[INFO] fetching crate untyped-arena 0.1.1...
[INFO] testing untyped-arena-0.1.1 against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145330-1
[INFO] extracting crate untyped-arena 0.1.1 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate untyped-arena 0.1.1
[INFO] finished tweaking crates.io crate untyped-arena 0.1.1
[INFO] tweaked toml for crates.io crate untyped-arena 0.1.1 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate untyped-arena 0.1.1 on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate untyped-arena 0.1.1 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2615e7be9040ea8c65476bf30d6233906d60e07b604ce569df9f808794f0c97c
[INFO] running `Command { std: "docker" "start" "-a" "2615e7be9040ea8c65476bf30d6233906d60e07b604ce569df9f808794f0c97c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2615e7be9040ea8c65476bf30d6233906d60e07b604ce569df9f808794f0c97c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2615e7be9040ea8c65476bf30d6233906d60e07b604ce569df9f808794f0c97c", kill_on_drop: false }`
[INFO] [stdout] 2615e7be9040ea8c65476bf30d6233906d60e07b604ce569df9f808794f0c97c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 84f56406f0cbc3e672107e1904ec7329d0f166f86fea57377162f3db7250355f
[INFO] running `Command { std: "docker" "start" "-a" "84f56406f0cbc3e672107e1904ec7329d0f166f86fea57377162f3db7250355f", kill_on_drop: false }`
[INFO] [stderr]    Compiling untyped-arena v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "84f56406f0cbc3e672107e1904ec7329d0f166f86fea57377162f3db7250355f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84f56406f0cbc3e672107e1904ec7329d0f166f86fea57377162f3db7250355f", kill_on_drop: false }`
[INFO] [stdout] 84f56406f0cbc3e672107e1904ec7329d0f166f86fea57377162f3db7250355f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 013aa31d799da8e72bedfd526a32a7a1f57727b5b499107f21526c22f7630f03
[INFO] running `Command { std: "docker" "start" "-a" "013aa31d799da8e72bedfd526a32a7a1f57727b5b499107f21526c22f7630f03", kill_on_drop: false }`
[INFO] [stderr]    Compiling untyped-arena v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/dropck_tests.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut a = arena.alloc(A::default());
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/dropck_tests.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mut b = arena.alloc(A::default());
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0597]: `arena` does not live long enough
[INFO] [stdout]   --> examples/dropck_tests.rs:29:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let arena = Arena::new();
[INFO] [stdout]    |         ----- binding `arena` declared here
[INFO] [stdout] 29 |     let mut a = arena.alloc(A::default());
[INFO] [stdout]    |                 ^^^^^ borrowed value does not live long enough
[INFO] [stdout] ...
[INFO] [stdout] 32 | }
[INFO] [stdout]    | -
[INFO] [stdout]    | |
[INFO] [stdout]    | `arena` dropped here while still borrowed
[INFO] [stdout]    | borrow might be used here, when `arena` is dropped and runs the `Drop` code for type `Arena`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0597`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `untyped-arena` (example "dropck_tests") due to 1 previous error; 2 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "013aa31d799da8e72bedfd526a32a7a1f57727b5b499107f21526c22f7630f03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "013aa31d799da8e72bedfd526a32a7a1f57727b5b499107f21526c22f7630f03", kill_on_drop: false }`
[INFO] [stdout] 013aa31d799da8e72bedfd526a32a7a1f57727b5b499107f21526c22f7630f03