[INFO] fetching crate simulation 0.0.2-alpha.0...
[INFO] building simulation-0.0.2-alpha.0 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate simulation 0.0.2-alpha.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate simulation 0.0.2-alpha.0
[INFO] finished tweaking crates.io crate simulation 0.0.2-alpha.0
[INFO] tweaked toml for crates.io crate simulation 0.0.2-alpha.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate simulation 0.0.2-alpha.0 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate simulation 0.0.2-alpha.0 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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 80b8a3e05cef73c552fbf3d4c9805473eb928df8352a333ee9846f46b78e23e3
[INFO] running `Command { std: "docker" "start" "-a" "80b8a3e05cef73c552fbf3d4c9805473eb928df8352a333ee9846f46b78e23e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80b8a3e05cef73c552fbf3d4c9805473eb928df8352a333ee9846f46b78e23e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80b8a3e05cef73c552fbf3d4c9805473eb928df8352a333ee9846f46b78e23e3", kill_on_drop: false }`
[INFO] [stdout] 80b8a3e05cef73c552fbf3d4c9805473eb928df8352a333ee9846f46b78e23e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c00da1bb227e8abde0da293904942b8dc17c8dd88a399048d6e7d09b484ea93
[INFO] running `Command { std: "docker" "start" "-a" "7c00da1bb227e8abde0da293904942b8dc17c8dd88a399048d6e7d09b484ea93", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.5
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[INFO] [stderr]    Compiling tokio-executor v0.2.0-alpha.6
[INFO] [stderr]    Compiling tokio-timer v0.3.0-alpha.6
[INFO] [stderr]    Compiling tokio-net v0.2.0-alpha.6
[INFO] [stderr]    Compiling tokio-fs v0.2.0-alpha.6
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[INFO] [stderr]    Compiling tokio-test v0.2.0-alpha.6
[INFO] [stderr]    Compiling simulation v0.0.2-alpha.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/deterministic/network/stream.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |             std::mem::replace(&mut lock.delay, new);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 141 |             let _ = std::mem::replace(&mut lock.delay, new);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.27s
[INFO] running `Command { std: "docker" "inspect" "7c00da1bb227e8abde0da293904942b8dc17c8dd88a399048d6e7d09b484ea93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c00da1bb227e8abde0da293904942b8dc17c8dd88a399048d6e7d09b484ea93", kill_on_drop: false }`
[INFO] [stdout] 7c00da1bb227e8abde0da293904942b8dc17c8dd88a399048d6e7d09b484ea93
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 799ebee1ba304a3a23abafa9e5ecdf51395ed0b11cea50136aa357652e1db801
[INFO] running `Command { std: "docker" "start" "-a" "799ebee1ba304a3a23abafa9e5ecdf51395ed0b11cea50136aa357652e1db801", kill_on_drop: false }`
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[INFO] [stderr]    Compiling unicode-xid v0.1.0
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[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/deterministic/network/stream.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |             std::mem::replace(&mut lock.delay, new);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 141 |             let _ = std::mem::replace(&mut lock.delay, new);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling tower v0.3.0-alpha.2
[INFO] [stderr]    Compiling async-stream v0.1.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling tower-balance v0.3.0-alpha.2
[INFO] [stderr]    Compiling tower-service v0.2.0
[INFO] [stderr]    Compiling http-body v0.2.0-alpha.3
[INFO] [stderr]    Compiling h2 v0.2.0-alpha.3
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[INFO] [stderr]    Compiling tonic v0.1.0-alpha.3
[INFO] [stderr]    Compiling simulation v0.0.2-alpha.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/deterministic/network/stream.rs:141:13
[INFO] [stdout]     |
[INFO] [stdout] 141 |             std::mem::replace(&mut lock.delay, new);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 141 |             let _ = std::mem::replace(&mut lock.delay, new);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 18.66s
[INFO] running `Command { std: "docker" "inspect" "799ebee1ba304a3a23abafa9e5ecdf51395ed0b11cea50136aa357652e1db801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "799ebee1ba304a3a23abafa9e5ecdf51395ed0b11cea50136aa357652e1db801", kill_on_drop: false }`
[INFO] [stdout] 799ebee1ba304a3a23abafa9e5ecdf51395ed0b11cea50136aa357652e1db801
