[INFO] cloning repository https://github.com/tengwar/file-dedup
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tengwar/file-dedup" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftengwar%2Ffile-dedup", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftengwar%2Ffile-dedup'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e0090ab52e14d029e009cae52bfde07bb3074874
[INFO] checking tengwar/file-dedup against try#b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b for pr-82781
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftengwar%2Ffile-dedup" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/tengwar/file-dedup on toolchain b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/tengwar/file-dedup
[INFO] finished tweaking git repo https://github.com/tengwar/file-dedup
[INFO] tweaked toml for git repo https://github.com/tengwar/file-dedup written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/tengwar/file-dedup already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gcc v0.3.50
[INFO] [stderr]   Downloaded libc v0.2.23
[INFO] [stderr]   Downloaded clap v2.24.2
[INFO] [stderr]   Downloaded backtrace-sys v0.1.11
[INFO] [stderr]   Downloaded backtrace v0.3.2
[INFO] [stderr]   Downloaded multimap v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 92ffcb39b33f60685301620dea7c7cd69b4384a22135863d18191f147eb51f3a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "92ffcb39b33f60685301620dea7c7cd69b4384a22135863d18191f147eb51f3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92ffcb39b33f60685301620dea7c7cd69b4384a22135863d18191f147eb51f3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92ffcb39b33f60685301620dea7c7cd69b4384a22135863d18191f147eb51f3a", kill_on_drop: false }`
[INFO] [stdout] 92ffcb39b33f60685301620dea7c7cd69b4384a22135863d18191f147eb51f3a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "rustops/crates-build-env@sha256:4f92631de1aa59f8320307485d3b3c869a5c90ab1d76ce2cffab9807b8c9a1fb" "/opt/rustwide/cargo-home/bin/cargo" "+b09a3e9a7a0ff7efb269ec0c13dcc0fd3cedcf6b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b47d5e56faf9b23af9cd85467b8ea0577e4fa638add489bc65f1adf99e7f32c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7b47d5e56faf9b23af9cd85467b8ea0577e4fa638add489bc65f1adf99e7f32c", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.23
[INFO] [stderr]    Compiling gcc v0.3.50
[INFO] [stderr]     Checking rustc-demangle v0.1.4
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking bitflags v0.8.2
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking unicode-segmentation v1.2.0
[INFO] [stderr]     Checking strsim v0.6.0
[INFO] [stderr]     Checking ansi_term v0.9.0
[INFO] [stderr]     Checking multimap v0.3.0
[INFO] [stderr]     Checking term_size v0.3.0
[INFO] [stderr]     Checking atty v0.2.2
[INFO] [stderr]     Checking clap v2.24.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.11
[INFO] [stderr]     Checking backtrace v0.3.2
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking image-dedup v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/helper.rs:8:45
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn visit_dirs(dir: &Path, command: &mut FnMut(&DirEntry) -> Result<()>) -> Result<()> {
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&DirEntry) -> Result<()>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/helper.rs:8:45
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn visit_dirs(dir: &Path, command: &mut FnMut(&DirEntry) -> Result<()>) -> Result<()> {
[INFO] [stdout]   |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn FnMut(&DirEntry) -> Result<()>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:93:8
[INFO] [stdout]    |
[INFO] [stdout] 93 |             let mut some_dupes = &mut helper::find_duplicates(paths) // TODO: use human-readable sizes below.
[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:93:8
[INFO] [stdout]    |
[INFO] [stdout] 93 |             let mut some_dupes = &mut helper::find_duplicates(paths) // TODO: use human-readable sizes below.
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.56s
[INFO] running `Command { std: "docker" "inspect" "7b47d5e56faf9b23af9cd85467b8ea0577e4fa638add489bc65f1adf99e7f32c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b47d5e56faf9b23af9cd85467b8ea0577e4fa638add489bc65f1adf99e7f32c", kill_on_drop: false }`
[INFO] [stdout] 7b47d5e56faf9b23af9cd85467b8ea0577e4fa638add489bc65f1adf99e7f32c