[INFO] fetching crate gravitron_utils 0.1.5...
[INFO] checking gravitron_utils-0.1.5 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] extracting crate gravitron_utils 0.1.5 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate gravitron_utils 0.1.5
[INFO] finished tweaking crates.io crate gravitron_utils 0.1.5
[INFO] tweaked toml for crates.io crate gravitron_utils 0.1.5 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate gravitron_utils 0.1.5 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate gravitron_utils 0.1.5 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0f0ef60db2f29a66838e3248c141cf42a3dcc47a0c2c3b01216d843688be3859
[INFO] running `Command { std: "docker" "start" "-a" "0f0ef60db2f29a66838e3248c141cf42a3dcc47a0c2c3b01216d843688be3859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0f0ef60db2f29a66838e3248c141cf42a3dcc47a0c2c3b01216d843688be3859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f0ef60db2f29a66838e3248c141cf42a3dcc47a0c2c3b01216d843688be3859", kill_on_drop: false }`
[INFO] [stdout] 0f0ef60db2f29a66838e3248c141cf42a3dcc47a0c2c3b01216d843688be3859
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1407fd4526d557e7a6cc882aea71ccb0aa2be7278eef102365a29d5f1674fdcb
[INFO] running `Command { std: "docker" "start" "-a" "1407fd4526d557e7a6cc882aea71ccb0aa2be7278eef102365a29d5f1674fdcb", kill_on_drop: false }`
[INFO] [stderr]     Checking gravitron_utils v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/thread/mutator.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |   pub fn get(&self) -> std::sync::MutexGuard<T> {
[INFO] [stdout]    |              ^^^^^     ------------------------ the same lifetime is hidden here
[INFO] [stdout]    |              |
[INFO] [stdout]    |              the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 19 |   pub fn get(&self) -> std::sync::MutexGuard<'_, T> {
[INFO] [stdout]    |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> src/thread/mutator.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |   pub fn get(&self) -> std::sync::MutexGuard<T> {
[INFO] [stdout]    |              ^^^^^     ------------------------ the same lifetime is hidden here
[INFO] [stdout]    |              |
[INFO] [stdout]    |              the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 19 |   pub fn get(&self) -> std::sync::MutexGuard<'_, T> {
[INFO] [stdout]    |                                              +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `Command { std: "docker" "inspect" "1407fd4526d557e7a6cc882aea71ccb0aa2be7278eef102365a29d5f1674fdcb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1407fd4526d557e7a6cc882aea71ccb0aa2be7278eef102365a29d5f1674fdcb", kill_on_drop: false }`
[INFO] [stdout] 1407fd4526d557e7a6cc882aea71ccb0aa2be7278eef102365a29d5f1674fdcb