[INFO] cloning repository https://github.com/evopen/async-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/evopen/async-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fevopen%2Fasync-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fevopen%2Fasync-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b11e4dff37c04b770cbc4b27fce8693002a045b9
[INFO] checking evopen/async-playground against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fevopen%2Fasync-playground" "/workspace/builds/worker-95/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-95/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/evopen/async-playground 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/evopen/async-playground
[INFO] finished tweaking git repo https://github.com/evopen/async-playground
[INFO] tweaked toml for git repo https://github.com/evopen/async-playground written to /workspace/builds/worker-95/source/Cargo.toml
[INFO] crate git repo https://github.com/evopen/async-playground already has a lockfile, it will not be regenerated
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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] 49acaf99c7c19147d1ad54408f624fa8ecbfc7bcce6f0a14c940b3a6b30a0119
[INFO] running `Command { std: "docker" "start" "-a" "49acaf99c7c19147d1ad54408f624fa8ecbfc7bcce6f0a14c940b3a6b30a0119", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49acaf99c7c19147d1ad54408f624fa8ecbfc7bcce6f0a14c940b3a6b30a0119", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49acaf99c7c19147d1ad54408f624fa8ecbfc7bcce6f0a14c940b3a6b30a0119", kill_on_drop: false }`
[INFO] [stdout] 49acaf99c7c19147d1ad54408f624fa8ecbfc7bcce6f0a14c940b3a6b30a0119
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-95/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] 3b815968a5a4841e804882b6c69d5b4d121293c3971e86dcb5862ed1e0d6d728
[INFO] running `Command { std: "docker" "start" "-a" "3b815968a5a4841e804882b6c69d5b4d121293c3971e86dcb5862ed1e0d6d728", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[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-channel v0.3.8: default
[INFO] [stderr]   libc v0.2.80: align
[INFO] [stderr]   syn v1.0.48 (as host dependency): visit
[INFO] [stderr] 
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.1
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[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]     Checking futures-core v0.3.8
[INFO] [stderr]    Compiling unicode-xid v0.2.1
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[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking cfg-if v1.0.0
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[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling const_fn v0.4.3
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[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
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[INFO] [stderr]     Checking tinyvec_macros v0.1.0
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[INFO] [stderr]    Compiling crossbeam-utils v0.8.0
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[INFO] [stderr]     Checking sha-1 v0.9.2
[INFO] [stderr]     Checking tungstenite v0.11.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.1
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling tokio-macros v0.3.1
[INFO] [stderr]     Checking pin-project v1.0.1
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking futures-executor v0.3.8
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[INFO] [stderr]     Checking async-tungstenite v0.10.0
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Checking async-playground v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating src/bin/client.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/bin/server.rs from 2018 edition to 2021
[INFO] [stderr]        Fixed src/bin/client.rs (4 fixes)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/bin/client.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     loop {
[INFO] [stdout] 16 | |         sleep(Duration::from_secs(1)).await;
[INFO] [stdout] 17 | |         write_stream
[INFO] [stdout] 18 | |             .send(Message::Text("do you know".into()))
[INFO] [stdout] ...  |
[INFO] [stdout] 21 | |         println!("sent");
[INFO] [stdout] 22 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 23 | 
[INFO] [stdout] 24 |       println!("handle outgoing finished");
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/bin/client.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     loop {
[INFO] [stdout] 16 | |         sleep(Duration::from_secs(1)).await;
[INFO] [stdout] 17 | |         write_stream
[INFO] [stdout] 18 | |             .send(Message::Text("do you know".into()))
[INFO] [stdout] ...  |
[INFO] [stdout] 21 | |         println!("sent");
[INFO] [stdout] 22 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 23 | 
[INFO] [stdout] 24 |       println!("handle outgoing finished");
