[INFO] fetching crate hotpot-db 0.0.2...
[INFO] testing hotpot-db-0.0.2 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate hotpot-db 0.0.2 into /workspace/builds/worker-88/source
[INFO] validating manifest of crates.io crate hotpot-db 0.0.2 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate hotpot-db 0.0.2
[INFO] finished tweaking crates.io crate hotpot-db 0.0.2
[INFO] tweaked toml for crates.io crate hotpot-db 0.0.2 written to /workspace/builds/worker-88/source/Cargo.toml
[INFO] crate crates.io crate hotpot-db 0.0.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rusqlite v0.21.0
[INFO] [stderr]   Downloaded serde_json v1.0.47
[INFO] [stderr]   Downloaded libsqlite3-sys v0.17.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] abe8f1c15eed1cb863303e26a1366b56366f7e4af8afdc73983ccb7cb1120182
[INFO] running `Command { std: "docker" "start" "-a" "abe8f1c15eed1cb863303e26a1366b56366f7e4af8afdc73983ccb7cb1120182", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "abe8f1c15eed1cb863303e26a1366b56366f7e4af8afdc73983ccb7cb1120182", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "abe8f1c15eed1cb863303e26a1366b56366f7e4af8afdc73983ccb7cb1120182", kill_on_drop: false }`
[INFO] [stdout] abe8f1c15eed1cb863303e26a1366b56366f7e4af8afdc73983ccb7cb1120182
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca6386b789eee5c36330b6c023827e97972be6d411c54f84918efbe3c850eefc
[INFO] running `Command { std: "docker" "start" "-a" "ca6386b789eee5c36330b6c023827e97972be6d411c54f84918efbe3c850eefc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling cc v1.0.50
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling ryu v1.0.2
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling memchr v2.3.0
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling linked-hash-map v0.5.2
[INFO] [stderr]    Compiling fallible-streaming-iterator v0.1.9
[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling lru-cache v0.1.2
[INFO] [stderr]    Compiling libsqlite3-sys v0.17.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling serde_json v1.0.47
[INFO] [stderr]    Compiling rusqlite v0.21.0
[INFO] [stderr]    Compiling hotpot-db v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/lib.rs:391:13
[INFO] [stdout]     |
[INFO] [stdout] 391 |         let res = stmt.execute(params![])?;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:207:9
[INFO] [stdout]     |
[INFO] [stdout] 207 | /         &self
[INFO] [stdout] 208 | |             .conn
[INFO] [stdout] 209 | |             .execute(
[INFO] [stdout] 210 | |                 &format!(
[INFO] [stdout] ...   |
[INFO] [stdout] 220 | |             )
[INFO] [stdout] 221 | |             .map_err(|_| Error::General);
[INFO] [stdout]     | |________________________________________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 207 |         let _ = &self
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:222:9
[INFO] [stdout]     |
[INFO] [stdout] 222 | /         &self.collections.insert(
[INFO] [stdout] 223 | |             String::from(name),
[INFO] [stdout] 224 | |             Collection {
[INFO] [stdout] 225 | |                 name: String::from(name),
[INFO] [stdout] 226 | |             },
[INFO] [stdout] 227 | |         );
[INFO] [stdout]     | |_________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 222 |         let _ = &self.collections.insert(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 40.60s
[INFO] running `Command { std: "docker" "inspect" "ca6386b789eee5c36330b6c023827e97972be6d411c54f84918efbe3c850eefc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca6386b789eee5c36330b6c023827e97972be6d411c54f84918efbe3c850eefc", kill_on_drop: false }`
[INFO] [stdout] ca6386b789eee5c36330b6c023827e97972be6d411c54f84918efbe3c850eefc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9c421d1dd491fe88e61d2a6c64baefaf6451d04161b4e1b2980ed53df21a9e0
[INFO] running `Command { std: "docker" "start" "-a" "d9c421d1dd491fe88e61d2a6c64baefaf6451d04161b4e1b2980ed53df21a9e0", kill_on_drop: false }`
[INFO] [stderr]    Compiling hotpot-db v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/lib.rs:391:13
[INFO] [stdout]     |
[INFO] [stdout] 391 |         let res = stmt.execute(params![])?;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:207:9
[INFO] [stdout]     |
[INFO] [stdout] 207 | /         &self
[INFO] [stdout] 208 | |             .conn
[INFO] [stdout] 209 | |             .execute(
[INFO] [stdout] 210 | |                 &format!(
[INFO] [stdout] ...   |
[INFO] [stdout] 220 | |             )
