[INFO] fetching crate lark-type-check 0.1.0... [INFO] checking lark-type-check-0.1.0 against master#0d37dca25a51fb900a402c94c8818ad1c2789e30 for pr-77526 [INFO] extracting crate lark-type-check 0.1.0 into /workspace/builds/worker-7/source [INFO] validating manifest of crates.io crate lark-type-check 0.1.0 on toolchain 0d37dca25a51fb900a402c94c8818ad1c2789e30 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking crates.io crate lark-type-check 0.1.0 [INFO] finished tweaking crates.io crate lark-type-check 0.1.0 [INFO] tweaked toml for crates.io crate lark-type-check 0.1.0 written to /workspace/builds/worker-7/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "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" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "fetch" "--locked" "--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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] dcfd1347be72d380f73d2e43371702517c4377658be484eb49859e2c3a5349b7 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "dcfd1347be72d380f73d2e43371702517c4377658be484eb49859e2c3a5349b7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "dcfd1347be72d380f73d2e43371702517c4377658be484eb49859e2c3a5349b7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dcfd1347be72d380f73d2e43371702517c4377658be484eb49859e2c3a5349b7", kill_on_drop: false }` [INFO] [stdout] dcfd1347be72d380f73d2e43371702517c4377658be484eb49859e2c3a5349b7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+0d37dca25a51fb900a402c94c8818ad1c2789e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 221a9797be71e742184230f6e25fab2f7ecfd8c014729d227ec721a4f4b710df [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "221a9797be71e742184230f6e25fab2f7ecfd8c014729d227ec721a4f4b710df", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Checking rand_core v0.4.2 [INFO] [stderr] Compiling autocfg v0.1.7 [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Compiling proc-macro2 v1.0.24 [INFO] [stderr] Compiling semver-parser v0.7.0 [INFO] [stderr] Compiling libc v0.2.79 [INFO] [stderr] Compiling unicode-xid v0.2.1 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Compiling syn v1.0.42 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Checking hashbrown v0.9.1 [INFO] [stderr] Compiling serde v1.0.116 [INFO] [stderr] Checking stable_deref_trait v1.2.0 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Checking cfg-if v0.1.10 [INFO] [stderr] Checking rustc-hash v1.1.0 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Checking scopeguard v0.3.3 [INFO] [stderr] Checking tinyvec v0.3.4 [INFO] [stderr] Checking matches v0.1.8 [INFO] [stderr] Compiling serde_derive v1.0.116 [INFO] [stderr] Compiling ryu v1.0.5 [INFO] [stderr] Checking percent-encoding v1.0.1 [INFO] [stderr] Compiling bitflags v1.2.1 [INFO] [stderr] Compiling serde_json v1.0.58 [INFO] [stderr] Checking termcolor v1.1.0 [INFO] [stderr] Checking itoa v0.4.6 [INFO] [stderr] Checking datafrog v2.0.1 [INFO] [stderr] Checking generational-arena v0.2.8 [INFO] [stderr] Checking owning_ref v0.4.1 [INFO] [stderr] Compiling semver v0.9.0 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Checking rand_jitter v0.1.4 [INFO] [stderr] Checking itertools v0.7.11 [INFO] [stderr] Checking unicode-bidi v0.3.4 [INFO] [stderr] Checking unicode-normalization v0.1.13 [INFO] [stderr] Checking log v0.4.11 [INFO] [stderr] Checking rand_xorshift v0.1.1 [INFO] [stderr] Checking rand_hc v0.1.0 [INFO] [stderr] Checking rand_isaac v0.1.1 [INFO] [stderr] Compiling rand_pcg v0.1.2 [INFO] [stderr] Compiling rand_chacha v0.1.1 [INFO] [stderr] Compiling rand v0.6.5 [INFO] [stderr] Checking lock_api v0.1.5 [INFO] [stderr] Compiling indexmap v1.6.0 [INFO] [stderr] Compiling num-traits v0.2.12 [INFO] [stderr] Checking smallvec v0.6.13 [INFO] [stderr] Compiling rustc_version v0.2.3 [INFO] [stderr] Compiling parking_lot_core v0.4.0 [INFO] [stderr] Compiling quote v1.0.7 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Checking lark-debug-with v0.1.0 [INFO] [stderr] Checking idna v0.1.5 [INFO] [stderr] Checking render-tree v0.1.1 [INFO] [stderr] Checking lark-collections v0.1.0 [INFO] [stderr] Checking lark-unify v0.1.0 [INFO] [stderr] Checking url v1.7.2 [INFO] [stderr] Checking parking_lot v0.7.1 [INFO] [stderr] Checking lark-intern v0.1.0 [INFO] [stderr] Checking lark-string v0.1.0 [INFO] [stderr] Compiling num-derive v0.2.5 [INFO] [stderr] Compiling lark-debug-derive v0.1.0 [INFO] [stderr] Compiling derive-new v0.5.8 [INFO] [stderr] Checking url_serde v0.2.0 [INFO] [stderr] Checking salsa v0.9.2 [INFO] [stderr] Checking languageserver-types v0.53.1 [INFO] [stderr] Checking language-reporting v0.3.1 [INFO] [stderr] Checking lark-span v0.1.0 [INFO] [stderr] Checking lark-error v0.1.0 [INFO] [stderr] Checking lark-entity v0.1.0 [INFO] [stderr] Checking lark-ty v0.1.0 [INFO] [stderr] Checking lark-hir v0.1.0 [INFO] [stderr] Checking lark-parser v0.1.0 [INFO] [stderr] Checking lark-pretty-print v0.1.0 [INFO] [stderr] Checking lark-type-check v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/full_inference/perm.rs:9:1 [INFO] [stdout] | [INFO] [stdout] 9 | /// An intern'd permission. [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion [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:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | #![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] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/full_inference/perm.rs:9:1 [INFO] [stdout] | [INFO] [stdout] 9 | /// An intern'd permission. [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_doc_comments)]` on by default [INFO] [stdout] = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion [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:5:12 [INFO] [stdout] | [INFO] [stdout] 5 | #![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] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Placeholder` [INFO] [stdout] --> src/full_inference/perm.rs:29:5 [INFO] [stdout] | [INFO] [stdout] 29 | Placeholder(Placeholder), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `Placeholder` [INFO] [stdout] --> src/full_inference/perm.rs:29:5 [INFO] [stdout] | [INFO] [stdout] 29 | Placeholder(Placeholder), [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 34s [INFO] running `Command { std: "docker" "inspect" "221a9797be71e742184230f6e25fab2f7ecfd8c014729d227ec721a4f4b710df", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "221a9797be71e742184230f6e25fab2f7ecfd8c014729d227ec721a4f4b710df", kill_on_drop: false }` [INFO] [stdout] 221a9797be71e742184230f6e25fab2f7ecfd8c014729d227ec721a4f4b710df