[INFO] fetching crate structconf 0.4.0...
[INFO] checking structconf-0.4.0 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate structconf 0.4.0 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate structconf 0.4.0 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate structconf 0.4.0
[INFO] finished tweaking crates.io crate structconf 0.4.0
[INFO] tweaked toml for crates.io crate structconf 0.4.0 written to /workspace/builds/worker-21/source/Cargo.toml
[INFO] crate crates.io crate structconf 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4a8dee31c6b880a402b4ddece0d0c4e378a1aedd41123f96c5b1a88ce1f1c3ff
[INFO] running `Command { std: "docker" "start" "-a" "4a8dee31c6b880a402b4ddece0d0c4e378a1aedd41123f96c5b1a88ce1f1c3ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4a8dee31c6b880a402b4ddece0d0c4e378a1aedd41123f96c5b1a88ce1f1c3ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a8dee31c6b880a402b4ddece0d0c4e378a1aedd41123f96c5b1a88ce1f1c3ff", kill_on_drop: false }`
[INFO] [stdout] 4a8dee31c6b880a402b4ddece0d0c4e378a1aedd41123f96c5b1a88ce1f1c3ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf5cd584978fefd8ea8ba445bd33994bb94dcd61c3600ddda943cbd11bc0fca9
[INFO] running `Command { std: "docker" "start" "-a" "cf5cd584978fefd8ea8ba445bd33994bb94dcd61c3600ddda943cbd11bc0fca9", 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.21
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.41
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.9
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]     Checking ahash v0.3.8
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling serde_json v1.0.57
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking dissimilar v1.0.2
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking termcolor v1.1.0
[INFO] [stderr]     Checking strum v0.19.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking dirs v3.0.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking dlv-list v0.2.2
[INFO] [stderr]     Checking ordered-multimap v0.2.4
[INFO] [stderr]     Checking rust-ini v0.15.3
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling strum_macros v0.19.2
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling structconf_derive v0.4.0
[INFO] [stderr]     Checking thiserror v1.0.20
[INFO] [stderr]     Checking structconf v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking trybuild v1.0.34
[INFO] [stdout] warning: field is never read: `args_opt`
[INFO] [stdout]   --> examples/showcase.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     pub args_opt: u8,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ignored`
[INFO] [stdout]   --> examples/showcase.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     pub ignored: bool,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `conf_file`
[INFO] [stdout]   --> examples/vidify.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 |     conf_file: Option<String>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[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 [unoptimized + debuginfo] target(s) in 27.81s
[INFO] running `Command { std: "docker" "inspect" "cf5cd584978fefd8ea8ba445bd33994bb94dcd61c3600ddda943cbd11bc0fca9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf5cd584978fefd8ea8ba445bd33994bb94dcd61c3600ddda943cbd11bc0fca9", kill_on_drop: false }`
[INFO] [stdout] cf5cd584978fefd8ea8ba445bd33994bb94dcd61c3600ddda943cbd11bc0fca9