[INFO] fetching crate persist 1.0.0...
[INFO] checking persist-1.0.0 against try#b28cc4eb48a6415b914e8ad0308be255ff8d73ed for pr-156508-1
[INFO] extracting crate persist 1.0.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate persist 1.0.0
[INFO] finished tweaking crates.io crate persist 1.0.0
[INFO] tweaked toml for crates.io crate persist 1.0.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate persist 1.0.0 on toolchain b28cc4eb48a6415b914e8ad0308be255ff8d73ed
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate persist 1.0.0 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" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 42adf08f4270a5b957d46e530cd1e52a3a84fe91e177361c5f79cc4cec58c6b0
[INFO] running `Command { std: "docker" "start" "-a" "42adf08f4270a5b957d46e530cd1e52a3a84fe91e177361c5f79cc4cec58c6b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "42adf08f4270a5b957d46e530cd1e52a3a84fe91e177361c5f79cc4cec58c6b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42adf08f4270a5b957d46e530cd1e52a3a84fe91e177361c5f79cc4cec58c6b0", kill_on_drop: false }`
[INFO] [stdout] 42adf08f4270a5b957d46e530cd1e52a3a84fe91e177361c5f79cc4cec58c6b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+b28cc4eb48a6415b914e8ad0308be255ff8d73ed" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 252756215d40c3ed55cf28e4b5c5ae962b62f86738fa2d93444666321e8e7dd2
[INFO] running `Command { std: "docker" "start" "-a" "252756215d40c3ed55cf28e4b5c5ae962b62f86738fa2d93444666321e8e7dd2", kill_on_drop: false }`
[INFO] [stderr]     Checking persist v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate::value::Value`
[INFO] [stdout]  --> src/convert.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::value::Value;
[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: `crate::value::Value`
[INFO] [stdout]  --> src/convert.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use crate::value::Value;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `DATA_SENTINEL` is never used
[INFO] [stdout]   --> src/convert.rs:15:18
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub(crate) const DATA_SENTINEL: &str = "$persist:data";
[INFO] [stdout]    |                  ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hex_encode` is never used
[INFO] [stdout]   --> src/convert.rs:17:15
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub(crate) fn hex_encode(bytes: &[u8]) -> String {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `hex_decode` is never used
[INFO] [stdout]   --> src/convert.rs:25:15
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub(crate) fn hex_decode(s: &str) -> Option<Vec<u8>> {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `DATA_SENTINEL` is never used
[INFO] [stdout]   --> src/convert.rs:15:18
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub(crate) const DATA_SENTINEL: &str = "$persist:data";
[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 0.66s
[INFO] running `Command { std: "docker" "inspect" "252756215d40c3ed55cf28e4b5c5ae962b62f86738fa2d93444666321e8e7dd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "252756215d40c3ed55cf28e4b5c5ae962b62f86738fa2d93444666321e8e7dd2", kill_on_drop: false }`
[INFO] [stdout] 252756215d40c3ed55cf28e4b5c5ae962b62f86738fa2d93444666321e8e7dd2