[INFO] cloning repository https://github.com/hoodie/rust-workshop-chat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hoodie/rust-workshop-chat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoodie%2Frust-workshop-chat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoodie%2Frust-workshop-chat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 546ad1274391213448c282914a46f558a5b137eb
[INFO] checking hoodie/rust-workshop-chat against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhoodie%2Frust-workshop-chat" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/hoodie/rust-workshop-chat 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/hoodie/rust-workshop-chat
[INFO] finished tweaking git repo https://github.com/hoodie/rust-workshop-chat
[INFO] tweaked toml for git repo https://github.com/hoodie/rust-workshop-chat written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/hoodie/rust-workshop-chat 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]  Downloading crates ...
[INFO] [stderr]   Downloaded addr2line v0.11.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] fde1711daea5d3a80c21c149a49eb9dbace7bdeed9c4b03be2910d69e9c41ee1
[INFO] running `Command { std: "docker" "start" "-a" "fde1711daea5d3a80c21c149a49eb9dbace7bdeed9c4b03be2910d69e9c41ee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fde1711daea5d3a80c21c149a49eb9dbace7bdeed9c4b03be2910d69e9c41ee1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fde1711daea5d3a80c21c149a49eb9dbace7bdeed9c4b03be2910d69e9c41ee1", kill_on_drop: false }`
[INFO] [stdout] fde1711daea5d3a80c21c149a49eb9dbace7bdeed9c4b03be2910d69e9c41ee1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] 2bd33cedf9c0b03e421a8d118b4d6f0becc0f70730ea128598e4e68cee397700
[INFO] running `Command { std: "docker" "start" "-a" "2bd33cedf9c0b03e421a8d118b4d6f0becc0f70730ea128598e4e68cee397700", kill_on_drop: false }`
[INFO] [stderr] Copying to /tmp/fixit
[INFO] [stderr] Running `cargo fix --edition`
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking arrayvec v0.5.1
[INFO] [stderr]     Checking plain v0.2.3
[INFO] [stderr]     Checking humantime v1.3.0
[INFO] [stderr]     Checking backtrace-sys v0.1.32
[INFO] [stderr]     Checking aho-corasick v0.7.8
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking log v0.4.8
[INFO] [stderr]     Checking findshlibs v0.5.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking gimli v0.20.0
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking addr2line v0.11.0
[INFO] [stderr]    Compiling scroll_derive v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]     Checking scroll v0.10.1
[INFO] [stderr]     Checking goblin v0.1.3
[INFO] [stderr]     Checking backtrace v0.3.43
[INFO] [stderr]     Checking color-backtrace v0.3.0
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking workshop-chat v0.1.0 (/tmp/fixit)
[INFO] [stderr]    Migrating examples/step3-better.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/server.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/step0.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/server2.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/step2.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/step3-bad.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating examples/step1.rs from 2018 edition to 2021
[INFO] [stdout] warning: variant is never constructed: `Close`
[INFO] [stdout]   --> examples/server.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Close,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Close`
[INFO] [stdout]   --> examples/server2.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Close,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `handler`
[INFO] [stdout]   --> examples/server2.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     handler: T,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.11s
[INFO] [stderr] Running `cargo check` to verify 2021
[INFO] [stderr]     Checking workshop-chat v0.1.0 (/tmp/fixit)
[INFO] [stdout] warning: variant is never constructed: `Close`
[INFO] [stdout]   --> examples/server2.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     Close,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `handler`
[INFO] [stdout]   --> examples/server2.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     handler: T,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Close`
[INFO] [stdout]   --> examples/server.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Close,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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 0.76s
[INFO] running `Command { std: "docker" "inspect" "2bd33cedf9c0b03e421a8d118b4d6f0becc0f70730ea128598e4e68cee397700", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bd33cedf9c0b03e421a8d118b4d6f0becc0f70730ea128598e4e68cee397700", kill_on_drop: false }`
[INFO] [stdout] 2bd33cedf9c0b03e421a8d118b4d6f0becc0f70730ea128598e4e68cee397700