[INFO] fetching crate simulation 0.0.2-alpha.0...
[INFO] testing simulation-0.0.2-alpha.0 against 1.55.0 for beta-1.56-2
[INFO] extracting crate simulation 0.0.2-alpha.0 into /workspace/builds/worker-113/source
[INFO] validating manifest of crates.io crate simulation 0.0.2-alpha.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-113/source/Cargo.toml
[INFO] crate crates.io crate simulation 0.0.2-alpha.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_pcg v0.2.0
[INFO] [stderr]   Downloaded pin-convert v0.1.0
[INFO] [stderr]   Downloaded tokio-test v0.2.0-alpha.6
[INFO] [stderr]   Downloaded async-trait v0.1.16
[INFO] [stderr]   Downloaded tower-reconnect v0.3.0-alpha.2
[INFO] [stderr]   Downloaded tonic v0.1.0-alpha.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8437bde5abccb30146aed6acf5943bff2a00cf2c10b972f4e4847262d7bd2d83
[INFO] running `Command { std: "docker" "start" "-a" "8437bde5abccb30146aed6acf5943bff2a00cf2c10b972f4e4847262d7bd2d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8437bde5abccb30146aed6acf5943bff2a00cf2c10b972f4e4847262d7bd2d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8437bde5abccb30146aed6acf5943bff2a00cf2c10b972f4e4847262d7bd2d83", kill_on_drop: false }`
[INFO] [stdout] 8437bde5abccb30146aed6acf5943bff2a00cf2c10b972f4e4847262d7bd2d83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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=warn" "-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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cb71d20cf0fb9d619fa5352e75e336d9b7a62563988c515dd37e19f48221928b
[INFO] running `Command { std: "docker" "start" "-a" "cb71d20cf0fb9d619fa5352e75e336d9b7a62563988c515dd37e19f48221928b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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
[INFO] [stderr]    Compiling semver-parser v0.7.0
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[INFO] [stderr]    Compiling arrayvec v0.4.12
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[INFO] [stderr]    Compiling nodrop v0.1.14
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[INFO] [stderr]    Compiling tokio-macros v0.2.0-alpha.6
[INFO] [stderr]    Compiling async-trait v0.1.16
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-join-macro-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling tracing v0.1.9
[INFO] [stderr]    Compiling pin-project v0.4.5
[INFO] [stderr]    Compiling tokio-io v0.2.0-alpha.6
[INFO] [stderr]    Compiling futures-util-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling tokio-codec v0.2.0-alpha.6
[INFO] [stderr]    Compiling tokio-sync v0.2.0-alpha.6
[INFO] [stderr]    Compiling futures-executor-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling futures-preview v0.3.0-alpha.19
[INFO] [stderr]    Compiling tokio-executor v0.2.0-alpha.6
[INFO] [stderr]    Compiling tokio-fs 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 v0.2.0-alpha.6
[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: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 05s
[INFO] running `Command { std: "docker" "inspect" "cb71d20cf0fb9d619fa5352e75e336d9b7a62563988c515dd37e19f48221928b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb71d20cf0fb9d619fa5352e75e336d9b7a62563988c515dd37e19f48221928b", kill_on_drop: false }`
[INFO] [stdout] cb71d20cf0fb9d619fa5352e75e336d9b7a62563988c515dd37e19f48221928b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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=warn" "-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" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] afad82e318643ea378f4021948247206fbfdcad1eac02c8eabbb207c6d2ea98b
[INFO] running `Command { std: "docker" "start" "-a" "afad82e318643ea378f4021948247206fbfdcad1eac02c8eabbb207c6d2ea98b", kill_on_drop: false }`
[INFO] [stderr]    Compiling tower-service v0.3.0-alpha.2
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling tower-layer v0.3.0-alpha.2
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling itoa v0.4.4
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]    Compiling either v1.5.3
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling futures v0.1.29
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling time v0.1.42
[INFO] [stderr]    Compiling want v0.3.0
