[INFO] cloning repository https://github.com/davidrhodus/packet-delay-variation-measurement
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/davidrhodus/packet-delay-variation-measurement" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidrhodus%2Fpacket-delay-variation-measurement", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidrhodus%2Fpacket-delay-variation-measurement'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c9637c5469695e8c179fe162f74589a744bd6111
[INFO] checking davidrhodus/packet-delay-variation-measurement against master#642c19bfc3a5c1de985bf5d0cc8207ac9d22708a for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdavidrhodus%2Fpacket-delay-variation-measurement" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/davidrhodus/packet-delay-variation-measurement
[INFO] finished tweaking git repo https://github.com/davidrhodus/packet-delay-variation-measurement
[INFO] tweaked toml for git repo https://github.com/davidrhodus/packet-delay-variation-measurement written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/davidrhodus/packet-delay-variation-measurement on toolchain 642c19bfc3a5c1de985bf5d0cc8207ac9d22708a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/davidrhodus/packet-delay-variation-measurement 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" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ntp v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c674958adc210e5bf7a3fda268e8ef928d8fbe90c99a9e7bcb7f9c124f8d0be5
[INFO] running `Command { std: "docker" "start" "-a" "c674958adc210e5bf7a3fda268e8ef928d8fbe90c99a9e7bcb7f9c124f8d0be5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c674958adc210e5bf7a3fda268e8ef928d8fbe90c99a9e7bcb7f9c124f8d0be5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c674958adc210e5bf7a3fda268e8ef928d8fbe90c99a9e7bcb7f9c124f8d0be5", kill_on_drop: false }`
[INFO] [stdout] c674958adc210e5bf7a3fda268e8ef928d8fbe90c99a9e7bcb7f9c124f8d0be5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+642c19bfc3a5c1de985bf5d0cc8207ac9d22708a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e35122a22f39fde319310857b4ad5c3b24e85d09941a6c6ae694e8dd071b36ff
[INFO] running `Command { std: "docker" "start" "-a" "e35122a22f39fde319310857b4ad5c3b24e85d09941a6c6ae694e8dd071b36ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.161
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking conv v0.3.3
[INFO] [stderr]     Checking time v0.1.45
[INFO] [stderr]     Checking ntp v0.5.0
[INFO] [stderr]     Checking PDV2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `last_arrival_time` is assigned to, but never used
[INFO] [stdout]   --> src/bin/server.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut last_arrival_time: Option<SystemTime> = None;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_last_arrival_time` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last_arrival_time` is never read
[INFO] [stdout]   --> src/bin/server.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         last_arrival_time = Some(SystemTime::now());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `SystemTime` and `UNIX_EPOCH`
[INFO] [stdout]  --> src/bin/client.rs:3:27
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::time::{Duration, SystemTime, UNIX_EPOCH};
[INFO] [stdout]   |                           ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.52s
[INFO] [stdout] warning: unused imports: `SystemTime` and `UNIX_EPOCH`
[INFO] [stdout]  --> src/bin/client.rs:3:27
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::time::{Duration, SystemTime, UNIX_EPOCH};
[INFO] [stdout]   |                           ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `last_arrival_time` is assigned to, but never used
[INFO] [stdout]   --> src/bin/server.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let mut last_arrival_time: Option<SystemTime> = None;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_last_arrival_time` instead
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last_arrival_time` is never read
[INFO] [stdout]   --> src/bin/server.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |         last_arrival_time = Some(SystemTime::now());
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e35122a22f39fde319310857b4ad5c3b24e85d09941a6c6ae694e8dd071b36ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e35122a22f39fde319310857b4ad5c3b24e85d09941a6c6ae694e8dd071b36ff", kill_on_drop: false }`
[INFO] [stdout] e35122a22f39fde319310857b4ad5c3b24e85d09941a6c6ae694e8dd071b36ff