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]        Fixed src/bin/server.rs (3 fixes)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/bin/server.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | /     loop {
[INFO] [stdout] 23 | |         let mut s = String::new();
[INFO] [stdout] 24 | |         if rx.changed().await.is_ok() {
[INFO] [stdout] 25 | |             s.clone_from(&*rx.borrow());
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         }
[INFO] [stdout] 29 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 30 | 
[INFO] [stdout] 31 |       println!("handle outgoing finished");
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/bin/server.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | /     loop {
[INFO] [stdout] 23 | |         let mut s = String::new();
[INFO] [stdout] 24 | |         if rx.changed().await.is_ok() {
[INFO] [stdout] 25 | |             s.clone_from(&*rx.borrow());
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         }
[INFO] [stdout] 29 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 30 | 
[INFO] [stdout] 31 |       println!("handle outgoing finished");
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 31.98s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]    Compiling syn v1.0.48
[INFO] [stderr]     Checking futures-channel v0.3.8
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking getrandom v0.2.0
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking mio v0.7.6
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking async-io v1.2.0
[INFO] [stderr]     Checking rand_core v0.6.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking async-global-executor v1.4.3
[INFO] [stderr]     Checking rand v0.8.0
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking async-std v1.8.0
[INFO] [stderr]     Checking tungstenite v0.11.1
[INFO] [stderr]    Compiling pin-project-internal v1.0.1
[INFO] [stderr]    Compiling futures-macro v0.3.8
[INFO] [stderr]    Compiling tokio-macros v0.3.1
[INFO] [stderr]     Checking tokio v0.3.6
[INFO] [stderr]     Checking pin-project v1.0.1
[INFO] [stderr]     Checking futures-util v0.3.8
[INFO] [stderr]     Checking futures-executor v0.3.8
[INFO] [stderr]     Checking tokio-tungstenite v0.12.0
[INFO] [stderr]     Checking async-tungstenite v0.10.0
[INFO] [stderr]     Checking futures v0.3.8
[INFO] [stderr]     Checking async-playground v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/bin/server.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | /     loop {
[INFO] [stdout] 23 | |         let mut s = String::new();
[INFO] [stdout] 24 | |         if rx.changed().await.is_ok() {
[INFO] [stdout] 25 | |             s.clone_from(&*rx.borrow());
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         }
[INFO] [stdout] 29 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 30 | 
[INFO] [stdout] 31 |       println!("handle outgoing finished");
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/bin/client.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     loop {
[INFO] [stdout] 16 | |         sleep(Duration::from_secs(1)).await;
[INFO] [stdout] 17 | |         write_stream
[INFO] [stdout] 18 | |             .send(Message::Text("do you know".into()))
[INFO] [stdout] ...  |
[INFO] [stdout] 21 | |         println!("sent");
[INFO] [stdout] 22 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 23 | 
[INFO] [stdout] 24 |       println!("handle outgoing finished");
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/bin/client.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     loop {
[INFO] [stdout] 16 | |         sleep(Duration::from_secs(1)).await;
[INFO] [stdout] 17 | |         write_stream
[INFO] [stdout] 18 | |             .send(Message::Text("do you know".into()))
[INFO] [stdout] ...  |
[INFO] [stdout] 21 | |         println!("sent");
[INFO] [stdout] 22 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 23 | 
[INFO] [stdout] 24 |       println!("handle outgoing finished");
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/bin/server.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | /     loop {
[INFO] [stdout] 23 | |         let mut s = String::new();
[INFO] [stdout] 24 | |         if rx.changed().await.is_ok() {
[INFO] [stdout] 25 | |             s.clone_from(&*rx.borrow());
[INFO] [stdout] ...  |
[INFO] [stdout] 28 | |         }
[INFO] [stdout] 29 | |     }
[INFO] [stdout]    | |_____- any code following this expression is unreachable
[INFO] [stdout] 30 | 
[INFO] [stdout] 31 |       println!("handle outgoing finished");
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.78s
[INFO] running `Command { std: "docker" "inspect" "3b815968a5a4841e804882b6c69d5b4d121293c3971e86dcb5862ed1e0d6d728", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b815968a5a4841e804882b6c69d5b4d121293c3971e86dcb5862ed1e0d6d728", kill_on_drop: false }`
[INFO] [stdout] 3b815968a5a4841e804882b6c69d5b4d121293c3971e86dcb5862ed1e0d6d728