[INFO] [stderr]    Compiling base64 v0.10.1
[INFO] [stderr]    Compiling string v0.2.1
[INFO] [stderr]    Compiling async-stream-impl v0.1.1
[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: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling http v0.1.19
[INFO] [stderr]    Compiling itertools v0.8.0
[INFO] [stderr]    Compiling tower-make v0.3.0-alpha.2a
[INFO] [stderr]    Compiling tower-discover v0.3.0-alpha.2
[INFO] [stderr]    Compiling tower-limit v0.3.0-alpha.2
[INFO] [stderr]    Compiling tower-timeout v0.3.0-alpha.2
[INFO] [stderr]    Compiling tower-retry v0.3.0-alpha.2
[INFO] [stderr]    Compiling tower-util v0.3.0-alpha.2
[INFO] [stderr]    Compiling tower-buffer v0.3.0-alpha.2
[INFO] [stderr]    Compiling tower-load-shed v0.3.0-alpha.2
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling tower-service v0.2.0
[INFO] [stderr]    Compiling tower-reconnect v0.3.0-alpha.2
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling tower-load v0.3.0-alpha.2
[INFO] [stderr]    Compiling async-stream v0.1.2
[INFO] [stderr]    Compiling tower v0.3.0-alpha.2
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling http-body v0.2.0-alpha.3
[INFO] [stderr]    Compiling h2 v0.2.0-alpha.3
[INFO] [stderr]    Compiling tower-balance v0.3.0-alpha.2
[INFO] [stderr]    Compiling backtrace v0.3.40
[INFO] [stderr]    Compiling failure v0.1.6
[INFO] [stderr]    Compiling hyper v0.13.0-alpha.4
[INFO] [stderr]    Compiling prost-derive v0.5.0
[INFO] [stderr]    Compiling prost v0.5.0
[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: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 30.45s
[INFO] running `Command { std: "docker" "inspect" "afad82e318643ea378f4021948247206fbfdcad1eac02c8eabbb207c6d2ea98b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "afad82e318643ea378f4021948247206fbfdcad1eac02c8eabbb207c6d2ea98b", kill_on_drop: false }`
[INFO] [stdout] afad82e318643ea378f4021948247206fbfdcad1eac02c8eabbb207c6d2ea98b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-113/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=warn" "-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" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e38145fadb6b4eb84111bb6ba00ade58c7b3384abfd34eca22b9f3d594776c18
[INFO] running `Command { std: "docker" "start" "-a" "e38145fadb6b4eb84111bb6ba00ade58c7b3384abfd34eca22b9f3d594776c18", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]    --> src/deterministic/network/stream.rs:141:13
[INFO] [stderr]     |
[INFO] [stderr] 141 |             std::mem::replace(&mut lock.delay, new);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: `simulation` (lib) generated 1 warning
[INFO] [stderr] warning: `simulation` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.31s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/simulation-4173e12a23e684ac)
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test deterministic::network::pipe::tests::bounded_pipe ... ok
[INFO] [stdout] test deterministic::network::pipe::tests::shutdown_pipe ... ok
[INFO] [stdout] test deterministic::network::stream::tests::test_client_disconnect_wake ... ok
[INFO] [stdout] test deterministic::tests::ordering ... ok
[INFO] [stdout] test deterministic::tests::globals ... ok
[INFO] [stdout] test deterministic::network::stream::tests::test_disconnect ... ok
[INFO] [stdout] test deterministic::tests::delays ... ok
[INFO] [stdout] test deterministic::network::stream::tests::test_server_disconnect_wake ... ok
[INFO] [stdout] test deterministic::network::tests::bind_and_connect ... ok
[INFO] [stderr]      Running tests/tonic.rs (/opt/rustwide/target/debug/deps/tonic-621b80deb4501a86)
[INFO] [stdout] test deterministic::network::stream::tests::test_ping_pong ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.62s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests simulation
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - (line 39) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 3.63s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e38145fadb6b4eb84111bb6ba00ade58c7b3384abfd34eca22b9f3d594776c18", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e38145fadb6b4eb84111bb6ba00ade58c7b3384abfd34eca22b9f3d594776c18", kill_on_drop: false }`
[INFO] [stdout] e38145fadb6b4eb84111bb6ba00ade58c7b3384abfd34eca22b9f3d594776c18