[INFO] fetching crate qcow 1.2.0...
[INFO] checking qcow-1.2.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate qcow 1.2.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate qcow 1.2.0 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 qcow 1.2.0
[INFO] finished tweaking crates.io crate qcow 1.2.0
[INFO] tweaked toml for crates.io crate qcow 1.2.0 written to /workspace/builds/worker-4-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 30 packages
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.58)
[INFO] [stderr]       Adding zstd v0.9.2+zstd.1.5.1 (latest: v0.13.1)
[INFO] [stderr]       Adding zstd-safe v4.1.3+zstd.1.5.1 (latest: v7.1.0)
[INFO] [stderr]       Adding zstd-sys v1.6.2+zstd.1.5.1 (latest: v2.0.10+zstd.1.5.6)
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 51ba3704b03694ef0452ba4efef8f35ee9210fff452c662f2de35dec5a4c4d42
[INFO] running `Command { std: "docker" "start" "-a" "51ba3704b03694ef0452ba4efef8f35ee9210fff452c662f2de35dec5a4c4d42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51ba3704b03694ef0452ba4efef8f35ee9210fff452c662f2de35dec5a4c4d42", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51ba3704b03694ef0452ba4efef8f35ee9210fff452c662f2de35dec5a4c4d42", kill_on_drop: false }`
[INFO] [stdout] 51ba3704b03694ef0452ba4efef8f35ee9210fff452c662f2de35dec5a4c4d42
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 1b4ec04210eccc52879e1942ef3ef6c7c9e77adcd2316737ad2fe15f6ab7d7c0
[INFO] running `Command { std: "docker" "start" "-a" "1b4ec04210eccc52879e1942ef3ef6c7c9e77adcd2316737ad2fe15f6ab7d7c0", kill_on_drop: false }`
[INFO] [stderr]    Compiling zstd-sys v1.6.2+zstd.1.5.1
[INFO] [stderr]    Compiling cmake v0.1.50
[INFO] [stderr]    Compiling zstd-safe v4.1.3+zstd.1.5.1
[INFO] [stderr]    Compiling either v1.10.0
[INFO] [stderr]    Compiling modular-bitfield-impl v0.11.2
[INFO] [stderr]    Compiling binread_derive v2.1.0
[INFO] [stderr]    Compiling libz-sys v1.1.16
[INFO] [stderr]     Checking modular-bitfield v0.11.2
[INFO] [stderr]     Checking binread v2.2.0
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking zstd v0.9.2+zstd.1.5.1
[INFO] [stderr]     Checking qcow v1.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `L1Entry` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::levels::{L1Entry, L2Entry};
[INFO] [stdout]   |                     ^^^^^^^
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `L1Entry` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `L2Entry` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::levels::{L1Entry, L2Entry};
[INFO] [stdout]   |                              ^^^^^^^
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `L2Entry` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `File` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 5 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufReader` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufReader` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 6 | use std::io::{self, BufReader, Read, Seek};
[INFO] [stdout]   |                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 6 | use std::io::{self, BufReader, Read, Seek};
[INFO] [stdout]   |                                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Seek` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `Seek` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 6 | use std::io::{self, BufReader, Read, Seek};
[INFO] [stdout]   |                                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `L1Entry` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:1:21
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::levels::{L1Entry, L2Entry};
[INFO] [stdout]   |                     ^^^^^^^
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `L1Entry` is already imported here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `L2Entry` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:1:30
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::levels::{L1Entry, L2Entry};
[INFO] [stdout]   |                              ^^^^^^^
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `L2Entry` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `File` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `File` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 5 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `BufReader` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:6:21
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `BufReader` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 6 | use std::io::{self, BufReader, Read, Seek};
[INFO] [stdout]   |                     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:6:32
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `Read` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 6 | use std::io::{self, BufReader, Read, Seek};
[INFO] [stdout]   |                                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Seek` is imported redundantly
[INFO] [stdout]  --> src/reader.rs:6:38
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::*;
[INFO] [stdout]   |     -------- the item `Seek` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 6 | use std::io::{self, BufReader, Read, Seek};
[INFO] [stdout]   |                                      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.49s
[INFO] running `Command { std: "docker" "inspect" "1b4ec04210eccc52879e1942ef3ef6c7c9e77adcd2316737ad2fe15f6ab7d7c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b4ec04210eccc52879e1942ef3ef6c7c9e77adcd2316737ad2fe15f6ab7d7c0", kill_on_drop: false }`
[INFO] [stdout] 1b4ec04210eccc52879e1942ef3ef6c7c9e77adcd2316737ad2fe15f6ab7d7c0