[INFO] fetching crate rast 0.1.0-alpha.0...
[INFO] checking rast-0.1.0-alpha.0 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate rast 0.1.0-alpha.0 into /workspace/builds/worker-68/source
[INFO] validating manifest of crates.io crate rast 0.1.0-alpha.0 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rast 0.1.0-alpha.0
[INFO] finished tweaking crates.io crate rast 0.1.0-alpha.0
[INFO] tweaked toml for crates.io crate rast 0.1.0-alpha.0 written to /workspace/builds/worker-68/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded extreme v666.666.666666
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fcb7576fc4cb48a53c31f78e536485c3c544429cf2f438c1809d0e3107bcfdd
[INFO] running `Command { std: "docker" "start" "-a" "8fcb7576fc4cb48a53c31f78e536485c3c544429cf2f438c1809d0e3107bcfdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fcb7576fc4cb48a53c31f78e536485c3c544429cf2f438c1809d0e3107bcfdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fcb7576fc4cb48a53c31f78e536485c3c544429cf2f438c1809d0e3107bcfdd", kill_on_drop: false }`
[INFO] [stdout] 8fcb7576fc4cb48a53c31f78e536485c3c544429cf2f438c1809d0e3107bcfdd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-68/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" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f83baf6a773a4c2f4034a7e22582b6f5d7370e7ae0472c51ebf7913c7bdbc6d
[INFO] running `Command { std: "docker" "start" "-a" "7f83baf6a773a4c2f4034a7e22582b6f5d7370e7ae0472c51ebf7913c7bdbc6d", kill_on_drop: false }`
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking extreme v666.666.666666
[INFO] [stderr]     Checking rast v0.1.0-alpha.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stdout] warning: field is never read: `worker_idx`
[INFO] [stdout]   --> src/nemesis/nemesis.rs:42:3
[INFO] [stdout]    |
[INFO] [stdout] 42 |   worker_idx: u64,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `start`
[INFO] [stdout]   --> src/nemesis/nemesis.rs:43:3
[INFO] [stdout]    |
[INFO] [stdout] 43 |   start: Instant,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `req`
[INFO] [stdout]   --> src/nemesis/nemesis.rs:44:3
[INFO] [stdout]    |
[INFO] [stdout] 44 |   req: ReadReq,
[INFO] [stdout]    |   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `finish`
[INFO] [stdout]   --> src/nemesis/nemesis.rs:46:3
[INFO] [stdout]    |
[INFO] [stdout] 46 |   finish: Instant,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `worker_idx`
[INFO] [stdout]   --> src/nemesis/nemesis.rs:51:3
[INFO] [stdout]    |
[INFO] [stdout] 51 |   worker_idx: u64,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `start`
[INFO] [stdout]   --> src/nemesis/nemesis.rs:52:3
[INFO] [stdout]    |
[INFO] [stdout] 52 |   start: Instant,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `finish`
[INFO] [stdout]   --> src/nemesis/nemesis.rs:55:3
[INFO] [stdout]    |
[INFO] [stdout] 55 |   finish: Instant,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message contains an unused formatting placeholder
[INFO] [stdout]   --> src/testutil/noopfuture.rs:45:54
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Poll::Pending => panic!("unexpectedly not ready: {:?}"),
[INFO] [stdout]    |                                                      ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]    = note: this message is not used as a format string when given without arguments, but will be in Rust 2021
[INFO] [stdout] help: add the missing argument
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Poll::Pending => panic!("unexpectedly not ready: {:?}", ...),
[INFO] [stdout]    |                                                           +++++
[INFO] [stdout] help: or add a "{}" format string to use the message literally
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Poll::Pending => panic!("{}", "unexpectedly not ready: {:?}"),
[INFO] [stdout]    |                             +++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 28.16s
[INFO] running `Command { std: "docker" "inspect" "7f83baf6a773a4c2f4034a7e22582b6f5d7370e7ae0472c51ebf7913c7bdbc6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f83baf6a773a4c2f4034a7e22582b6f5d7370e7ae0472c51ebf7913c7bdbc6d", kill_on_drop: false }`
[INFO] [stdout] 7f83baf6a773a4c2f4034a7e22582b6f5d7370e7ae0472c51ebf7913c7bdbc6d