[INFO] fetching crate ghostfat 0.5.0...
[INFO] checking ghostfat-0.5.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate ghostfat 0.5.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate ghostfat 0.5.0 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 ghostfat 0.5.0
[INFO] finished tweaking crates.io crate ghostfat 0.5.0
[INFO] tweaked toml for crates.io crate ghostfat 0.5.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 76 packages
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding embedded-hal v0.2.7 (latest: v1.0.0)
[INFO] [stderr]       Adding nb v0.1.3 (latest: v1.1.0)
[INFO] [stderr]       Adding packing v0.1.0 (latest: v0.2.0)
[INFO] [stderr]       Adding simplelog v0.11.2 (latest: v0.12.2)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding termcolor v1.1.3 (latest: v1.4.1)
[INFO] [stderr]       Adding usb-device v0.2.9 (latest: v0.3.2)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding windows-core v0.52.0 (latest: v0.55.0)
[INFO] [stderr]       Adding yansi v0.5.1 (latest: v1.0.1)
[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]  Downloading crates ...
[INFO] [stderr]   Downloaded bitmask v0.5.0
[INFO] [stderr]   Downloaded usbd_mass_storage v0.1.0
[INFO] [stderr]   Downloaded usbd_bulk_only_transport v0.1.0
[INFO] [stderr]   Downloaded usbd_scsi v0.1.0
[INFO] [stderr]   Downloaded uf2_block v0.1.0
[INFO] [stderr]   Downloaded packing v0.1.0
[INFO] [stderr]   Downloaded fatfs v0.3.6
[INFO] [stderr]   Downloaded itm_logger v0.1.2
[INFO] [stderr]   Downloaded packing_codegen v0.1.0
[INFO] [stderr]   Downloaded simplelog v0.11.2
[INFO] [stderr]   Downloaded packing v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 0b63f6749a3a3daf6be1a4c8643dc525aded784ebeecb7233745d39c1d133636
[INFO] running `Command { std: "docker" "start" "-a" "0b63f6749a3a3daf6be1a4c8643dc525aded784ebeecb7233745d39c1d133636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0b63f6749a3a3daf6be1a4c8643dc525aded784ebeecb7233745d39c1d133636", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b63f6749a3a3daf6be1a4c8643dc525aded784ebeecb7233745d39c1d133636", kill_on_drop: false }`
[INFO] [stdout] 0b63f6749a3a3daf6be1a4c8643dc525aded784ebeecb7233745d39c1d133636
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 367efb7712926dc8c2a34cebff74a9d5fae5590a3561fb8a33bd758954c51ca0
[INFO] running `Command { std: "docker" "start" "-a" "367efb7712926dc8c2a34cebff74a9d5fae5590a3561fb8a33bd758954c51ca0", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking itm_logger v0.1.2
[INFO] [stderr]     Checking usb-device v0.2.9
[INFO] [stderr]     Checking bitmask v0.5.0
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking simplelog v0.11.2
[INFO] [stderr]     Checking pretty_assertions v1.4.0
[INFO] [stderr]     Checking fatfs v0.3.6
[INFO] [stderr]    Compiling packing_codegen v0.1.0
[INFO] [stderr]     Checking packing v0.1.0
[INFO] [stderr]     Checking packing v0.2.0
[INFO] [stderr]     Checking usbd_mass_storage v0.1.0
[INFO] [stderr]     Checking uf2_block v0.1.0
[INFO] [stderr]     Checking usbd_bulk_only_transport v0.1.0
[INFO] [stderr]     Checking usbd_scsi v0.1.0
[INFO] [stderr]     Checking ghostfat v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `info`
[INFO] [stdout]   --> src/lib.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 | use log::{debug, info, trace, warn, error};
[INFO] [stdout]    |                  ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `info`
[INFO] [stdout]   --> src/lib.rs:12:18
[INFO] [stdout]    |
[INFO] [stdout] 12 | use log::{debug, info, trace, warn, error};
[INFO] [stdout]    |                  ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]   --> src/config.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         index += 8;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]   --> src/config.rs:85:9
[INFO] [stdout]    |
[INFO] [stdout] 85 |         index += 8;
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`
[INFO] [stdout]  --> tests/integration.rs:2:17
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `debug`, `info`
[INFO] [stdout]  --> tests/integration.rs:3:18
[INFO] [stdout]   |
[INFO] [stdout] 3 | use log::{trace, debug, info};
[INFO] [stdout]   |                  ^^^^^  ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `SimpleLogger`
[INFO] [stdout]  --> tests/integration.rs:5:17
[INFO] [stdout]   |
[INFO] [stdout] 5 | use simplelog::{SimpleLogger, LevelFilter, Config as LogConfig};
[INFO] [stdout]   |                 ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]    --> tests/integration.rs:110:27
[INFO] [stdout]     |
[INFO] [stdout] 110 |             SeekFrom::End(v) => {
[INFO] [stdout]     |                           ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/integration.rs:221:5
[INFO] [stdout]     |
[INFO] [stdout] 221 |     f0.rewind();
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 221 |     let _ = f0.rewind();
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> tests/integration.rs:223:5
[INFO] [stdout]     |
[INFO] [stdout] 223 |     f0.flush();
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 223 |     let _ = f0.flush();
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.90s
[INFO] running `Command { std: "docker" "inspect" "367efb7712926dc8c2a34cebff74a9d5fae5590a3561fb8a33bd758954c51ca0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "367efb7712926dc8c2a34cebff74a9d5fae5590a3561fb8a33bd758954c51ca0", kill_on_drop: false }`
[INFO] [stdout] 367efb7712926dc8c2a34cebff74a9d5fae5590a3561fb8a33bd758954c51ca0