[INFO] fetching crate gramma 0.1.1...
[INFO] checking gramma-0.1.1 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate gramma 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate gramma 0.1.1 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gramma 0.1.1
[INFO] finished tweaking crates.io crate gramma 0.1.1
[INFO] tweaked toml for crates.io crate gramma 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 243048ca8681f7e4f3a0bdb607fc10124b0c9bd8b8dbe19316e6089c9b60158f
[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" "243048ca8681f7e4f3a0bdb607fc10124b0c9bd8b8dbe19316e6089c9b60158f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "243048ca8681f7e4f3a0bdb607fc10124b0c9bd8b8dbe19316e6089c9b60158f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "243048ca8681f7e4f3a0bdb607fc10124b0c9bd8b8dbe19316e6089c9b60158f", kill_on_drop: false }`
[INFO] [stdout] 243048ca8681f7e4f3a0bdb607fc10124b0c9bd8b8dbe19316e6089c9b60158f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 34ed2b26011476842c8f76e941efc2776b7b671699073a5dd33e9d83129efbad
[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" "34ed2b26011476842c8f76e941efc2776b7b671699073a5dd33e9d83129efbad", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling thiserror-impl v1.0.26
[INFO] [stderr]     Checking thiserror v1.0.26
[INFO] [stderr]     Checking gramma v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unknown `doc` attribute `Hidden`
[INFO] [stdout]    --> src/lex.rs:245:7
[INFO] [stdout]     |
[INFO] [stdout] 245 | #[doc(Hidden)]
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `Hidden`
[INFO] [stdout]    --> src/lex.rs:245:7
[INFO] [stdout]     |
[INFO] [stdout] 245 | #[doc(Hidden)]
[INFO] [stdout]     |       ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.89s
[INFO] running `Command { std: "docker" "inspect" "34ed2b26011476842c8f76e941efc2776b7b671699073a5dd33e9d83129efbad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34ed2b26011476842c8f76e941efc2776b7b671699073a5dd33e9d83129efbad", kill_on_drop: false }`
[INFO] [stdout] 34ed2b26011476842c8f76e941efc2776b7b671699073a5dd33e9d83129efbad