[INFO] fetching crate sign_mail 0.2.2...
[INFO] checking sign_mail-0.2.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate sign_mail 0.2.2 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate sign_mail 0.2.2 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking crates.io crate sign_mail 0.2.2
[INFO] finished tweaking crates.io crate sign_mail 0.2.2
[INFO] tweaked toml for crates.io crate sign_mail 0.2.2 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 98 packages
[INFO] [stderr]       Adding async-channel v1.9.0 (latest: v2.2.0)
[INFO] [stderr]       Adding async-io v1.13.0 (latest: v2.3.2)
[INFO] [stderr]       Adding async-lock v2.8.0 (latest: v3.3.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding event-listener v2.5.3 (latest: v5.3.0)
[INFO] [stderr]       Adding event-listener v4.0.3 (latest: v5.3.0)
[INFO] [stderr]       Adding event-listener-strategy v0.4.0 (latest: v0.5.1)
[INFO] [stderr]       Adding fastrand v1.9.0 (latest: v2.0.2)
[INFO] [stderr]       Adding futures-lite v1.13.0 (latest: v2.3.0)
[INFO] [stderr]       Adding gloo-timers v0.2.6 (latest: v0.3.0)
[INFO] [stderr]       Adding io-lifetimes v1.0.11 (latest: v2.0.3)
[INFO] [stderr]       Adding linux-raw-sys v0.3.8 (latest: v0.6.4)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding polling v2.8.0 (latest: v3.6.0)
[INFO] [stderr]       Adding rustix v0.37.27 (latest: v0.38.32)
[INFO] [stderr]       Adding socket2 v0.4.10 (latest: v0.5.6)
[INFO] [stderr]       Adding windows-sys v0.48.0 (latest: v0.52.0)
[INFO] [stderr]       Adding windows-targets v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_aarch64_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_i686_msvc v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnu v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_gnullvm v0.48.5 (latest: v0.52.4)
[INFO] [stderr]       Adding windows_x86_64_msvc v0.48.5 (latest: v0.52.4)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51142785692d865196c2912fbfca7e22cdef660d66727f880088f33ad55fb4f6
[INFO] running `Command { std: "docker" "start" "-a" "51142785692d865196c2912fbfca7e22cdef660d66727f880088f33ad55fb4f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51142785692d865196c2912fbfca7e22cdef660d66727f880088f33ad55fb4f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51142785692d865196c2912fbfca7e22cdef660d66727f880088f33ad55fb4f6", kill_on_drop: false }`
[INFO] [stdout] 51142785692d865196c2912fbfca7e22cdef660d66727f880088f33ad55fb4f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a99ebc85f1b31fb134f6224c2320812c90d652de066a359ea831c671a91d51c6
[INFO] running `Command { std: "docker" "start" "-a" "a99ebc85f1b31fb134f6224c2320812c90d652de066a359ea831c671a91d51c6", kill_on_drop: false }`
[INFO] [stderr]     Checking tracing-core v0.1.32
[INFO] [stderr]    Compiling rustix v0.38.32
[INFO] [stderr]     Checking value-bag v1.8.1
[INFO] [stderr]     Checking futures-lite v2.3.0
[INFO] [stderr]     Checking linux-raw-sys v0.4.13
[INFO] [stderr]    Compiling polling v2.8.0
[INFO] [stderr]    Compiling rustix v0.37.27
[INFO] [stderr]     Checking atomic-waker v1.1.2
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]    Compiling async-io v1.13.0
[INFO] [stderr]     Checking concurrent-queue v2.4.0
[INFO] [stderr]     Checking io-lifetimes v1.0.11
[INFO] [stderr]     Checking async-lock v2.8.0
[INFO] [stderr]     Checking socket2 v0.4.10
[INFO] [stderr]     Checking piper v0.2.1
[INFO] [stderr]     Checking event-listener v4.0.3
[INFO] [stderr]     Checking event-listener v5.3.0
[INFO] [stderr]     Checking async-channel v1.9.0
[INFO] [stderr]     Checking futures-util v0.3.30
[INFO] [stderr]     Checking log v0.4.21
[INFO] [stderr]     Checking tracing v0.1.40
[INFO] [stderr]     Checking event-listener-strategy v0.5.1
[INFO] [stderr]     Checking event-listener-strategy v0.4.0
[INFO] [stderr]     Checking async-channel v2.2.0
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking async-lock v3.3.0
[INFO] [stderr]     Checking blocking v1.5.1
[INFO] [stderr]     Checking async-executor v1.9.1
[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking futures v0.3.30
[INFO] [stderr]     Checking polling v3.6.0
[INFO] [stderr]     Checking async-io v2.3.2
[INFO] [stderr]     Checking async-global-executor v2.4.1
[INFO] [stderr]     Checking async-std v1.12.0
[INFO] [stderr]     Checking sign_mail v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Client` is imported redundantly
[INFO] [stdout]    --> src/server.rs:232:17
[INFO] [stdout]     |
[INFO] [stdout] 232 |     use crate::{Client, ConnectionEvent};
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout] 233 |
[INFO] [stdout] 234 |     use super::*;
