[INFO] updating cached repository https://github.com/ctsrc/persistence
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8ddd31630478932df406e41d9cfdbdaf0e882736
[INFO] checking ctsrc/persistence against master#30ca215b4e38b32aa7abdd635c5e2d56f5724494 for pr-66037
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fctsrc%2Fpersistence" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ctsrc/persistence on toolchain 30ca215b4e38b32aa7abdd635c5e2d56f5724494
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ctsrc/persistence
[INFO] finished tweaking git repo https://github.com/ctsrc/persistence
[INFO] tweaked toml for git repo https://github.com/ctsrc/persistence written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/ctsrc/persistence already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 34bd5f3d8144088e3237e83c1e8bbcc2fc11d39876c00e7d65618a4c2e2c7ba9
[INFO] running `"docker" "start" "-a" "34bd5f3d8144088e3237e83c1e8bbcc2fc11d39876c00e7d65618a4c2e2c7ba9"`
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking persistence v0.0.5 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:258:9
[INFO] [stderr]     |
[INFO] [stderr] 258 |     let mut mm = unsafe { MmapMut::map_mut(&file)? };
[INFO] [stderr]     |         ----^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `file`
[INFO] [stderr]    --> src/lib.rs:146:3
[INFO] [stderr]     |
[INFO] [stderr] 146 |   file: File,
[INFO] [stderr]     |   ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `mm`
[INFO] [stderr]    --> src/lib.rs:147:3
[INFO] [stderr]     |
[INFO] [stderr] 147 |   mm: MmapMut,
[INFO] [stderr]     |   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/lib.rs:400:20
[INFO] [stderr]     |
[INFO] [stderr] 400 |     assert!(mv_err.description().ends_with("Magic bytes mismatch."));
[INFO] [stderr]     |                    ^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/lib.rs:418:20
[INFO] [stderr]     |
[INFO] [stderr] 418 |     assert!(mv_err.description().contains("shorter than the expected header size"));
[INFO] [stderr]     |                    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/lib.rs:436:20
[INFO] [stderr]     |
[INFO] [stderr] 436 |     assert!(mv_err.description().contains("not an integer multiple of the size of the data type"));
[INFO] [stderr]     |                    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/lib.rs:456:20
[INFO] [stderr]     |
[INFO] [stderr] 456 |     assert!(mv_err.description().ends_with("Endianness-marker invalid."));
[INFO] [stderr]     |                    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]    --> src/lib.rs:482:20
[INFO] [stderr]     |
[INFO] [stderr] 482 |     assert!(mv_err.description().ends_with("Wrong endianness."));
[INFO] [stderr]     |                    ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:258:9
[INFO] [stderr]     |
[INFO] [stderr] 258 |     let mut mm = unsafe { MmapMut::map_mut(&file)? };
[INFO] [stderr]     |         ----^^
[INFO] [stderr]     |         |
[INFO] [stderr]     |         help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `file`
[INFO] [stderr]    --> src/lib.rs:146:3
[INFO] [stderr]     |
[INFO] [stderr] 146 |   file: File,
[INFO] [stderr]     |   ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `mm`
[INFO] [stderr]    --> src/lib.rs:147:3
[INFO] [stderr]     |
[INFO] [stderr] 147 |   mm: MmapMut,
[INFO] [stderr]     |   ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `"docker" "inspect" "34bd5f3d8144088e3237e83c1e8bbcc2fc11d39876c00e7d65618a4c2e2c7ba9"`
[INFO] running `"docker" "rm" "-f" "34bd5f3d8144088e3237e83c1e8bbcc2fc11d39876c00e7d65618a4c2e2c7ba9"`
[INFO] [stdout] 34bd5f3d8144088e3237e83c1e8bbcc2fc11d39876c00e7d65618a4c2e2c7ba9