[INFO] fetching crate keratin 0.2.7...
[INFO] checking keratin-0.2.7 against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] extracting crate keratin 0.2.7 into /workspace/builds/worker-34/source
[INFO] validating manifest of crates.io crate keratin 0.2.7 on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate keratin 0.2.7
[INFO] finished tweaking crates.io crate keratin 0.2.7
[INFO] tweaked toml for crates.io crate keratin 0.2.7 written to /workspace/builds/worker-34/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2c9ec9041b4428ef3333e79e4d2d2c332a048cf8666529df2a790f4bdc576d8f
[INFO] running `Command { std: "docker" "start" "-a" "2c9ec9041b4428ef3333e79e4d2d2c332a048cf8666529df2a790f4bdc576d8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2c9ec9041b4428ef3333e79e4d2d2c332a048cf8666529df2a790f4bdc576d8f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c9ec9041b4428ef3333e79e4d2d2c332a048cf8666529df2a790f4bdc576d8f", kill_on_drop: false }`
[INFO] [stdout] 2c9ec9041b4428ef3333e79e4d2d2c332a048cf8666529df2a790f4bdc576d8f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-34/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ea59bdf3e335e31546a351a476c777d433e2474f0f91da3456feb82f110b53d
[INFO] running `Command { std: "docker" "start" "-a" "4ea59bdf3e335e31546a351a476c777d433e2474f0f91da3456feb82f110b53d", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.108
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling ryu v1.0.6
[INFO] [stderr]    Compiling serde_json v1.0.72
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking md5 v0.7.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling syn v1.0.82
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking bson v1.2.4
[INFO] [stderr]     Checking keratin v0.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `coll_prefix`
[INFO] [stdout]   --> src/storage.rs:35:46
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn cache_entries(&self, data_path: &str, coll_prefix: &str) -> HashMap<String, Entry<T>> {
[INFO] [stdout]    |                                              ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_coll_prefix`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `coll_prefix`
[INFO] [stdout]   --> src/storage.rs:35:46
[INFO] [stdout]    |
[INFO] [stdout] 35 |     fn cache_entries(&self, data_path: &str, coll_prefix: &str) -> HashMap<String, Entry<T>> {
[INFO] [stdout]    |                                              ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_coll_prefix`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `project`
[INFO] [stdout]   --> src/config/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     project: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `config_file_path`
[INFO] [stdout]   --> src/config/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     config_file_path: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `primary_key`
[INFO] [stdout]   --> src/config/mod.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     primary_key: String, // Default: Collection name hash prefix + Hashed data
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `project`
[INFO] [stdout]   --> src/config/mod.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     project: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `config_file_path`
[INFO] [stdout]   --> src/config/mod.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     config_file_path: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `primary_key`
[INFO] [stdout]   --> src/config/mod.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     primary_key: String, // Default: Collection name hash prefix + Hashed data
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.65s
[INFO] running `Command { std: "docker" "inspect" "4ea59bdf3e335e31546a351a476c777d433e2474f0f91da3456feb82f110b53d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ea59bdf3e335e31546a351a476c777d433e2474f0f91da3456feb82f110b53d", kill_on_drop: false }`
[INFO] [stdout] 4ea59bdf3e335e31546a351a476c777d433e2474f0f91da3456feb82f110b53d