[INFO] fetching crate du2 0.2.1...
[INFO] checking du2-0.2.1 against master#9610dfe5a9a731ced1ea4923ecbd0c57fe367898 for beta-170-4
[INFO] extracting crate du2 0.2.1 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate du2 0.2.1 on toolchain 9610dfe5a9a731ced1ea4923ecbd0c57fe367898
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate du2 0.2.1
[INFO] finished tweaking crates.io crate du2 0.2.1
[INFO] tweaked toml for crates.io crate du2 0.2.1 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate du2 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" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded users v0.10.0
[INFO] [stderr]   Downloaded num-format v0.4.0
[INFO] [stderr]   Downloaded serde v1.0.114
[INFO] [stderr]   Downloaded hermit-abi v0.1.14
[INFO] [stderr]   Downloaded structopt v0.3.15
[INFO] [stderr]   Downloaded anyhow v1.0.31
[INFO] [stderr]   Downloaded arrayvec v0.4.12
[INFO] [stderr]   Downloaded proc-macro-error-attr v1.0.3
[INFO] [stderr]   Downloaded cpu-time v1.0.0
[INFO] [stderr]   Downloaded structopt-derive v0.4.8
[INFO] [stderr]   Downloaded proc-macro-error v1.0.3
[INFO] [stderr]   Downloaded regex v1.3.9
[INFO] [stderr]   Downloaded bstr v0.2.13
[INFO] [stderr]   Downloaded regex-syntax v0.6.18
[INFO] [stderr]   Downloaded syn v1.0.33
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 982bce63744f56da8931a0afbd4e4b898292222955ace2568a9e9ff4b65277ab
[INFO] running `Command { std: "docker" "start" "-a" "982bce63744f56da8931a0afbd4e4b898292222955ace2568a9e9ff4b65277ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "982bce63744f56da8931a0afbd4e4b898292222955ace2568a9e9ff4b65277ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "982bce63744f56da8931a0afbd4e4b898292222955ace2568a9e9ff4b65277ab", kill_on_drop: false }`
[INFO] [stdout] 982bce63744f56da8931a0afbd4e4b898292222955ace2568a9e9ff4b65277ab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:19e73879b68f455e41552ea35293514db52ea292d993f571636dbffedb77a1ee" "/opt/rustwide/cargo-home/bin/cargo" "+9610dfe5a9a731ced1ea4923ecbd0c57fe367898" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8b5482fa3858d287af583b732bbbd3fdcd2a9c508bbb38044a98bb3ac3b9d11
[INFO] running `Command { std: "docker" "start" "-a" "f8b5482fa3858d287af583b732bbbd3fdcd2a9c508bbb38044a98bb3ac3b9d11", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.3
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.3
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking regex-syntax v0.6.18
[INFO] [stderr]     Checking clap v2.33.1
[INFO] [stderr]     Checking users v0.10.0
[INFO] [stderr]     Checking cpu-time v1.0.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking num-format v0.4.0
[INFO] [stderr]     Checking aho-corasick v0.7.6
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking regex v1.3.9
[INFO] [stderr]     Checking bstr v0.2.13
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]    Compiling structopt-derive v0.4.8
[INFO] [stderr]     Checking structopt v0.3.15
[INFO] [stderr]     Checking du2 v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:348:21
[INFO] [stdout]     |
[INFO] [stdout] 348 |                 let mut dstats: &mut DirStats = if top.dtree.contains_key(parent) {
[INFO] [stdout]     |                     ----^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:404:25
[INFO] [stdout]     |
[INFO] [stdout] 404 |                     let mut upstats = if top.dtree.contains_key(nextpar) {
[INFO] [stdout]     |                         ----^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:348:21
[INFO] [stdout]     |
[INFO] [stdout] 348 |                 let mut dstats: &mut DirStats = if top.dtree.contains_key(parent) {
[INFO] [stdout]     |                     ----^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:404:25
[INFO] [stdout]     |
[INFO] [stdout] 404 |                     let mut upstats = if top.dtree.contains_key(nextpar) {
[INFO] [stdout]     |                         ----^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `size` and `uid` are never read
[INFO] [stdout]    --> src/main.rs:295:5
[INFO] [stdout]     |
[INFO] [stdout] 294 | struct UserUsage {
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 295 |     size: u64,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 296 |     uid: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `UserUsage` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `size` and `uid` are never read
[INFO] [stdout]    --> src/main.rs:295:5
[INFO] [stdout]     |
[INFO] [stdout] 294 | struct UserUsage {
[INFO] [stdout]     |        --------- fields in this struct
[INFO] [stdout] 295 |     size: u64,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 296 |     uid: u32,
[INFO] [stdout]     |     ^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `UserUsage` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.29s
[INFO] running `Command { std: "docker" "inspect" "f8b5482fa3858d287af583b732bbbd3fdcd2a9c508bbb38044a98bb3ac3b9d11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8b5482fa3858d287af583b732bbbd3fdcd2a9c508bbb38044a98bb3ac3b9d11", kill_on_drop: false }`
[INFO] [stdout] f8b5482fa3858d287af583b732bbbd3fdcd2a9c508bbb38044a98bb3ac3b9d11
