[INFO] fetching crate vulpo 0.2.0...
[INFO] testing vulpo-0.2.0 against try#2440211fe03bc45c89b6dc1a3df18382ce91e32b for pr-146098-1
[INFO] extracting crate vulpo 0.2.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate vulpo 0.2.0
[INFO] finished tweaking crates.io crate vulpo 0.2.0
[INFO] tweaked toml for crates.io crate vulpo 0.2.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate vulpo 0.2.0 on toolchain 2440211fe03bc45c89b6dc1a3df18382ce91e32b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 186 packages to latest compatible versions
[INFO] [stderr]       Adding jsonwebtoken v7.2.0 (available: v10.0.0)
[INFO] [stderr]       Adding reqwest v0.11.27 (available: v0.12.23)
[INFO] [stderr]       Adding uuid v0.8.2 (available: v1.18.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "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-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 02bf23a19536403645c1d67abfabe4f96662c7e8a434e34a91f612d2deca3519
[INFO] running `Command { std: "docker" "start" "-a" "02bf23a19536403645c1d67abfabe4f96662c7e8a434e34a91f612d2deca3519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "02bf23a19536403645c1d67abfabe4f96662c7e8a434e34a91f612d2deca3519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02bf23a19536403645c1d67abfabe4f96662c7e8a434e34a91f612d2deca3519", kill_on_drop: false }`
[INFO] [stdout] 02bf23a19536403645c1d67abfabe4f96662c7e8a434e34a91f612d2deca3519
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2440211fe03bc45c89b6dc1a3df18382ce91e32b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70cca2a5586ac186bc6be143496217984efcb54029677418ed279c40e39f030f
[INFO] running `Command { std: "docker" "start" "-a" "70cca2a5586ac186bc6be143496217984efcb54029677418ed279c40e39f030f", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling writeable v0.6.1
[INFO] [stderr]    Compiling litemap v0.8.0
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling icu_normalizer_data v2.0.0
[INFO] [stderr]    Compiling icu_properties_data v2.0.1
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling openssl v0.10.73
[INFO] [stderr]    Compiling mio v1.0.4
[INFO] [stderr]    Compiling socket2 v0.6.0
[INFO] [stderr]    Compiling http v0.2.12
[INFO] [stderr]    Compiling bitflags v2.9.4
[INFO] [stderr]    Compiling httparse v1.10.1
[INFO] [stderr]    Compiling native-tls v0.2.14
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling indexmap v2.11.4
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling try-lock v0.2.5
[INFO] [stderr]    Compiling openssl-probe v0.1.6
[INFO] [stderr]    Compiling form_urlencoded v1.2.2
[INFO] [stderr]    Compiling want v0.3.1
[INFO] [stderr]    Compiling futures-channel v0.3.31
[INFO] [stderr]    Compiling socket2 v0.5.10
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]    Compiling httpdate v1.0.3
[INFO] [stderr]    Compiling iana-time-zone v0.1.64
[INFO] [stderr]    Compiling http-body v0.4.6
[INFO] [stderr]    Compiling untrusted v0.7.1
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling base64 v0.21.7
[INFO] [stderr]    Compiling getrandom v0.2.16
[INFO] [stderr]    Compiling pem v0.8.3
[INFO] [stderr]    Compiling ipnet v2.11.0
[INFO] [stderr]    Compiling rustls-pemfile v1.0.4
[INFO] [stderr]    Compiling base64 v0.12.3
[INFO] [stderr]    Compiling sync_wrapper v0.1.2
[INFO] [stderr]    Compiling openssl-sys v0.9.109
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.0
[INFO] [stderr]    Compiling zerovec-derive v0.11.1
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling openssl-macros v0.1.1
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling zerofrom v0.1.6
[INFO] [stderr]    Compiling yoke v0.8.0
[INFO] [stderr]    Compiling zerovec v0.11.4
[INFO] [stderr]    Compiling zerotrie v0.2.2
[INFO] [stderr]    Compiling tinystr v0.8.1
[INFO] [stderr]    Compiling potential_utf v0.1.3
[INFO] [stderr]    Compiling icu_collections v2.0.0
[INFO] [stderr]    Compiling icu_locale_core v2.0.0
[INFO] [stderr]    Compiling icu_provider v2.0.0
[INFO] [stderr]    Compiling icu_normalizer v2.0.0
[INFO] [stderr]    Compiling icu_properties v2.0.1
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling chrono v0.4.42
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling idna v1.1.0
[INFO] [stderr]    Compiling url v2.5.7
[INFO] [stderr]    Compiling simple_asn1 v0.4.1
[INFO] [stderr]    Compiling jsonwebtoken v7.2.0
[INFO] [stderr]    Compiling tokio-util v0.7.16
[INFO] [stderr]    Compiling tokio-native-tls v0.3.1
[INFO] [stderr]    Compiling h2 v0.3.27
[INFO] [stderr]    Compiling hyper v0.14.32
[INFO] [stderr]    Compiling hyper-tls v0.5.0
[INFO] [stderr]    Compiling reqwest v0.11.27
[INFO] [stderr]    Compiling vulpo v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: non-binding let on a synchronization lock
[INFO] [stdout]    --> src/lib.rs:102:17
[INFO] [stdout]     |
[INFO] [stdout] 102 |             let _ = mem::replace(&mut exp, new_keys.expire_at.lock().unwrap());
[INFO] [stdout]     |                 ^ this lock is not assigned to a binding and is immediately dropped
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(let_underscore_lock)]` (part of `#[deny(let_underscore)]`) on by default
[INFO] [stdout] help: consider binding to an unused variable to avoid immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 102 |             let _unused = mem::replace(&mut exp, new_keys.expire_at.lock().unwrap());
[INFO] [stdout]     |                  ++++++
[INFO] [stdout] help: consider immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 102 -             let _ = mem::replace(&mut exp, new_keys.expire_at.lock().unwrap());
[INFO] [stdout] 102 +             drop(mem::replace(&mut exp, new_keys.expire_at.lock().unwrap()));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vulpo` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "70cca2a5586ac186bc6be143496217984efcb54029677418ed279c40e39f030f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70cca2a5586ac186bc6be143496217984efcb54029677418ed279c40e39f030f", kill_on_drop: false }`
[INFO] [stdout] 70cca2a5586ac186bc6be143496217984efcb54029677418ed279c40e39f030f