[INFO] cloning repository https://github.com/jmlb23/MyKVDB [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jmlb23/MyKVDB" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmlb23%2FMyKVDB", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmlb23%2FMyKVDB'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 8402d632136f56c5e2d8a0884b02797f54f20a2b [INFO] checking jmlb23/MyKVDB against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmlb23%2FMyKVDB" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/jmlb23/MyKVDB on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/jmlb23/MyKVDB [INFO] finished tweaking git repo https://github.com/jmlb23/MyKVDB [INFO] tweaked toml for git repo https://github.com/jmlb23/MyKVDB written to /workspace/builds/worker-5-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/jmlb23/MyKVDB already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded jsonrpc-core-client v18.0.0 [INFO] [stderr] Downloaded jsonrpc-derive v18.0.0 [INFO] [stderr] Downloaded jsonrpc-client-transports v18.0.0 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] cb2373fe1d05d5e1ff8007b829730b126ba3cf989b65421358f43b4846010312 [INFO] running `Command { std: "docker" "start" "-a" "cb2373fe1d05d5e1ff8007b829730b126ba3cf989b65421358f43b4846010312", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "cb2373fe1d05d5e1ff8007b829730b126ba3cf989b65421358f43b4846010312", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cb2373fe1d05d5e1ff8007b829730b126ba3cf989b65421358f43b4846010312", kill_on_drop: false }` [INFO] [stdout] cb2373fe1d05d5e1ff8007b829730b126ba3cf989b65421358f43b4846010312 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 6167961e84f74d32b2b9b797e976ab723ff607593d63bbc20b26da847f4b8896 [INFO] running `Command { std: "docker" "start" "-a" "6167961e84f74d32b2b9b797e976ab723ff607593d63bbc20b26da847f4b8896", kill_on_drop: false }` [INFO] [stderr] Compiling syn v1.0.82 [INFO] [stderr] Compiling memchr v2.4.1 [INFO] [stderr] Compiling log v0.4.14 [INFO] [stderr] Compiling serde v1.0.131 [INFO] [stderr] Compiling futures-util v0.3.18 [INFO] [stderr] Checking futures v0.1.31 [INFO] [stderr] Compiling ryu v1.0.6 [INFO] [stderr] Compiling serde_json v1.0.72 [INFO] [stderr] Compiling getrandom v0.1.16 [INFO] [stderr] Compiling tokio v1.14.0 [INFO] [stderr] Checking tinyvec v1.5.1 [INFO] [stderr] Checking mio v0.7.14 [INFO] [stderr] Compiling unicase v2.6.0 [INFO] [stderr] Checking unicode-bidi v0.3.7 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking regex-syntax v0.6.25 [INFO] [stderr] Checking tracing-core v0.1.21 [INFO] [stderr] Checking aho-corasick v0.7.18 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking bstr v0.2.17 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Compiling convert_case v0.4.0 [INFO] [stderr] Checking unicode-normalization v0.1.19 [INFO] [stderr] Checking want v0.3.0 [INFO] [stderr] Checking tracing v0.1.29 [INFO] [stderr] Checking net2 v0.2.37 [INFO] [stderr] Checking regex v1.5.4 [INFO] [stderr] Checking idna v0.1.5 [INFO] [stderr] Checking globset v0.4.8 [INFO] [stderr] Checking url v1.7.2 [INFO] [stderr] Checking tokio-util v0.6.9 [INFO] [stderr] Checking tokio-stream v0.1.8 [INFO] [stderr] Compiling serde_derive v1.0.131 [INFO] [stderr] Compiling futures-macro v0.3.18 [INFO] [stderr] Compiling derive_more v0.99.17 [INFO] [stderr] Checking futures-executor v0.3.18 [INFO] [stderr] Checking hyper v0.14.15 [INFO] [stderr] Checking futures v0.3.18 [INFO] [stderr] Compiling toml v0.5.8 [INFO] [stderr] Checking jsonrpc-core v18.0.0 [INFO] [stderr] Checking jsonrpc-pubsub v18.0.0 [INFO] [stderr] Checking jsonrpc-server-utils v18.0.0 [INFO] [stderr] Checking jsonrpc-http-server v18.0.0 [INFO] [stderr] Checking jsonrpc-client-transports v18.0.0 [INFO] [stderr] Compiling proc-macro-crate v0.1.5 [INFO] [stderr] Checking jsonrpc-core-client v18.0.0 [INFO] [stderr] Compiling jsonrpc-derive v18.0.0 [INFO] [stderr] Checking server v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/api.