[INFO] fetching crate switchboard-v2 0.4.0...
[INFO] checking switchboard-v2-0.4.0 against try#45a41ffb423036390396cec6d4e16c04033f4d02 for pr-116745
[INFO] extracting crate switchboard-v2 0.4.0 into /workspace/builds/worker-6-tc2/source
[INFO] validating manifest of crates.io crate switchboard-v2 0.4.0 on toolchain 45a41ffb423036390396cec6d4e16c04033f4d02
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+45a41ffb423036390396cec6d4e16c04033f4d02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate switchboard-v2 0.4.0
[INFO] finished tweaking crates.io crate switchboard-v2 0.4.0
[INFO] tweaked toml for crates.io crate switchboard-v2 0.4.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+45a41ffb423036390396cec6d4e16c04033f4d02" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+45a41ffb423036390396cec6d4e16c04033f4d02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:023092b8bfa974c7f3e45c5ce651cc8dd3afd5e76915d5995b8dacd3032bf956" "/opt/rustwide/cargo-home/bin/cargo" "+45a41ffb423036390396cec6d4e16c04033f4d02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fddf446465cbf5dcb92ad234839f3c3d413288fb24bc0ca961d0ab6578b2b714
[INFO] running `Command { std: "docker" "start" "-a" "fddf446465cbf5dcb92ad234839f3c3d413288fb24bc0ca961d0ab6578b2b714", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fddf446465cbf5dcb92ad234839f3c3d413288fb24bc0ca961d0ab6578b2b714", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fddf446465cbf5dcb92ad234839f3c3d413288fb24bc0ca961d0ab6578b2b714", kill_on_drop: false }`
[INFO] [stdout] fddf446465cbf5dcb92ad234839f3c3d413288fb24bc0ca961d0ab6578b2b714
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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@sha256:023092b8bfa974c7f3e45c5ce651cc8dd3afd5e76915d5995b8dacd3032bf956" "/opt/rustwide/cargo-home/bin/cargo" "+45a41ffb423036390396cec6d4e16c04033f4d02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 95b550c09275f8a87e8355e47ee821f43bd4767adf8c15dfa496a7eea62956a9
[INFO] running `Command { std: "docker" "start" "-a" "95b550c09275f8a87e8355e47ee821f43bd4767adf8c15dfa496a7eea62956a9", kill_on_drop: false }`
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[INFO] [stdout] warning: the type `history_buffer::AggregatorHistoryBuffer<'_>` does not permit zero-initialization
[INFO] [stdout]   --> src/history_buffer.rs:97:22
[INFO] [stdout]    |
[INFO] [stdout] 97 |             unsafe { std::mem::zeroed() }
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |                      |
[INFO] [stdout]    |                      this code causes undefined behavior when executed
[INFO] [stdout]    |                      help: use `MaybeUninit<T>` instead, and only call `assume_init` after initialization is done
[INFO] [stdout]    |
[INFO] [stdout] note: `std::ptr::NonNull<[history_buffer::AggregatorHistoryRow]>` must be non-null (in this struct field)
[INFO] [stdout]   --> src/history_buffer.rs:25:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub rows: Ref<'a, [AggregatorHistoryRow]>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(invalid_value)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.73s
[INFO] running `Command { std: "docker" "inspect" "95b550c09275f8a87e8355e47ee821f43bd4767adf8c15dfa496a7eea62956a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95b550c09275f8a87e8355e47ee821f43bd4767adf8c15dfa496a7eea62956a9", kill_on_drop: false }`
[INFO] [stdout] 95b550c09275f8a87e8355e47ee821f43bd4767adf8c15dfa496a7eea62956a9