[INFO] fetching crate project_io 0.1.0...
[INFO] checking project_io-0.1.0 against master#bbe853615821442ef11d6cd42a30a73432b38d89 for pr-154205
[INFO] extracting crate project_io 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate project_io 0.1.0
[INFO] finished tweaking crates.io crate project_io 0.1.0
[INFO] tweaked toml for crates.io crate project_io 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate project_io 0.1.0 on toolchain bbe853615821442ef11d6cd42a30a73432b38d89
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate project_io 0.1.0 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" "+bbe853615821442ef11d6cd42a30a73432b38d89" "fetch" "--manifest-path" "Cargo.toml", 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] 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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6e632d24797797ab15f3c8329412a4abb66f7cb8e82493f7b64c22e28b5e3633
[INFO] running `Command { std: "docker" "start" "-a" "6e632d24797797ab15f3c8329412a4abb66f7cb8e82493f7b64c22e28b5e3633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6e632d24797797ab15f3c8329412a4abb66f7cb8e82493f7b64c22e28b5e3633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e632d24797797ab15f3c8329412a4abb66f7cb8e82493f7b64c22e28b5e3633", kill_on_drop: false }`
[INFO] [stdout] 6e632d24797797ab15f3c8329412a4abb66f7cb8e82493f7b64c22e28b5e3633
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d84958b7f3f098504f01fd4fa53e5afedbff75b2e1a27aab7486c3b873dda8e9
[INFO] running `Command { std: "docker" "start" "-a" "d84958b7f3f098504f01fd4fa53e5afedbff75b2e1a27aab7486c3b873dda8e9", kill_on_drop: false }`
[INFO] [stderr]     Checking project_io v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ProjectIoError`
[INFO] [stdout]  --> src/serializer.rs:1:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::error::{ProjectIoError, ProjectResult};
[INFO] [stdout]   |                    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `flags`
[INFO] [stdout]  --> src/serializer.rs:2:31
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::format::{fnv1a_64, flags, FileHeader};
[INFO] [stdout]   |                               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/deserializer.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/autosave.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ProjectIoError`
[INFO] [stdout]  --> src/serializer.rs:1:20
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::error::{ProjectIoError, ProjectResult};
[INFO] [stdout]   |                    ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `flags`
[INFO] [stdout]  --> src/serializer.rs:2:31
[INFO] [stdout]   |
[INFO] [stdout] 2 | use crate::format::{fnv1a_64, flags, FileHeader};
[INFO] [stdout]   |                               ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/deserializer.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Path`
[INFO] [stdout]  --> src/autosave.rs:4:17
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::path::{Path, PathBuf};
[INFO] [stdout]   |                 ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]   --> src/serializer.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let indent = if self.minify { "" } else { "  " };
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `pos` is never read
[INFO] [stdout]   --> src/deserializer.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 90 | struct JsonParser<'a> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 91 |     src: &'a str,
[INFO] [stdout] 92 |     pos: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indent`
[INFO] [stdout]   --> src/serializer.rs:89:13
[INFO] [stdout]    |
[INFO] [stdout] 89 |         let indent = if self.minify { "" } else { "  " };
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_indent`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `pos` is never read
[INFO] [stdout]   --> src/deserializer.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 90 | struct JsonParser<'a> {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 91 |     src: &'a str,
[INFO] [stdout] 92 |     pos: usize,
[INFO] [stdout]    |     ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `Command { std: "docker" "inspect" "d84958b7f3f098504f01fd4fa53e5afedbff75b2e1a27aab7486c3b873dda8e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d84958b7f3f098504f01fd4fa53e5afedbff75b2e1a27aab7486c3b873dda8e9", kill_on_drop: false }`
[INFO] [stdout] d84958b7f3f098504f01fd4fa53e5afedbff75b2e1a27aab7486c3b873dda8e9