[INFO] cloning repository https://github.com/zesterer/flume
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zesterer/flume" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Fflume", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Fflume'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f1e77e4489496952f0697354109e90542d0f03a7
[INFO] checking zesterer/flume against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzesterer%2Fflume" "/workspace/builds/worker-56/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-56/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zesterer/flume on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zesterer/flume
[INFO] finished tweaking git repo https://github.com/zesterer/flume
[INFO] tweaked toml for git repo https://github.com/zesterer/flume written to /workspace/builds/worker-56/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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 nanorand v0.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2aa71ffe64fed407ab04309656ec944b2584d877b3697cc45b595bf5b1b04038
[INFO] running `Command { std: "docker" "start" "-a" "2aa71ffe64fed407ab04309656ec944b2584d877b3697cc45b595bf5b1b04038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2aa71ffe64fed407ab04309656ec944b2584d877b3697cc45b595bf5b1b04038", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2aa71ffe64fed407ab04309656ec944b2584d877b3697cc45b595bf5b1b04038", kill_on_drop: false }`
[INFO] [stdout] 2aa71ffe64fed407ab04309656ec944b2584d877b3697cc45b595bf5b1b04038
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-56/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a55b9d1a8e4a0a098ebddbd4a44f837d5f1f182a7972616ee020df98412cadf
[INFO] running `Command { std: "docker" "start" "-a" "4a55b9d1a8e4a0a098ebddbd4a44f837d5f1f182a7972616ee020df98412cadf", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] note: Switching to Edition 2021 will enable the use of the version 2 feature resolver in Cargo.
[INFO] [stderr] This may cause some dependencies to be built with fewer features enabled than previously.
[INFO] [stderr] More information about the resolver changes may be found at https://doc.rust-lang.org/nightly/edition-guide/rust-2021/default-cargo-resolver.html
[INFO] [stderr] When building the following dependencies, the given features will no longer be used:
[INFO] [stderr] 
[INFO] [stderr]   futures-core v0.3.16: alloc, default, std
[INFO] [stderr]   futures-sink v0.3.16: alloc, std
[INFO] [stderr]   getrandom v0.2.3: std
[INFO] [stderr]   libc v0.2.100: default, std
[INFO] [stderr]   syn v1.0.75 (as host dependency): visit
[INFO] [stderr] 
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling libc v0.2.100
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling futures-core v0.3.16
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]     Checking futures-io v0.3.16
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling serde v1.0.129
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking slab v0.4.4
[INFO] [stderr]     Checking fastrand v1.5.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking futures-sink v0.3.16
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]     Checking itoa v0.4.8
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking async-lock v2.4.0
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.7
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[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking getrandom v0.2.3
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[INFO] [stderr]    Compiling rustc_version v0.4.0
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[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking nanorand v0.6.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking rand_chacha v0.3.1
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[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking blocking v1.0.2
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[INFO] [stderr]     Checking criterion-plot v0.4.4
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[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]     Checking polling v2.1.0
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[INFO] [stderr]     Checking async-process v1.2.0
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking flume v0.10.8 (/tmp/fixit)
[INFO] [stderr]    Migrating src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stderr]    Migrating tests/async.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/tick.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/ready.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/thread_locals.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/list.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/select_macro.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/golang.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/select.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/never.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/iter.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/stream.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/mpsc.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/async.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/same_channel.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/simple.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/zero.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/select.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/after.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/method_sharing.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/array.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating tests/basic.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating benches/basic.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/perf.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed tests/list.rs (1 fix)
[INFO] [stderr]        Fixed tests/stream.rs (1 fix)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> tests/stream.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         tx.send(42);
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed tests/mpsc.rs (12 fixes)
[INFO] [stderr]        Fixed tests/zero.rs (1 fix)
[INFO] [stderr]        Fixed tests/array.rs (1 fix)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 45.38s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.75
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]    Compiling ctor v0.1.20
[INFO] [stderr]    Compiling futures-macro v0.3.16
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling async-attributes v1.1.2
[INFO] [stderr]    Compiling serde_derive v1.0.129
[INFO] [stderr]     Checking value-bag v1.0.0-alpha.7
[INFO] [stderr]     Checking futures-util v0.3.16
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking polling v2.1.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-io v1.6.0
[INFO] [stderr]     Checking async-global-executor v2.0.2
[INFO] [stderr]     Checking async-process v1.2.0
[INFO] [stderr]     Checking pin-project v1.0.8
[INFO] [stderr]     Checking async-std v1.9.0
[INFO] [stderr]     Checking flume v0.10.8 (/tmp/fixit)
[INFO] [stderr]     Checking futures-executor v0.3.16
[INFO] [stderr]     Checking futures v0.3.16
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> tests/stream.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |         tx.send(42);
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 43.82s
[INFO] running `Command { std: "docker" "inspect" "4a55b9d1a8e4a0a098ebddbd4a44f837d5f1f182a7972616ee020df98412cadf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a55b9d1a8e4a0a098ebddbd4a44f837d5f1f182a7972616ee020df98412cadf", kill_on_drop: false }`
[INFO] [stdout] 4a55b9d1a8e4a0a098ebddbd4a44f837d5f1f182a7972616ee020df98412cadf