[INFO] fetching crate singleton-cell 0.3.0...
[INFO] checking singleton-cell-0.3.0 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate singleton-cell 0.3.0 into /workspace/builds/worker-42/source
[INFO] validating manifest of crates.io crate singleton-cell 0.3.0 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate singleton-cell 0.3.0
[INFO] finished tweaking crates.io crate singleton-cell 0.3.0
[INFO] tweaked toml for crates.io crate singleton-cell 0.3.0 written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] crate crates.io crate singleton-cell 0.3.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded singleton-trait v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b275f97eb2fdb873d74679f86a192699c3e595175a82eabf30b7c9452ceb854
[INFO] running `Command { std: "docker" "start" "-a" "2b275f97eb2fdb873d74679f86a192699c3e595175a82eabf30b7c9452ceb854", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b275f97eb2fdb873d74679f86a192699c3e595175a82eabf30b7c9452ceb854", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b275f97eb2fdb873d74679f86a192699c3e595175a82eabf30b7c9452ceb854", kill_on_drop: false }`
[INFO] [stdout] 2b275f97eb2fdb873d74679f86a192699c3e595175a82eabf30b7c9452ceb854
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab8c7232c00143835fb2990b9b1dc6eb8919683696ea09c5f2006b9e8f634905
[INFO] running `Command { std: "docker" "start" "-a" "ab8c7232c00143835fb2990b9b1dc6eb8919683696ea09c5f2006b9e8f634905", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking singleton-trait v0.3.0
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]     Checking singleton-cell v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new_erased`
[INFO] [stdout]    --> src/lib.rs:333:21
[INFO] [stdout]     |
[INFO] [stdout] 333 | /                     pub
[INFO] [stdout] 334 | |                     fn new_erased() -> Option<::singleton_trait::Erased<Self>> {
[INFO] [stdout] 335 | |                         Self::new().map(|x| ::singleton_trait::Erased::new(x))
[INFO] [stdout] 336 | |                     }
[INFO] [stdout]     | |_____________________^
[INFO] [stdout] ...
[INFO] [stdout] 422 |           new_singleton!(pub A);
[INFO] [stdout]     |           ---------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `new_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_erased`
[INFO] [stdout]    --> src/lib.rs:333:21
[INFO] [stdout]     |
[INFO] [stdout] 333 | /                     pub
[INFO] [stdout] 334 | |                     fn new_erased() -> Option<::singleton_trait::Erased<Self>> {
[INFO] [stdout] 335 | |                         Self::new().map(|x| ::singleton_trait::Erased::new(x))
[INFO] [stdout] 336 | |                     }
[INFO] [stdout]     | |_____________________^
[INFO] [stdout] ...
[INFO] [stdout] 429 |           new_singleton!(pub A);
[INFO] [stdout]     |           ---------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `new_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_erased`
[INFO] [stdout]    --> src/lib.rs:333:21
[INFO] [stdout]     |
[INFO] [stdout] 333 | /                     pub
[INFO] [stdout] 334 | |                     fn new_erased() -> Option<::singleton_trait::Erased<Self>> {
[INFO] [stdout] 335 | |                         Self::new().map(|x| ::singleton_trait::Erased::new(x))
[INFO] [stdout] 336 | |                     }
[INFO] [stdout]     | |_____________________^
[INFO] [stdout] ...
[INFO] [stdout] 430 |           new_singleton!(pub B);
[INFO] [stdout]     |           ---------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this warning originates in the macro `new_singleton` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `Command { std: "docker" "inspect" "ab8c7232c00143835fb2990b9b1dc6eb8919683696ea09c5f2006b9e8f634905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab8c7232c00143835fb2990b9b1dc6eb8919683696ea09c5f2006b9e8f634905", kill_on_drop: false }`
[INFO] [stdout] ab8c7232c00143835fb2990b9b1dc6eb8919683696ea09c5f2006b9e8f634905