[INFO] fetching crate lark-ty 0.1.0... [INFO] checking lark-ty-0.1.0 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863 [INFO] extracting crate lark-ty 0.1.0 into /workspace/builds/worker-2/source [INFO] validating manifest of crates.io crate lark-ty 0.1.0 on toolchain 36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate lark-ty 0.1.0 [INFO] finished tweaking crates.io crate lark-ty 0.1.0 [INFO] tweaked toml for crates.io crate lark-ty 0.1.0 written to /workspace/builds/worker-2/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 91e7efeb8a19670926d62e711bd64a1b95af1adcf1e1b109065dabf32471bee2 [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" "91e7efeb8a19670926d62e711bd64a1b95af1adcf1e1b109065dabf32471bee2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "91e7efeb8a19670926d62e711bd64a1b95af1adcf1e1b109065dabf32471bee2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "91e7efeb8a19670926d62e711bd64a1b95af1adcf1e1b109065dabf32471bee2", kill_on_drop: false }` [INFO] [stdout] 91e7efeb8a19670926d62e711bd64a1b95af1adcf1e1b109065dabf32471bee2 [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" "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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] dd94b2e687d72f6bd855324d99f120430f8824647f17d4c0ea923112c4a73d3a [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" "dd94b2e687d72f6bd855324d99f120430f8824647f17d4c0ea923112c4a73d3a", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling autocfg v0.1.7 [INFO] [stderr] Checking rand_core v0.4.2 [INFO] [stderr] Compiling proc-macro2 v0.4.30 [INFO] [stderr] Compiling maybe-uninit v2.0.0 [INFO] [stderr] Checking hashbrown v0.9.1 [INFO] [stderr] Compiling syn v1.0.60 [INFO] [stderr] Checking tinyvec_macros v0.1.0 [INFO] [stderr] Compiling unicode-xid v0.1.0 [INFO] [stderr] Checking matches v0.1.8 [INFO] [stderr] Checking stable_deref_trait v1.2.0 [INFO] [stderr] Checking rustc-hash v1.1.0 [INFO] [stderr] Checking scopeguard v0.3.3 [INFO] [stderr] Checking percent-encoding v1.0.1 [INFO] [stderr] Compiling num-derive v0.2.5 [INFO] [stderr] Checking itoa v0.4.7 [INFO] [stderr] Compiling indexmap v1.6.1 [INFO] [stderr] Checking itertools v0.7.11 [INFO] [stderr] Checking unicode-bidi v0.3.4 [INFO] [stderr] Checking tinyvec v1.1.1 [INFO] [stderr] Checking owning_ref v0.4.1 [INFO] [stderr] Checking log v0.4.14 [INFO] [stderr] Compiling parking_lot_core v0.4.0 [INFO] [stderr] Checking serde_json v1.0.62 [INFO] [stderr] Checking rand_core v0.3.1 [INFO] [stderr] Checking rand_os v0.1.3 [INFO] [stderr] Checking rand_jitter v0.1.4 [INFO] [stderr] Checking lock_api v0.1.5 [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] Checking smallvec v0.6.14 [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 unicode-normalization v0.1.16 [INFO] [stderr] Checking render-tree v0.1.1 [INFO] [stderr] Checking lark-debug-with v0.1.0 [INFO] [stderr] Compiling quote v0.6.13 [INFO] [stderr] Checking lark-collections v0.1.0 [INFO] [stderr] Compiling syn v0.15.44 [INFO] [stderr] Checking lark-unify v0.1.0 [INFO] [stderr] Checking idna v0.1.5 [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] Checking url v1.7.2 [INFO] [stderr] Checking url_serde v0.2.0 [INFO] [stderr] Compiling serde_derive v1.0.123 [INFO] [stderr] Compiling derive-new v0.5.8 [INFO] [stderr] Compiling lark-debug-derive v0.1.0 [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 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/lib.rs:147:1 [INFO] [stdout] | [INFO] [stdout] 147 | /// A "universe" is a set of names -- the root universe (U(0)) contains all [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: unused doc comment [INFO] [stdout] --> src/lib.rs:148:1 [INFO] [stdout] | [INFO] [stdout] 148 | /// the "global names"; each time we traverse into a binder, we instantiate a [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [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: unused doc comment [INFO] [stdout] --> src/lib.rs:149:1 [INFO] [stdout] | [INFO] [stdout] 149 | /// new universe (e.g., U(1)) that can see all things from lower universes [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [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: unused doc comment [INFO] [stdout] --> src/lib.rs:150:1 [INFO] [stdout] | [INFO] [stdout] 150 | /// as well as some new placeholders. [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [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:3:12 [INFO] [stdout] | [INFO] [stdout] 3 | #![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: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/declaration.rs:42:34 [INFO] [stdout] | [INFO] [stdout] 42 | pub fn intern_bound_var(db: &AsRef, bv: BoundVar) -> Base { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn AsRef` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused doc comment [INFO] [stdout] --> src/lib.rs:147:1 [INFO] [stdout] | [INFO] [stdout] 147 | /// A "universe" is a set of names -- the root universe (U(0)) contains all [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: unused doc comment [INFO] [stdout] --> src/lib.rs:148:1 [INFO] [stdout] | [INFO] [stdout] 148 | /// the "global names"; each time we traverse into a binder, we instantiate a [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [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: unused doc comment [INFO] [stdout] --> src/lib.rs:149:1 [INFO] [stdout] | [INFO] [stdout] 149 | /// new universe (e.g., U(1)) that can see all things from lower universes [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [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: unused doc comment [INFO] [stdout] --> src/lib.rs:150:1 [INFO] [stdout] | [INFO] [stdout] 150 | /// as well as some new placeholders. [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ rustdoc does not generate documentation for macro invocations [INFO] [stdout] | [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:3:12 [INFO] [stdout] | [INFO] [stdout] 3 | #![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: trait objects without an explicit `dyn` are deprecated [INFO] [stdout] --> src/declaration.rs:42:34 [INFO] [stdout] | [INFO] [stdout] 42 | pub fn intern_bound_var(db: &AsRef, bv: BoundVar) -> Base { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn AsRef` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(bare_trait_objects)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1m 06s [INFO] running `Command { std: "docker" "inspect" "dd94b2e687d72f6bd855324d99f120430f8824647f17d4c0ea923112c4a73d3a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dd94b2e687d72f6bd855324d99f120430f8824647f17d4c0ea923112c4a73d3a", kill_on_drop: false }` [INFO] [stdout] dd94b2e687d72f6bd855324d99f120430f8824647f17d4c0ea923112c4a73d3a