[INFO] fetching crate zoea 0.0.9...
[INFO] checking zoea-0.0.9 against try#15a786332e2f0dd343b226ab6bb8ec028a350f73 for pr-81782
[INFO] extracting crate zoea 0.0.9 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate zoea 0.0.9 on toolchain 15a786332e2f0dd343b226ab6bb8ec028a350f73
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate zoea 0.0.9
[INFO] finished tweaking crates.io crate zoea 0.0.9
[INFO] tweaked toml for crates.io crate zoea 0.0.9 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_distr v0.2.2
[INFO] [stderr]   Downloaded generic-array v0.13.2
[INFO] [stderr]   Downloaded paste v0.1.18
[INFO] [stderr]   Downloaded simba v0.1.5
[INFO] [stderr]   Downloaded sqlite v0.25.3
[INFO] [stderr]   Downloaded nalgebra v0.21.1
[INFO] [stderr]   Downloaded rawpointer v0.2.1
[INFO] [stderr]   Downloaded paste-impl v0.1.18
[INFO] [stderr]   Downloaded matrixmultiply v0.2.4
[INFO] [stderr]   Downloaded libm v0.2.1
[INFO] [stderr]   Downloaded sqlite3-src v0.2.12
[INFO] [stderr]   Downloaded sqlite3-sys v0.12.0
[INFO] [stderr]   Downloaded curl-sys v0.4.40+curl-7.75.0
[INFO] [stderr]   Downloaded porter-stemmer v0.1.2
[INFO] [stderr]   Downloaded rust-stemmers v1.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 07e0da4caf8741aae0fab57b35aae4cf2029494cba69b5eba022c7f3dae4d633
[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" "07e0da4caf8741aae0fab57b35aae4cf2029494cba69b5eba022c7f3dae4d633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "07e0da4caf8741aae0fab57b35aae4cf2029494cba69b5eba022c7f3dae4d633", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07e0da4caf8741aae0fab57b35aae4cf2029494cba69b5eba022c7f3dae4d633", kill_on_drop: false }`
[INFO] [stdout] 07e0da4caf8741aae0fab57b35aae4cf2029494cba69b5eba022c7f3dae4d633
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+15a786332e2f0dd343b226ab6bb8ec028a350f73" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c27b30887b96d51d5eb1f0406a84ed356116e39958885543f6d5c853e0109a9
[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" "7c27b30887b96d51d5eb1f0406a84ed356116e39958885543f6d5c853e0109a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling libm v0.2.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling serde_derive v1.0.123
[INFO] [stderr]    Compiling curl v0.4.34
[INFO] [stderr]     Checking unicode-segmentation v1.7.1
[INFO] [stderr]     Checking openssl-probe v0.1.2
[INFO] [stderr]     Checking seahash v4.1.0
[INFO] [stderr]     Checking matrixmultiply v0.2.4
[INFO] [stderr]     Checking generic-array v0.13.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]     Checking porter-stemmer v0.1.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking socket2 v0.3.19
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling openssl-sys v0.9.60
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]    Compiling sqlite3-src v0.2.12
[INFO] [stderr]    Compiling curl-sys v0.4.40+curl-7.75.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking sqlite3-sys v0.12.0
[INFO] [stderr]     Checking sqlite v0.25.3
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking simba v0.1.5
[INFO] [stderr]     Checking rand_distr v0.2.2
[INFO] [stderr]     Checking nalgebra v0.21.1
[INFO] [stderr]     Checking rust-stemmers v1.2.0
[INFO] [stderr]     Checking zoea v0.0.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `keys`
[INFO] [stdout]   --> src/kv_database.rs:75:9
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let keys = list_keys(&db);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_keys`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `non_value`
[INFO] [stdout]   --> src/kv_database.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 |     let non_value = get(&db, &non_key); // returns String::new();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_non_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.56s
[INFO] running `Command { std: "docker" "inspect" "7c27b30887b96d51d5eb1f0406a84ed356116e39958885543f6d5c853e0109a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c27b30887b96d51d5eb1f0406a84ed356116e39958885543f6d5c853e0109a9", kill_on_drop: false }`
[INFO] [stdout] 7c27b30887b96d51d5eb1f0406a84ed356116e39958885543f6d5c853e0109a9