[INFO] fetching crate vial 0.1.9...
[INFO] checking vial-0.1.9 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate vial 0.1.9 into /workspace/builds/worker-75/source
[INFO] validating manifest of crates.io crate vial 0.1.9 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vial 0.1.9
[INFO] removed 6 missing examples
[INFO] finished tweaking crates.io crate vial 0.1.9
[INFO] tweaked toml for crates.io crate vial 0.1.9 written to /workspace/builds/worker-75/source/Cargo.toml
[INFO] crate crates.io crate vial 0.1.9 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f3d08bb9dce7c6728a9b94aa35ff37978172346027251d7055dbe87e407a3b9
[INFO] running `Command { std: "docker" "start" "-a" "8f3d08bb9dce7c6728a9b94aa35ff37978172346027251d7055dbe87e407a3b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f3d08bb9dce7c6728a9b94aa35ff37978172346027251d7055dbe87e407a3b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f3d08bb9dce7c6728a9b94aa35ff37978172346027251d7055dbe87e407a3b9", kill_on_drop: false }`
[INFO] [stdout] 8f3d08bb9dce7c6728a9b94aa35ff37978172346027251d7055dbe87e407a3b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-75/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 33a473824f8771378204c67a8c7df1999bb9a91b1f2a64f28c2c5d5d94e7b7a2
[INFO] running `Command { std: "docker" "start" "-a" "33a473824f8771378204c67a8c7df1999bb9a91b1f2a64f28c2c5d5d94e7b7a2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling vial v0.1.9 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking libc-strftime v0.2.0
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stdout] warning: unknown `doc` attribute `Hidden`
[INFO] [stdout]    --> src/request.rs:303:11
[INFO] [stdout]     |
[INFO] [stdout] 303 |     #[doc(Hidden)]
[INFO] [stdout]     |           ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown `doc` attribute `Hidden`
[INFO] [stdout]    --> src/request.rs:303:11
[INFO] [stdout]     |
[INFO] [stdout] 303 |     #[doc(Hidden)]
[INFO] [stdout]     |           ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(invalid_doc_attributes)]` on by default
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/cache.rs:70:26
[INFO] [stdout]    |
[INFO] [stdout] 70 |         while self.mutex.compare_and_swap(0, 1, Ordering::SeqCst) != 0 {}
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/cache.rs:75:28
[INFO] [stdout]    |
[INFO] [stdout] 75 |         assert!(self.mutex.compare_and_swap(1, 0, Ordering::SeqCst) == 1);
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/cache.rs:70:26
[INFO] [stdout]    |
[INFO] [stdout] 70 |         while self.mutex.compare_and_swap(0, 1, Ordering::SeqCst) != 0 {}
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::sync::atomic::AtomicUsize::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/cache.rs:75:28
[INFO] [stdout]    |
[INFO] [stdout] 75 |         assert!(self.mutex.compare_and_swap(1, 0, Ordering::SeqCst) == 1);
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.09s
[INFO] running `Command { std: "docker" "inspect" "33a473824f8771378204c67a8c7df1999bb9a91b1f2a64f28c2c5d5d94e7b7a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33a473824f8771378204c67a8c7df1999bb9a91b1f2a64f28c2c5d5d94e7b7a2", kill_on_drop: false }`
[INFO] [stdout] 33a473824f8771378204c67a8c7df1999bb9a91b1f2a64f28c2c5d5d94e7b7a2