[INFO] fetching crate pagecache 0.19.4...
[INFO] checking pagecache-0.19.4 against master#39cb3386ddc6c71657418be28dbb3987eea4aa4b for pr-133536
[INFO] extracting crate pagecache 0.19.4 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate pagecache 0.19.4 on toolchain 39cb3386ddc6c71657418be28dbb3987eea4aa4b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pagecache 0.19.4
[INFO] finished tweaking crates.io crate pagecache 0.19.4
[INFO] tweaked toml for crates.io crate pagecache 0.19.4 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 90 packages to latest compatible versions
[INFO] [stderr]       Adding crossbeam-channel v0.3.9 (available: v0.5.13)
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[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded zstd v0.4.28+zstd.1.4.3
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 853df1f05a164a00eba3f12c78875ecb3057e4040b23d5e2eabb7555758bd47f
[INFO] running `Command { std: "docker" "start" "-a" "853df1f05a164a00eba3f12c78875ecb3057e4040b23d5e2eabb7555758bd47f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "853df1f05a164a00eba3f12c78875ecb3057e4040b23d5e2eabb7555758bd47f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "853df1f05a164a00eba3f12c78875ecb3057e4040b23d5e2eabb7555758bd47f", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+39cb3386ddc6c71657418be28dbb3987eea4aa4b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f84b0e96008ac58d024990a0c11d1719ebf350a442d3da40c780113f64dcc9bf
[INFO] running `Command { std: "docker" "start" "-a" "f84b0e96008ac58d024990a0c11d1719ebf350a442d3da40c780113f64dcc9bf", kill_on_drop: false }`
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[INFO] [stderr]    Compiling semver-parser v0.7.0
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[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling zerocopy-derive v0.7.35
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[INFO] [stdout] warning: unused imports: `DoublyLinkedList` and `Item`
[INFO] [stdout]  --> src/ds/mod.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use self::dll::{DoublyLinkedList, Item};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/iterator.rs:257:6
[INFO] [stdout]     |
[INFO] [stdout] 257 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused imports: `DoublyLinkedList` and `Item`
[INFO] [stdout]  --> src/ds/mod.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub use self::dll::{DoublyLinkedList, Item};
[INFO] [stdout]   |                     ^^^^^^^^^^^^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![cfg_attr(test, deny(warnings))]
[INFO] [stdout]   |                        ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unnecessary trailing semicolon
[INFO] [stdout]    --> src/iterator.rs:257:6
[INFO] [stdout]     |
[INFO] [stdout] 257 |     };
[INFO] [stdout]     |      ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(redundant_semicolons)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/config.rs:344:22
[INFO] [stdout]     |
[INFO] [stdout] 344 |                 file.try_lock_shared()
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `fs2::FileExt::try_lock_shared(...)` to keep using the current method
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:5:9
[INFO] [stdout]     |
[INFO] [stdout] 5   | #![deny(future_incompatible)]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[deny(unstable_name_collisions)]` implied by `#[deny(future_incompatible)]`
[INFO] [stdout] help: add `#![feature(file_lock)]` to the crate attributes to enable `File::try_lock_shared`
[INFO] [stdout]    --> src/lib.rs:10:1
[INFO] [stdout]     |
[INFO] [stdout] 10  + #![feature(file_lock)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: a method with this name may be added to the standard library in the future
[INFO] [stdout]    --> src/config.rs:344:22
[INFO] [stdout]     |
[INFO] [stdout] 344 |                 file.try_lock_shared()
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]     = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]     = help: call with fully qualified syntax `fs2::FileExt::try_lock_shared(...)` to keep using the current method
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:5:9
[INFO] [stdout]     |
[INFO] [stdout] 5   | #![deny(future_incompatible)]
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[deny(unstable_name_collisions)]` implied by `#[deny(future_incompatible)]`
[INFO] [stdout] help: add `#![feature(file_lock)]` to the crate attributes to enable `File::try_lock_shared`
[INFO] [stdout]    --> src/lib.rs:10:1
[INFO] [stdout]     |
[INFO] [stdout] 10  + #![feature(file_lock)]
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicU64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/iobuf.rs:899:31
[INFO] [stdout]     |
[INFO] [stdout] 899 |         let res = self.header.compare_and_swap(old, new, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicBool::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lazy.rs:57:28
[INFO] [stdout]    |
[INFO] [stdout] 57 |         while self.init_mu.compare_and_swap(false, true, SeqCst) {}
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicU64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/iobuf.rs:899:31
[INFO] [stdout]     |
[INFO] [stdout] 899 |         let res = self.header.compare_and_swap(old, new, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(deprecated)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicBool::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]   --> src/lazy.rs:57:28
[INFO] [stdout]    |
[INFO] [stdout] 57 |         while self.init_mu.compare_and_swap(false, true, SeqCst) {}
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/result.rs:127:28
[INFO] [stdout]     |
[INFO] [stdout] 127 |             Io(ref e) => e.description(),
[INFO] [stdout]     |                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]    --> src/result.rs:127:28
[INFO] [stdout]     |
[INFO] [stdout] 127 |             Io(ref e) => e.description(),
[INFO] [stdout]     |                            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated method `std::sync::atomic::AtomicI64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/lib.rs:291:31
[INFO] [stdout]     |
[INFO] [stdout] 291 |         let last = atomic_lsn.compare_and_swap(current, to, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: use of deprecated method `std::sync::atomic::AtomicI64::compare_and_swap`: Use `compare_exchange` or `compare_exchange_weak` instead
[INFO] [stdout]    --> src/lib.rs:291:31
[INFO] [stdout]     |
[INFO] [stdout] 291 |         let last = atomic_lsn.compare_and_swap(current, to, SeqCst);
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/config.rs:448:9
[INFO] [stdout]     |
[INFO] [stdout] 448 |         buf.split_off(len - 4);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 448 |         let _ = buf.split_off(len - 4);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/snapshot.rs:218:5
[INFO] [stdout]     |
[INFO] [stdout] 218 |     buf.split_off(len - 12);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 218 |     let _ = buf.split_off(len - 12);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pagecache` (lib) due to 1 previous error; 8 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/config.rs:448:9
[INFO] [stdout]     |
[INFO] [stdout] 448 |         buf.split_off(len - 4);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout]     = note: `#[deny(unused_must_use)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 448 |         let _ = buf.split_off(len - 4);
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unused return value of `Vec::<T, A>::split_off` that must be used
[INFO] [stdout]    --> src/snapshot.rs:218:5
[INFO] [stdout]     |
[INFO] [stdout] 218 |     buf.split_off(len - 12);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: use `.truncate()` if you don't need the other half
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 218 |     let _ = buf.split_off(len - 12);
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pagecache` (lib test) due to 9 previous errors
[INFO] running `Command { std: "docker" "inspect" "f84b0e96008ac58d024990a0c11d1719ebf350a442d3da40c780113f64dcc9bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f84b0e96008ac58d024990a0c11d1719ebf350a442d3da40c780113f64dcc9bf", kill_on_drop: false }`
[INFO] [stdout] f84b0e96008ac58d024990a0c11d1719ebf350a442d3da40c780113f64dcc9bf
