[INFO] fetching crate singleton-cell 0.3.1...
[INFO] checking singleton-cell-0.3.1 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate singleton-cell 0.3.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate singleton-cell 0.3.1 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate singleton-cell 0.3.1
[INFO] finished tweaking crates.io crate singleton-cell 0.3.1
[INFO] tweaked toml for crates.io crate singleton-cell 0.3.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate singleton-cell 0.3.1 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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed2359589ca1b5b4fa859237c2d4a6f1bd8799ca01306e1118e06245767905bd
[INFO] running `Command { std: "docker" "start" "-a" "ed2359589ca1b5b4fa859237c2d4a6f1bd8799ca01306e1118e06245767905bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed2359589ca1b5b4fa859237c2d4a6f1bd8799ca01306e1118e06245767905bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed2359589ca1b5b4fa859237c2d4a6f1bd8799ca01306e1118e06245767905bd", kill_on_drop: false }`
[INFO] [stdout] ed2359589ca1b5b4fa859237c2d4a6f1bd8799ca01306e1118e06245767905bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8f2498ca376d38cf998315c39f045b9c5c17048667f5500d3e115c467d5af1d
[INFO] running `Command { std: "docker" "start" "-a" "e8f2498ca376d38cf998315c39f045b9c5c17048667f5500d3e115c467d5af1d", kill_on_drop: false }`
[INFO] [stderr]     Checking singleton-trait v0.3.0
[INFO] [stderr]    Compiling paste v1.0.7
[INFO] [stderr]     Checking singleton-cell v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `crate as singleton_cell`
[INFO] [stdout]    --> src/lib.rs:351:9
[INFO] [stdout]     |
[INFO] [stdout] 351 |     use crate as singleton_cell;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lib.rs:400:30
[INFO] [stdout]     |
[INFO] [stdout] 400 |             struct Local<'a>(&'a ());
[INFO] [stdout]     |                    -----     ^^^^^^
[INFO] [stdout]     |                    |
[INFO] [stdout]     |                    field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider removing this field
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new_erased` is never used
[INFO] [stdout]    --> src/lib.rs:333:24
[INFO] [stdout]     |
[INFO] [stdout] 303 |                 impl $Name {
[INFO] [stdout]     |                 ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |                     fn new_erased() -> Option<$crate::Erased<Self>> {
[INFO] [stdout]     |                        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 422 |         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 `new_erased` is never used
[INFO] [stdout]    --> src/lib.rs:333:24
[INFO] [stdout]     |
[INFO] [stdout] 303 |                 impl $Name {
[INFO] [stdout]     |                 ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |                     fn new_erased() -> Option<$crate::Erased<Self>> {
[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 `new_erased` is never used
[INFO] [stdout]    --> src/lib.rs:333:24
[INFO] [stdout]     |
[INFO] [stdout] 303 |                 impl $Name {
[INFO] [stdout]     |                 ---------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 333 |                     fn new_erased() -> Option<$crate::Erased<Self>> {
[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: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "e8f2498ca376d38cf998315c39f045b9c5c17048667f5500d3e115c467d5af1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8f2498ca376d38cf998315c39f045b9c5c17048667f5500d3e115c467d5af1d", kill_on_drop: false }`
[INFO] [stdout] e8f2498ca376d38cf998315c39f045b9c5c17048667f5500d3e115c467d5af1d