[INFO] cloning repository https://github.com/fw6/rust_in_action
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fw6/rust_in_action" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffw6%2Frust_in_action", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffw6%2Frust_in_action'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 596882862d9a43a2f6e232da9779fee765b27240
[INFO] checking fw6/rust_in_action against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffw6%2Frust_in_action" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fw6/rust_in_action on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fw6/rust_in_action
[INFO] finished tweaking git repo https://github.com/fw6/rust_in_action
[INFO] tweaked toml for git repo https://github.com/fw6/rust_in_action written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fw6/rust_in_action already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap_derive v3.2.17
[INFO] [stderr]   Downloaded clap v3.2.17
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c07f9c68f69a1777db7ee0d7d42d70fd385e2300c688e54dc4e964356ffefbe0
[INFO] running `Command { std: "docker" "start" "-a" "c07f9c68f69a1777db7ee0d7d42d70fd385e2300c688e54dc4e964356ffefbe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c07f9c68f69a1777db7ee0d7d42d70fd385e2300c688e54dc4e964356ffefbe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c07f9c68f69a1777db7ee0d7d42d70fd385e2300c688e54dc4e964356ffefbe0", kill_on_drop: false }`
[INFO] [stdout] c07f9c68f69a1777db7ee0d7d42d70fd385e2300c688e54dc4e964356ffefbe0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec9f68a6a295dfff7a8e84999aedcf091120e6e8684d0bf8d24126f2cb21392d
[INFO] running `Command { std: "docker" "start" "-a" "ec9f68a6a295dfff7a8e84999aedcf091120e6e8684d0bf8d24126f2cb21392d", kill_on_drop: false }`
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr] note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr] note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr] note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.132
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling proc-macro2 v1.0.43
[INFO] [stderr]    Compiling unicode-ident v1.0.3
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling num-iter v0.1.43
[INFO] [stderr]     Checking os_str_bytes v6.3.0
[INFO] [stderr]     Checking indexmap v1.9.1
[INFO] [stderr]     Checking cube_sat v0.1.0 (/opt/rustwide/workdir/cube_sat)
[INFO] [stderr]     Checking parse_log v0.1.0 (/opt/rustwide/workdir/parse_log)
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> cube_sat/src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Message {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 16 |     to: u64,
[INFO] [stdout] 17 |     content: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `StatusMessage` is never used
[INFO] [stdout]   --> cube_sat/src/main.rs:47:6
[INFO] [stdout]    |
[INFO] [stdout] 47 | enum StatusMessage {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> cube_sat/src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | struct Message {
[INFO] [stdout]    |        ------- field in this struct
[INFO] [stdout] 16 |     to: u64,
[INFO] [stdout] 17 |     content: String,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Message` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `StatusMessage` is never used
[INFO] [stdout]   --> cube_sat/src/main.rs:47:6
[INFO] [stdout]    |
[INFO] [stdout] 47 | enum StatusMessage {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Suit` is never used
[INFO] [stdout]   --> parse_log/src/main.rs:39:6
[INFO] [stdout]    |
[INFO] [stdout] 39 | enum Suit {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Card` is never used
[INFO] [stdout]   --> parse_log/src/main.rs:46:6
[INFO] [stdout]    |
[INFO] [stdout] 46 | enum Card {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Suit` is never used
[INFO] [stdout]   --> parse_log/src/main.rs:39:6
[INFO] [stdout]    |
[INFO] [stdout] 39 | enum Suit {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Card` is never used
[INFO] [stdout]   --> parse_log/src/main.rs:46:6
[INFO] [stdout]    |
[INFO] [stdout] 46 | enum Card {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking clap_lex v0.2.4
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking num-integer v0.1.45
[INFO] [stderr]     Checking num-complex v0.4.2
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking composite_data_types v0.1.0 (/opt/rustwide/workdir/composite_data_types)
[INFO] [stderr]     Checking globalerror v0.1.0 (/opt/rustwide/workdir/globalerror)
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir/mandelbrot)
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.2.17
[INFO] [stderr]     Checking clap v3.2.17
[INFO] [stderr]     Checking grep_lite v0.1.0 (/opt/rustwide/workdir/grep_lite)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.10s
[INFO] running `Command { std: "docker" "inspect" "ec9f68a6a295dfff7a8e84999aedcf091120e6e8684d0bf8d24126f2cb21392d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec9f68a6a295dfff7a8e84999aedcf091120e6e8684d0bf8d24126f2cb21392d", kill_on_drop: false }`
[INFO] [stdout] ec9f68a6a295dfff7a8e84999aedcf091120e6e8684d0bf8d24126f2cb21392d