[INFO] cloning repository https://github.com/neverRare/butter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/neverRare/butter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FneverRare%2Fbutter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FneverRare%2Fbutter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dddd324d0f207d2744a3d61d48d5c667d7655b2c
[INFO] documenting neverRare/butter against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FneverRare%2Fbutter" "/workspace/builds/worker-37/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-37/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/neverRare/butter on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/neverRare/butter
[INFO] finished tweaking git repo https://github.com/neverRare/butter
[INFO] tweaked toml for git repo https://github.com/neverRare/butter written to /workspace/builds/worker-37/source/Cargo.toml
[INFO] crate git repo https://github.com/neverRare/butter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 34f6042f71bc39793b9e874ab1fea4eb657fe8751add75d974814fd0f389953f
[INFO] running `Command { std: "docker" "start" "-a" "34f6042f71bc39793b9e874ab1fea4eb657fe8751add75d974814fd0f389953f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34f6042f71bc39793b9e874ab1fea4eb657fe8751add75d974814fd0f389953f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34f6042f71bc39793b9e874ab1fea4eb657fe8751add75d974814fd0f389953f", kill_on_drop: false }`
[INFO] [stdout] 34f6042f71bc39793b9e874ab1fea4eb657fe8751add75d974814fd0f389953f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4ef34f81b91d74195daa08bd1b11f2c6b6dff099a938708633aa1da441c0d86
[INFO] running `Command { std: "docker" "start" "-a" "d4ef34f81b91d74195daa08bd1b11f2c6b6dff099a938708633aa1da441c0d86", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.122
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling siphasher v0.3.10
[INFO] [stderr]    Compiling parking_lot_core v0.9.2
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking new_debug_unreachable v1.0.4
[INFO] [stderr]     Checking once_cell v1.10.0
[INFO] [stderr]     Checking precomputed-hash v0.1.1
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]     Checking bytes v1.1.0
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling heck v0.4.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking textwrap v0.15.0
[INFO] [stderr]     Checking strsim v0.10.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking termcolor v1.1.3
[INFO] [stderr]     Checking phf_shared v0.10.0
[INFO] [stderr]     Checking clap_lex v0.2.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling lock_api v0.4.7
[INFO] [stderr]    Compiling indexmap v1.8.1
[INFO] [stderr]     Checking combine v4.6.4
[INFO] [stderr]    Compiling quote v1.0.17
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.12.0
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling phf_generator v0.10.0
[INFO] [stderr]    Compiling string_cache_codegen v0.5.2
[INFO] [stderr]    Compiling hir v0.1.0 (/opt/rustwide/workdir/hir)
[INFO] [stderr]     Checking string_cache v0.8.4
[INFO] [stderr]  Documenting hir v0.1.0 (/opt/rustwide/workdir/hir)
[INFO] [stderr]     Checking type-system v0.1.0 (/opt/rustwide/workdir/type-system)
[INFO] [stderr]  Documenting type-system v0.1.0 (/opt/rustwide/workdir/type-system)
[INFO] [stdout] warning: unused variable: `statements`
[INFO] [stdout]   --> type-system/src/lib.rs:29:14
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub fn infer(statements: Vec<Statement<()>>) -> Result<Vec<Statement<Type>>, TypeError> {
[INFO] [stdout]    |              ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_statements`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:411:24
[INFO] [stdout]     |
[INFO] [stdout] 411 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_left1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:411:31
[INFO] [stdout]     |
[INFO] [stdout] 411 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right1`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:411:38
[INFO] [stdout]     |
[INFO] [stdout] 411 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                      ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `left2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:411:57
[INFO] [stdout]     |
[INFO] [stdout] 411 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                         ^^^^^ help: if this is intentional, prefix it with an underscore: `_left2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rest2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:411:64
[INFO] [stdout]     |
[INFO] [stdout] 411 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                                ^^^^^ help: if this is intentional, prefix it with an underscore: `_rest2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `right2`
[INFO] [stdout]    --> type-system/src/ty/cons.rs:411:71
[INFO] [stdout]     |
[INFO] [stdout] 411 |             (Self::Row(left1, rest1, right1), Self::Row(left2, rest2, right2)) => todo!(),
[INFO] [stdout]     |                                                                       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_right2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling clap_derive v3.1.18
[INFO] [stderr]     Checking parser v0.1.0 (/opt/rustwide/workdir/parser)
[INFO] [stderr]  Documenting parser v0.1.0 (/opt/rustwide/workdir/parser)
[INFO] [stderr]     Checking clap v3.1.18
[INFO] [stderr]  Documenting butter v0.1.0 (/opt/rustwide/workdir/cli)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.71s
[INFO] running `Command { std: "docker" "inspect" "d4ef34f81b91d74195daa08bd1b11f2c6b6dff099a938708633aa1da441c0d86", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4ef34f81b91d74195daa08bd1b11f2c6b6dff099a938708633aa1da441c0d86", kill_on_drop: false }`
[INFO] [stdout] d4ef34f81b91d74195daa08bd1b11f2c6b6dff099a938708633aa1da441c0d86
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-37/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=warn" "-e" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=1" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 0af2e3b028dbc770e86853d6ce40c3e74f5ddd25b8366bca453bee5b8b726a7e
[INFO] running `Command { std: "docker" "start" "-a" "0af2e3b028dbc770e86853d6ce40c3e74f5ddd25b8366bca453bee5b8b726a7e", kill_on_drop: false }`
[INFO] [stderr] error: manifest path `/opt/rustwide/workdir/Cargo.toml` is a virtual manifest, but this command requires running against an actual package in this workspace
[INFO] running `Command { std: "docker" "inspect" "0af2e3b028dbc770e86853d6ce40c3e74f5ddd25b8366bca453bee5b8b726a7e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0af2e3b028dbc770e86853d6ce40c3e74f5ddd25b8366bca453bee5b8b726a7e", kill_on_drop: false }`
[INFO] [stdout] 0af2e3b028dbc770e86853d6ce40c3e74f5ddd25b8366bca453bee5b8b726a7e