] --> components/lark-unify/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 for more information [INFO] [stdout] = help: consider using `min_specialization` instead, which is more stable and complete [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Checking url v1.7.2 [INFO] [stderr] error: could not compile `lark-unify` due to 2 previous errors; 1 warning emitted [INFO] [stdout] error: aborting due to previous error; 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] For more information about this error, try `rustc --explain E0557`. [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] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] running `Command { std: "docker" "inspect" "967be24bc09987306750bb4b65d191a425af22b5249437ef21f0f37f96deb356", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "967be24bc09987306750bb4b65d191a425af22b5249437ef21f0f37f96deb356", kill_on_drop: false }` [INFO] [stdout] 967be24bc09987306750bb4b65d191a425af22b5249437ef21f0f37f96deb356