[INFO] [stdout]     |         -------- the item `Client` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ConnectionEvent` is imported redundantly
[INFO] [stdout]    --> src/server.rs:232:25
[INFO] [stdout]     |
[INFO] [stdout] 232 |     use crate::{Client, ConnectionEvent};
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^
[INFO] [stdout] 233 |
[INFO] [stdout] 234 |     use super::*;
[INFO] [stdout]     |         -------- the item `ConnectionEvent` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]    --> src/client.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |     use async_std::future::Future;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 145 |     use super::*;
[INFO] [stdout]     |         -------- the item `Future` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SocketAddr` is imported redundantly
[INFO] [stdout]    --> src/client.rs:142:26
[INFO] [stdout]     |
[INFO] [stdout] 142 |     use async_std::net::{SocketAddr, TcpStream};
[INFO] [stdout]     |                          ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 145 |     use super::*;
[INFO] [stdout]     |         -------- the item `SocketAddr` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SinkExt` is imported redundantly
[INFO] [stdout]    --> src/client.rs:143:19
[INFO] [stdout]     |
[INFO] [stdout] 143 |     use futures::{SinkExt, io::{WriteHalf, ReadHalf}};
[INFO] [stdout]     |                   ^^^^^^^
[INFO] [stdout] 144 |     use crate::ConnectionEvent;
[INFO] [stdout] 145 |     use super::*;
[INFO] [stdout]     |         -------- the item `SinkExt` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ConnectionEvent` is imported redundantly
[INFO] [stdout]    --> src/client.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |     use crate::ConnectionEvent;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 145 |     use super::*;
[INFO] [stdout]     |         -------- the item `ConnectionEvent` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Client` is imported redundantly
[INFO] [stdout]    --> src/server.rs:232:17
[INFO] [stdout]     |
[INFO] [stdout] 232 |     use crate::{Client, ConnectionEvent};
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout] 233 |
[INFO] [stdout] 234 |     use super::*;
[INFO] [stdout]     |         -------- the item `Client` is already imported here
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ConnectionEvent` is imported redundantly
[INFO] [stdout]    --> src/server.rs:232:25
[INFO] [stdout]     |
[INFO] [stdout] 232 |     use crate::{Client, ConnectionEvent};
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^
[INFO] [stdout] 233 |
[INFO] [stdout] 234 |     use super::*;
[INFO] [stdout]     |         -------- the item `ConnectionEvent` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Future` is imported redundantly
[INFO] [stdout]    --> src/client.rs:141:9
[INFO] [stdout]     |
[INFO] [stdout] 141 |     use async_std::future::Future;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 145 |     use super::*;
[INFO] [stdout]     |         -------- the item `Future` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SocketAddr` is imported redundantly
[INFO] [stdout]    --> src/client.rs:142:26
[INFO] [stdout]     |
[INFO] [stdout] 142 |     use async_std::net::{SocketAddr, TcpStream};
[INFO] [stdout]     |                          ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 145 |     use super::*;
[INFO] [stdout]     |         -------- the item `SocketAddr` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `SinkExt` is imported redundantly
[INFO] [stdout]    --> src/client.rs:143:19
[INFO] [stdout]     |
[INFO] [stdout] 143 |     use futures::{SinkExt, io::{WriteHalf, ReadHalf}};
[INFO] [stdout]     |                   ^^^^^^^
[INFO] [stdout] 144 |     use crate::ConnectionEvent;
[INFO] [stdout] 145 |     use super::*;
[INFO] [stdout]     |         -------- the item `SinkExt` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ConnectionEvent` is imported redundantly
[INFO] [stdout]    --> src/client.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 |     use crate::ConnectionEvent;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 145 |     use super::*;
[INFO] [stdout]     |         -------- the item `ConnectionEvent` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 12.59s
[INFO] running `Command { std: "docker" "inspect" "a99ebc85f1b31fb134f6224c2320812c90d652de066a359ea831c671a91d51c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a99ebc85f1b31fb134f6224c2320812c90d652de066a359ea831c671a91d51c6", kill_on_drop: false }`
[INFO] [stdout] a99ebc85f1b31fb134f6224c2320812c90d652de066a359ea831c671a91d51c6