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | &self.store.remove(&key); [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] 46 | let _ = &self.store.remove(&key); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/api.rs:47:9 [INFO] [stdout] | [INFO] [stdout] 47 | &self.store.insert(&key, &new_value); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 47 | let _ = &self.store.insert(&key, &new_value); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/store_api.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 17 | / &self [INFO] [stdout] 18 | | .store [INFO] [stdout] 19 | | .try_lock().expect("Can't write") [INFO] [stdout] 20 | | .insert(key.to_owned(), (value.to_owned(), None)); [INFO] [stdout] | |_____________________________________________________________^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 17 | let _ = &self [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/store_api.rs:24:9 [INFO] [stdout] | [INFO] [stdout] 24 | / &self.store.try_lock().expect("Can't write").insert( [INFO] [stdout] 25 | | key.to_owned(), [INFO] [stdout] 26 | | (value.to_owned(), Some(epoch() + u64::from(ttl))), [INFO] [stdout] 27 | | ); [INFO] [stdout] | |_________^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 24 | let _ = &self.store.try_lock().expect("Can't write").insert( [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/store_api.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | &self.store.try_lock().expect("Can't write").remove(key); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 30 | let _ = &self.store.try_lock().expect("Can't write").remove(key); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/store_api.rs:49:25 [INFO] [stdout] | [INFO] [stdout] 49 | &store.remove(key); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 49 | let _ = &store.remove(key); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/api.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | &self.store.remove(&key); [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] 46 | let _ = &self.store.remove(&key); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/api.rs:47:9 [INFO] [stdout] | [INFO] [stdout] 47 | &self.store.insert(&key, &new_value); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 47 | let _ = &self.store.insert(&key, &new_value); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/store_api.rs:17:9 [INFO] [stdout] | [INFO] [stdout] 17 | / &self [INFO] [stdout] 18 | | .store [INFO] [stdout] 19 | | .try_lock().expect("Can't write") [INFO] [stdout] 20 | | .insert(key.to_owned(), (value.to_owned(), None)); [INFO] [stdout] | |_____________________________________________________________^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 17 | let _ = &self [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/store_api.rs:24:9 [INFO] [stdout] | [INFO] [stdout] 24 | / &self.store.try_lock().expect("Can't write").insert( [INFO] [stdout] 25 | | key.to_owned(), [INFO] [stdout] 26 | | (value.to_owned(), Some(epoch() + u64::from(ttl))), [INFO] [stdout] 27 | | ); [INFO] [stdout] | |_________^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 24 | let _ = &self.store.try_lock().expect("Can't write").insert( [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/store_api.rs:30:9 [INFO] [stdout] | [INFO] [stdout] 30 | &self.store.try_lock().expect("Can't write").remove(key); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 30 | let _ = &self.store.try_lock().expect("Can't write").remove(key); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/lib/store_api.rs:49:25 [INFO] [stdout] | [INFO] [stdout] 49 | &store.remove(key); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 49 | let _ = &store.remove(key); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 41.58s [INFO] running `Command { std: "docker" "inspect" "6167961e84f74d32b2b9b797e976ab723ff607593d63bbc20b26da847f4b8896", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6167961e84f74d32b2b9b797e976ab723ff607593d63bbc20b26da847f4b8896", kill_on_drop: false }` [INFO] [stdout] 6167961e84f74d32b2b9b797e976ab723ff607593d63bbc20b26da847f4b8896