[INFO] fetching crate lark-ty 0.1.0...
[INFO] checking lark-ty-0.1.0 against master#a609fb45efad59dfd459c76e50899be9f0583b5a for pr-80579
[INFO] extracting crate lark-ty 0.1.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate lark-ty 0.1.0 on toolchain a609fb45efad59dfd459c76e50899be9f0583b5a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "read-manifest" "--manifest-path" "Cargo.toml", 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-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2c2ff0a8128ba3a44e8e1665202ec288ff127d5bb91892ed4e69934189f5257
[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" "a2c2ff0a8128ba3a44e8e1665202ec288ff127d5bb91892ed4e69934189f5257", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2c2ff0a8128ba3a44e8e1665202ec288ff127d5bb91892ed4e69934189f5257", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2c2ff0a8128ba3a44e8e1665202ec288ff127d5bb91892ed4e69934189f5257", kill_on_drop: false }`
[INFO] [stdout] a2c2ff0a8128ba3a44e8e1665202ec288ff127d5bb91892ed4e69934189f5257
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+a609fb45efad59dfd459c76e50899be9f0583b5a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 3d9affbc31708f48e9096921a66624d9fad8e4a7822baf6193e4bbf7e8cf7630
[INFO] running `Command { std: "docker" "start" "-a" "3d9affbc31708f48e9096921a66624d9fad8e4a7822baf6193e4bbf7e8cf7630", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.56
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling log v0.4.11
[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 rand_os v0.1.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking tinyvec v1.1.0
[INFO] [stderr]     Checking owning_ref v0.4.1
[INFO] [stderr]     Checking serde_json v1.0.61
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking lark-debug-with v0.1.0
[INFO] [stderr]     Checking unicode-normalization v0.1.16
[INFO] [stderr]     Checking lark-collections v0.1.0
[INFO] [stderr]     Checking render-tree v0.1.1
[INFO] [stderr]     Checking lark-unify v0.1.0
[INFO] [stderr]     Checking parking_lot_core v0.4.0
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking idna v0.1.5
[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]    Compiling lark-debug-derive v0.1.0
[INFO] [stderr]     Checking url_serde v0.2.0
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling derive-new v0.5.8
[INFO] [stderr]     Checking language-reporting v0.3.1
[INFO] [stderr]     Checking languageserver-types v0.53.1
[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 <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] 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<DeclarationTables>, bv: BoundVar) -> Base {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn AsRef<DeclarationTables>`
[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 <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] 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<DeclarationTables>, bv: BoundVar) -> Base {
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn AsRef<DeclarationTables>`
[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 59.90s
[INFO] running `Command { std: "docker" "inspect" "3d9affbc31708f48e9096921a66624d9fad8e4a7822baf6193e4bbf7e8cf7630", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d9affbc31708f48e9096921a66624d9fad8e4a7822baf6193e4bbf7e8cf7630", kill_on_drop: false }`
[INFO] [stdout] 3d9affbc31708f48e9096921a66624d9fad8e4a7822baf6193e4bbf7e8cf7630