[INFO] fetching crate pickleback 0.1.0...
[INFO] checking pickleback-0.1.0 against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] extracting crate pickleback 0.1.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate pickleback 0.1.0
[INFO] finished tweaking crates.io crate pickleback 0.1.0
[INFO] tweaked toml for crates.io crate pickleback 0.1.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate pickleback 0.1.0 on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 55 packages to latest compatible versions
[INFO] [stderr]       Adding env_logger v0.10.2 (available: v0.11.8)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smallmap v1.4.2
[INFO] [stderr]   Downloaded lifeguard v0.6.1
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a4e935e72b2c91610e0aab2cbd9643f2bbbd1986789c1b3a284f55aec370eaf
[INFO] running `Command { std: "docker" "start" "-a" "2a4e935e72b2c91610e0aab2cbd9643f2bbbd1986789c1b3a284f55aec370eaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a4e935e72b2c91610e0aab2cbd9643f2bbbd1986789c1b3a284f55aec370eaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a4e935e72b2c91610e0aab2cbd9643f2bbbd1986789c1b3a284f55aec370eaf", kill_on_drop: false }`
[INFO] [stdout] 2a4e935e72b2c91610e0aab2cbd9643f2bbbd1986789c1b3a284f55aec370eaf
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e237927e886414d43b9b3c48f5457efbbc14b5e18323f1704947a4f2bec1fc2d
[INFO] running `Command { std: "docker" "start" "-a" "e237927e886414d43b9b3c48f5457efbbc14b5e18323f1704947a4f2bec1fc2d", kill_on_drop: false }`
[INFO] [stderr]     Checking lifeguard v0.6.1
[INFO] [stderr]     Checking assert_float_eq v1.1.4
[INFO] [stderr]     Checking regex-automata v0.4.10
[INFO] [stderr]    Compiling smallmap v1.4.2
[INFO] [stderr]    Compiling enum_dispatch v0.3.13
[INFO] [stderr]     Checking regex v1.11.2
[INFO] [stderr]     Checking env_logger v0.10.2
[INFO] [stderr]     Checking pickleback v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `remaining_slice` and `is_empty` are never used
[INFO] [stdout]   --> src/cursor.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub(crate) trait CursorExtras {
[INFO] [stdout]    |                  ------------ methods in this trait
[INFO] [stdout] 53 |     fn remaining(&self) -> u64;
[INFO] [stdout] 54 |     fn remaining_slice(&self) -> &[u8];
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 55 |     fn is_empty(&self) -> bool;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `remaining_slice` and `is_empty` are never used
[INFO] [stdout]   --> src/cursor.rs:54:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub(crate) trait CursorExtras {
[INFO] [stdout]    |                  ------------ methods in this trait
[INFO] [stdout] 53 |     fn remaining(&self) -> u64;
[INFO] [stdout] 54 |     fn remaining_slice(&self) -> &[u8];
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 55 |     fn is_empty(&self) -> bool;
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.66s
[INFO] running `Command { std: "docker" "inspect" "e237927e886414d43b9b3c48f5457efbbc14b5e18323f1704947a4f2bec1fc2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e237927e886414d43b9b3c48f5457efbbc14b5e18323f1704947a4f2bec1fc2d", kill_on_drop: false }`
[INFO] [stdout] e237927e886414d43b9b3c48f5457efbbc14b5e18323f1704947a4f2bec1fc2d