[INFO] fetching crate microkv 0.2.6...
[INFO] checking microkv-0.2.6 against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] extracting crate microkv 0.2.6 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate microkv 0.2.6 on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "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-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 002026e7d146e8750be250fc8126f15b0ff554923dabc5608cc88d22f85a1610
[INFO] running `Command { std: "docker" "start" "-a" "002026e7d146e8750be250fc8126f15b0ff554923dabc5608cc88d22f85a1610", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "002026e7d146e8750be250fc8126f15b0ff554923dabc5608cc88d22f85a1610", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "002026e7d146e8750be250fc8126f15b0ff554923dabc5608cc88d22f85a1610", kill_on_drop: false }`
[INFO] [stdout] 002026e7d146e8750be250fc8126f15b0ff554923dabc5608cc88d22f85a1610
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f8d4c01e8f4ba9be49d9f4be9112204573fc9a148d82c625dc59b669fff62c8
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1f8d4c01e8f4ba9be49d9f4be9112204573fc9a148d82c625dc59b669fff62c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libsodium-sys v0.2.6
[INFO] [stderr]    Compiling indexmap v1.6.2
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]     Checking serde v1.0.125
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking secstr v0.4.0
[INFO] [stderr]     Checking sodiumoxide v0.2.6
[INFO] [stderr]     Checking 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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "1f8d4c01e8f4ba9be49d9f4be9112204573fc9a148d82c625dc59b669fff62c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f8d4c01e8f4ba9be49d9f4be9112204573fc9a148d82c625dc59b669fff62c8", kill_on_drop: false }`
[INFO] [stdout] 1f8d4c01e8f4ba9be49d9f4be9112204573fc9a148d82c625dc59b669fff62c8