[INFO] fetching crate message-io 0.18.0...
[INFO] checking message-io-0.18.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate message-io 0.18.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate message-io 0.18.0 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] started tweaking crates.io crate message-io 0.18.0
[INFO] finished tweaking crates.io crate message-io 0.18.0
[INFO] tweaked toml for crates.io crate message-io 0.18.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate message-io 0.18.0 already has a lockfile, it will not be regenerated
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded test-case v1.2.3
[INFO] [stderr]   Downloaded os_str_bytes v6.5.1
[INFO] [stderr]   Downloaded tungstenite v0.16.0
[INFO] [stderr]   Downloaded fern v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] b9cceb54fc693a5ce5bce0450d9462e6432e5dd5ee873c8d52ebfebc0eb12a58
[INFO] running `Command { std: "docker" "start" "-a" "b9cceb54fc693a5ce5bce0450d9462e6432e5dd5ee873c8d52ebfebc0eb12a58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9cceb54fc693a5ce5bce0450d9462e6432e5dd5ee873c8d52ebfebc0eb12a58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9cceb54fc693a5ce5bce0450d9462e6432e5dd5ee873c8d52ebfebc0eb12a58", kill_on_drop: false }`
[INFO] [stdout] b9cceb54fc693a5ce5bce0450d9462e6432e5dd5ee873c8d52ebfebc0eb12a58
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] bbfb8ba53691e3bfd60ae547980548a757e75ea2357b2feda647c6baa3a2f83f
[INFO] running `Command { std: "docker" "start" "-a" "bbfb8ba53691e3bfd60ae547980548a757e75ea2357b2feda647c6baa3a2f83f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.66
[INFO] [stderr]    Compiling libc v0.2.148
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]    Compiling memoffset v0.9.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.15
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling memoffset v0.7.1
[INFO] [stderr]     Checking log v0.4.20
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]    Compiling rayon-core v1.11.0
[INFO] [stderr]    Compiling serde_json v1.0.106
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]     Checking either v1.9.0
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]    Compiling thiserror v1.0.48
[INFO] [stderr]     Checking ciborium-io v0.2.1
[INFO] [stderr]     Checking bytes v1.5.0
[INFO] [stderr]     Checking os_str_bytes v6.5.1
[INFO] [stderr]     Checking cpufeatures v0.2.9
[INFO] [stderr]     Checking half v1.8.2
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]     Checking opaque-debug v0.3.0
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling test-case v1.2.3
[INFO] [stderr]     Checking textwrap v0.16.0
[INFO] [stderr]     Checking utf-8 v0.7.6
[INFO] [stderr]     Checking byteorder v1.4.3
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[INFO] [stderr]     Checking integer-encoding v3.0.4
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[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling syn v2.0.32
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking url v2.4.1
[INFO] [stderr]     Checking regex-automata v0.3.8
[INFO] [stderr]     Checking plotters v0.3.5
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[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking regex v1.9.5
[INFO] [stderr]     Checking rayon v1.7.0
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling thiserror-impl v1.0.48
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]     Checking tungstenite v0.16.0
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stderr]     Checking ciborium v0.2.1
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking message-io v0.18.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `crossbeam_channel` is imported redundantly
[INFO] [stdout]  --> src/events.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crossbeam_channel::{self, Sender, Receiver, select};
[INFO] [stdout]   |                         ^^^^ the item `crossbeam_channel` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&mut &mio::net::TcpStream` instead of dereferencing the inner type
[INFO] [stdout]    --> src/adapters/tcp.rs:169:25
[INFO] [stdout]     |
[INFO] [stdout] 169 |             match stream.deref().read(&mut input_buffer) {
[INFO] [stdout]     |                         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&mut &mio::net::TcpStream` instead of dereferencing the inner type
