[INFO] fetching crate ribozyme 0.4.0...
[INFO] checking ribozyme-0.4.0 against master#36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923 for pr-81863
[INFO] extracting crate ribozyme 0.4.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate ribozyme 0.4.0 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 ribozyme 0.4.0
[INFO] finished tweaking crates.io crate ribozyme 0.4.0
[INFO] tweaked toml for crates.io crate ribozyme 0.4.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate crates.io crate ribozyme 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a454ff1baed2dc2dfece769f658202fd74f807f6d035b6c9f9ed9417ad6df56f
[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" "a454ff1baed2dc2dfece769f658202fd74f807f6d035b6c9f9ed9417ad6df56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a454ff1baed2dc2dfece769f658202fd74f807f6d035b6c9f9ed9417ad6df56f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a454ff1baed2dc2dfece769f658202fd74f807f6d035b6c9f9ed9417ad6df56f", kill_on_drop: false }`
[INFO] [stdout] a454ff1baed2dc2dfece769f658202fd74f807f6d035b6c9f9ed9417ad6df56f
[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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+36ecbc94eb6be90bc38b2d0fdd4bfac3f34d9923" "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] 95fe81211585eacec58077eef3e730eb8ed47c2186f42048838fe6378a58dc70
[INFO] running `Command { std: "docker" "start" "-a" "95fe81211585eacec58077eef3e730eb8ed47c2186f42048838fe6378a58dc70", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.35
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling pkg-config v0.3.18
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking podio v0.1.7
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.3
[INFO] [stderr]    Compiling proc-macro-error v1.0.3
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking miniz_oxide v0.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking lexical-core v0.7.4
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling bzip2-sys v0.1.9+1.0.8
[INFO] [stderr]     Checking flate2 v1.0.16
[INFO] [stderr]     Checking aho-corasick v0.7.13
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking nom v5.1.2
[INFO] [stderr]     Checking bzip2 v0.3.3
[INFO] [stderr]     Checking zip v0.5.6
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking zip-extensions v0.4.0
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking superfusion v0.1.4
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking serde_json v1.0.56
[INFO] [stderr]     Checking ribozyme v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant is never constructed: `BlockState`
[INFO] [stdout]   --> src/namespace/mod.rs:13:2
[INFO] [stdout]    |
[INFO] [stdout] 13 |     BlockState,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lang`
[INFO] [stdout]   --> src/namespace/mod.rs:16:2
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Lang,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Font`
[INFO] [stdout]   --> src/namespace/mod.rs:17:2
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Font,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `BlockState`
[INFO] [stdout]   --> src/namespace/mod.rs:13:2
[INFO] [stdout]    |
[INFO] [stdout] 13 |     BlockState,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Lang`
[INFO] [stdout]   --> src/namespace/mod.rs:16:2
[INFO] [stdout]    |
[INFO] [stdout] 16 |     Lang,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Font`
[INFO] [stdout]   --> src/namespace/mod.rs:17:2
[INFO] [stdout]    |
[INFO] [stdout] 17 |     Font,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 04s
[INFO] running `Command { std: "docker" "inspect" "95fe81211585eacec58077eef3e730eb8ed47c2186f42048838fe6378a58dc70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95fe81211585eacec58077eef3e730eb8ed47c2186f42048838fe6378a58dc70", kill_on_drop: false }`
[INFO] [stdout] 95fe81211585eacec58077eef3e730eb8ed47c2186f42048838fe6378a58dc70