[INFO] [stdout] 221 | |             .map_err(|_| Error::General);
[INFO] [stdout]     | |________________________________________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 207 |         let _ = &self
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:222:9
[INFO] [stdout]     |
[INFO] [stdout] 222 | /         &self.collections.insert(
[INFO] [stdout] 223 | |             String::from(name),
[INFO] [stdout] 224 | |             Collection {
[INFO] [stdout] 225 | |                 name: String::from(name),
[INFO] [stdout] 226 | |             },
[INFO] [stdout] 227 | |         );
[INFO] [stdout]     | |_________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 222 |         let _ = &self.collections.insert(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `res`
[INFO] [stdout]    --> src/lib.rs:391:13
[INFO] [stdout]     |
[INFO] [stdout] 391 |         let res = stmt.execute(params![])?;
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:207:9
[INFO] [stdout]     |
[INFO] [stdout] 207 | /         &self
[INFO] [stdout] 208 | |             .conn
[INFO] [stdout] 209 | |             .execute(
[INFO] [stdout] 210 | |                 &format!(
[INFO] [stdout] ...   |
[INFO] [stdout] 220 | |             )
[INFO] [stdout] 221 | |             .map_err(|_| Error::General);
[INFO] [stdout]     | |________________________________________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 207 |         let _ = &self
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:222:9
[INFO] [stdout]     |
[INFO] [stdout] 222 | /         &self.collections.insert(
[INFO] [stdout] 223 | |             String::from(name),
[INFO] [stdout] 224 | |             Collection {
[INFO] [stdout] 225 | |                 name: String::from(name),
[INFO] [stdout] 226 | |             },
[INFO] [stdout] 227 | |         );
[INFO] [stdout]     | |_________^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 222 |         let _ = &self.collections.insert(
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.56s
[INFO] running `Command { std: "docker" "inspect" "d9c421d1dd491fe88e61d2a6c64baefaf6451d04161b4e1b2980ed53df21a9e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9c421d1dd491fe88e61d2a6c64baefaf6451d04161b4e1b2980ed53df21a9e0", kill_on_drop: false }`
[INFO] [stdout] d9c421d1dd491fe88e61d2a6c64baefaf6451d04161b4e1b2980ed53df21a9e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4e7d78c053781cb19106db76d7e5e7206a86a79618609d275b4039184ef18630
[INFO] running `Command { std: "docker" "start" "-a" "4e7d78c053781cb19106db76d7e5e7206a86a79618609d275b4039184ef18630", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `res`
[INFO] [stderr]    --> src/lib.rs:391:13
[INFO] [stderr]     |
[INFO] [stderr] 391 |         let res = stmt.execute(params![])?;
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_res`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/lib.rs:207:9
[INFO] [stderr]     |
[INFO] [stderr] 207 | /         &self
[INFO] [stderr] 208 | |             .conn
[INFO] [stderr] 209 | |             .execute(
[INFO] [stderr] 210 | |                 &format!(
[INFO] [stderr] ...   |
[INFO] [stderr] 220 | |             )
[INFO] [stderr] 221 | |             .map_err(|_| Error::General);
[INFO] [stderr]     | |________________________________________^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 207 |         let _ = &self
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/lib.rs:222:9
[INFO] [stderr]     |
[INFO] [stderr] 222 | /         &self.collections.insert(
[INFO] [stderr] 223 | |             String::from(name),
[INFO] [stderr] 224 | |             Collection {
[INFO] [stderr] 225 | |                 name: String::from(name),
[INFO] [stderr] 226 | |             },
[INFO] [stderr] 227 | |         );
[INFO] [stderr]     | |_________^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 222 |         let _ = &self.collections.insert(
[INFO] [stderr]     |         +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `hotpot-db` (lib) generated 3 warnings
[INFO] [stderr] warning: `hotpot-db` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hotpot_db-99f9be5ece01dbb4)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests hotpot-db
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "4e7d78c053781cb19106db76d7e5e7206a86a79618609d275b4039184ef18630", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e7d78c053781cb19106db76d7e5e7206a86a79618609d275b4039184ef18630", kill_on_drop: false }`
[INFO] [stdout] 4e7d78c053781cb19106db76d7e5e7206a86a79618609d275b4039184ef18630