[INFO] [stdout]    --> src/adapters/tcp.rs:195:25
[INFO] [stdout]     |
[INFO] [stdout] 195 |             match stream.deref().write(&data[total_bytes_sent..]) {
[INFO] [stdout]     |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&mut &mio::net::TcpStream` instead of dereferencing the inner type
[INFO] [stdout]    --> src/adapters/framed_tcp.rs:107:25
[INFO] [stdout]     |
[INFO] [stdout] 107 |             match stream.deref().read(&mut input_buffer) {
[INFO] [stdout]     |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&mut &mio::net::TcpStream` instead of dereferencing the inner type
[INFO] [stdout]    --> src/adapters/framed_tcp.rs:144:25
[INFO] [stdout]     |
[INFO] [stdout] 144 |             match stream.deref().write(data_to_send) {
[INFO] [stdout]     |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stdout] warning: the item `Duration` is imported redundantly
[INFO] [stdout]    --> src/node.rs:520:21
[INFO] [stdout]     |
[INFO] [stdout] 519 |     use super::*;
[INFO] [stdout]     |         -------- the item `Duration` is already imported here
[INFO] [stdout] 520 |     use std::time::{Duration};
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `IpAddr` is imported redundantly
[INFO] [stdout]    --> src/network/remote_addr.rs:157:20
[INFO] [stdout]     |
[INFO] [stdout] 156 |     use super::*;
[INFO] [stdout]     |         -------- the item `IpAddr` is already imported here
[INFO] [stdout] 157 |     use std::net::{IpAddr, Ipv4Addr};
[INFO] [stdout]     |                    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Ipv4Addr` is imported redundantly
[INFO] [stdout]    --> src/network/remote_addr.rs:157:28
[INFO] [stdout]     |
[INFO] [stdout] 156 |     use super::*;
[INFO] [stdout]     |         -------- the item `Ipv4Addr` is already imported here
[INFO] [stdout] 157 |     use std::net::{IpAddr, Ipv4Addr};
[INFO] [stdout]     |                            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Duration` is imported redundantly
[INFO] [stdout]    --> src/network.rs:403:21
[INFO] [stdout]     |
[INFO] [stdout] 402 |     use super::*;
[INFO] [stdout]     |         -------- the item `Duration` is already imported here
[INFO] [stdout] 403 |     use std::time::{Duration};
[INFO] [stdout]     |                     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `crossbeam_channel` is imported redundantly
[INFO] [stdout]  --> src/events.rs:1:25
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crossbeam_channel::{self, Sender, Receiver, select};
[INFO] [stdout]   |                         ^^^^ the item `crossbeam_channel` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&mut &mio::net::TcpStream` instead of dereferencing the inner type
[INFO] [stdout]    --> src/adapters/tcp.rs:169:25
[INFO] [stdout]     |
[INFO] [stdout] 169 |             match stream.deref().read(&mut input_buffer) {
[INFO] [stdout]     |                         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&mut &mio::net::TcpStream` instead of dereferencing the inner type
[INFO] [stdout]    --> src/adapters/tcp.rs:195:25
[INFO] [stdout]     |
[INFO] [stdout] 195 |             match stream.deref().write(&data[total_bytes_sent..]) {
[INFO] [stdout]     |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&mut &mio::net::TcpStream` instead of dereferencing the inner type
[INFO] [stdout]    --> src/adapters/framed_tcp.rs:107:25
[INFO] [stdout]     |
[INFO] [stdout] 107 |             match stream.deref().read(&mut input_buffer) {
[INFO] [stdout]     |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.deref()` on a double reference, which returns `&mut &mio::net::TcpStream` instead of dereferencing the inner type
[INFO] [stdout]    --> src/adapters/framed_tcp.rs:144:25
[INFO] [stdout]     |
[INFO] [stdout] 144 |             match stream.deref().write(data_to_send) {
[INFO] [stdout]     |                         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 28.27s
[INFO] running `Command { std: "docker" "inspect" "bbfb8ba53691e3bfd60ae547980548a757e75ea2357b2feda647c6baa3a2f83f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bbfb8ba53691e3bfd60ae547980548a757e75ea2357b2feda647c6baa3a2f83f", kill_on_drop: false }`
[INFO] [stdout] bbfb8ba53691e3bfd60ae547980548a757e75ea2357b2feda647c6baa3a2f83f