[INFO] fetching crate ftrace 0.2.1...
[INFO] checking ftrace-0.2.1 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate ftrace 0.2.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate ftrace 0.2.1 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 crates.io crate ftrace 0.2.1
[INFO] finished tweaking crates.io crate ftrace 0.2.1
[INFO] tweaked toml for crates.io crate ftrace 0.2.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] crate crates.io crate ftrace 0.2.1 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]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded easy_collections v0.3.2
[INFO] [stderr]   Downloaded which v4.2.2
[INFO] [stderr]   Downloaded clap v3.0.0
[INFO] [stderr]   Downloaded clap_derive v3.0.0
[INFO] [stderr]   Downloaded yansi v0.5.0
[INFO] [stderr]   Downloaded syn v1.0.84
[INFO] [stderr]   Downloaded flexi_logger v0.17.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 50e551e97d8887e6dac72fbb5978de898e6a80b4d98c8e5a9bd80ca77aba9cd8
[INFO] running `Command { std: "docker" "start" "-a" "50e551e97d8887e6dac72fbb5978de898e6a80b4d98c8e5a9bd80ca77aba9cd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50e551e97d8887e6dac72fbb5978de898e6a80b4d98c8e5a9bd80ca77aba9cd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50e551e97d8887e6dac72fbb5978de898e6a80b4d98c8e5a9bd80ca77aba9cd8", kill_on_drop: false }`
[INFO] [stdout] 50e551e97d8887e6dac72fbb5978de898e6a80b4d98c8e5a9bd80ca77aba9cd8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 2d4f436f8e4fa796ae30cb133ca740e11a6405f869a776c64bc9e6d03bfa507e
[INFO] running `Command { std: "docker" "start" "-a" "2d4f436f8e4fa796ae30cb133ca740e11a6405f869a776c64bc9e6d03bfa507e", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.84
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling anyhow v1.0.52
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking os_str_bytes v6.0.0
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]    Compiling paste v1.0.6
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking textwrap v0.14.2
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]    Compiling pest_meta v2.1.3
[INFO] [stderr]     Checking which v4.2.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking easy_collections v0.3.2
[INFO] [stderr]    Compiling pest_generator v2.1.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling clap_derive v3.0.0
[INFO] [stderr]    Compiling pest_derive v2.1.0
[INFO] [stderr]     Checking thiserror v1.0.30
[INFO] [stderr]     Checking flexi_logger v0.17.1
[INFO] [stderr]     Checking clap v3.0.0
[INFO] [stderr]     Checking ftrace v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `mode` is never read
[INFO] [stdout]    --> src/analysis.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub struct FnInfo {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] 106 |     pub mode: AccessMode,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `FnInfo` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `mode` is never read
[INFO] [stdout]    --> src/analysis.rs:106:9
[INFO] [stdout]     |
[INFO] [stdout] 105 | pub struct FnInfo {
[INFO] [stdout]     |            ------ field in this struct
[INFO] [stdout] 106 |     pub mode: AccessMode,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `FnInfo` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.36s
[INFO] running `Command { std: "docker" "inspect" "2d4f436f8e4fa796ae30cb133ca740e11a6405f869a776c64bc9e6d03bfa507e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d4f436f8e4fa796ae30cb133ca740e11a6405f869a776c64bc9e6d03bfa507e", kill_on_drop: false }`
[INFO] [stdout] 2d4f436f8e4fa796ae30cb133ca740e11a6405f869a776c64bc9e6d03bfa507e