[INFO] fetching crate microkv 0.2.6...
[INFO] testing microkv-0.2.6 against 1.55.0 for beta-1.56-1
[INFO] extracting crate microkv 0.2.6 into /workspace/builds/worker-110/source
[INFO] validating manifest of crates.io crate microkv 0.2.6 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate microkv 0.2.6
[INFO] finished tweaking crates.io crate microkv 0.2.6
[INFO] tweaked toml for crates.io crate microkv 0.2.6 written to /workspace/builds/worker-110/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded secstr v0.4.0
[INFO] [stderr]   Downloaded sodiumoxide v0.2.7
[INFO] [stderr]   Downloaded libsodium-sys v0.2.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c4d776d4cea9f0103f860afa3a3bd24fe2479eaccc72fe149d846be4c75e8d61
[INFO] running `Command { std: "docker" "start" "-a" "c4d776d4cea9f0103f860afa3a3bd24fe2479eaccc72fe149d846be4c75e8d61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c4d776d4cea9f0103f860afa3a3bd24fe2479eaccc72fe149d846be4c75e8d61", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4d776d4cea9f0103f860afa3a3bd24fe2479eaccc72fe149d846be4c75e8d61", kill_on_drop: false }`
[INFO] [stdout] c4d776d4cea9f0103f860afa3a3bd24fe2479eaccc72fe149d846be4c75e8d61
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51a73bfd0eaa217d32787aecfc54bf584f24058adf66e8d258203529c13283f1
[INFO] running `Command { std: "docker" "start" "-a" "51a73bfd0eaa217d32787aecfc54bf584f24058adf66e8d258203529c13283f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling signature v1.3.1
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling ed25519 v1.2.0
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling libsodium-sys v0.2.7
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling secstr v0.4.0
[INFO] [stderr]    Compiling sodiumoxide v0.2.7
[INFO] [stderr]    Compiling microkv v0.2.6 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 12s
[INFO] running `Command { std: "docker" "inspect" "51a73bfd0eaa217d32787aecfc54bf584f24058adf66e8d258203529c13283f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51a73bfd0eaa217d32787aecfc54bf584f24058adf66e8d258203529c13283f1", kill_on_drop: false }`
[INFO] [stdout] 51a73bfd0eaa217d32787aecfc54bf584f24058adf66e8d258203529c13283f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f2b13bc7119d38fa0025849a1333253ab740dd11b4bce5e3d645557143f3380e
[INFO] running `Command { std: "docker" "start" "-a" "f2b13bc7119d38fa0025849a1333253ab740dd11b4bce5e3d645557143f3380e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling microkv v0.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> tests/tests.rs:28:22
[INFO] [stdout]    |
[INFO] [stdout] 28 |     kv.put(KEY_NAME, value).expect("cannot insert value");
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      expected reference, found `u64`
[INFO] [stdout]    |                      help: consider borrowing here: `&value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected reference `&_`
[INFO] [stdout]                    found type `u64`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> tests/tests.rs:39:22
[INFO] [stdout]    |
[INFO] [stdout] 39 |     kv.put(KEY_NAME, value).expect("cannot insert value");
[INFO] [stdout]    |                      ^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      expected reference, found `i32`
[INFO] [stdout]    |                      help: consider borrowing here: `&value`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected reference `&_`
[INFO] [stdout]                    found type `i32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `microkv` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "f2b13bc7119d38fa0025849a1333253ab740dd11b4bce5e3d645557143f3380e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2b13bc7119d38fa0025849a1333253ab740dd11b4bce5e3d645557143f3380e", kill_on_drop: false }`
[INFO] [stdout] f2b13bc7119d38fa0025849a1333253ab740dd11b4bce5e3d645557143f3380e