[INFO] fetching crate tchannel_rs 0.0.2...
[INFO] checking tchannel_rs-0.0.2 against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar
[INFO] extracting crate tchannel_rs 0.0.2 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate tchannel_rs 0.0.2 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] started tweaking crates.io crate tchannel_rs 0.0.2
[INFO] finished tweaking crates.io crate tchannel_rs 0.0.2
[INFO] tweaked toml for crates.io crate tchannel_rs 0.0.2 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate crates.io crate tchannel_rs 0.0.2 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-stream-impl v0.3.3
[INFO] [stderr]   Downloaded test-case v2.0.2
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[INFO] [stderr]   Downloaded tracing v0.1.33
[INFO] [stderr]   Downloaded tracing-core v0.1.25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 912984c061a54ae31443d085f1f5ab4450e5cb9f971d6342518afe5a08bdfeb6
[INFO] running `Command { std: "docker" "start" "-a" "912984c061a54ae31443d085f1f5ab4450e5cb9f971d6342518afe5a08bdfeb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "912984c061a54ae31443d085f1f5ab4450e5cb9f971d6342518afe5a08bdfeb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "912984c061a54ae31443d085f1f5ab4450e5cb9f971d6342518afe5a08bdfeb6", kill_on_drop: false }`
[INFO] [stdout] 912984c061a54ae31443d085f1f5ab4450e5cb9f971d6342518afe5a08bdfeb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] b795d8147f4569f8bce8be71e13b75a5e678f7bf59cc5d502fefb44c66c791aa
[INFO] running `Command { std: "docker" "start" "-a" "b795d8147f4569f8bce8be71e13b75a5e678f7bf59cc5d502fefb44c66c791aa", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling libc v0.2.123
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[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling futures-channel v0.3.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling rustversion v1.0.6
[INFO] [stderr]    Compiling num-traits v0.2.14
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[INFO] [stderr]    Compiling async-trait v0.1.53
[INFO] [stderr]     Checking tracing-core v0.1.25
[INFO] [stderr]     Checking instant v0.1.12
[INFO] [stderr]    Compiling anyhow v1.0.56
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[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking socket2 v0.4.4
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[INFO] [stderr]    Compiling num-derive v0.3.3
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[INFO] [stderr]    Compiling derive-new v0.5.9
[INFO] [stderr]     Checking thiserror v1.0.30
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[INFO] [stderr]     Checking tracing v0.1.33
[INFO] [stderr]     Checking serial_test v0.6.0
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[INFO] [stderr]    Compiling darling v0.12.4
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[INFO] [stderr]     Checking tokio-util v0.6.9
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[INFO] [stderr]     Checking tchannel_rs v0.0.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Some` is imported redundantly
[INFO] [stdout]  --> src/config.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::option::Option::Some;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Some` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]  --> src/connection/mod.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures::{self, SinkExt};
[INFO] [stdout]   |               ^^^^ the item `futures` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `future` is imported redundantly
[INFO] [stdout]  --> src/connection/mod.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::prelude::*;
[INFO] [stdout]   |     ------------------- the item `future` is already imported here
[INFO] [stdout] 5 | use futures::{self, SinkExt};
[INFO] [stdout] 6 | use futures::{future, StreamExt};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]   --> src/server.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | use futures::{self, SinkExt, StreamExt, TryStreamExt};
[INFO] [stdout]    |               ^^^^ the item `futures` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Some` is imported redundantly
[INFO] [stdout]  --> src/config.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::option::Option::Some;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Some` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]  --> src/connection/mod.rs:5:15
[INFO] [stdout]   |
[INFO] [stdout] 5 | use futures::{self, SinkExt};
[INFO] [stdout]   |               ^^^^ the item `futures` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `future` is imported redundantly
[INFO] [stdout]  --> src/connection/mod.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | use futures::prelude::*;
[INFO] [stdout]   |     ------------------- the item `future` is already imported here
[INFO] [stdout] 5 | use futures::{self, SinkExt};
[INFO] [stdout] 6 | use futures::{future, StreamExt};
[INFO] [stdout]   |               ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `ArgSchemeValue` is imported redundantly
[INFO] [stdout]    --> src/defragmentation.rs:261:9
[INFO] [stdout]     |
[INFO] [stdout] 260 |     use super::*;
[INFO] [stdout]     |         -------- the item `ArgSchemeValue` is already imported here
[INFO] [stdout] 261 |     use crate::frames::headers::ArgSchemeValue;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CallRequest` is imported redundantly
[INFO] [stdout]    --> src/defragmentation.rs:264:9
[INFO] [stdout]     |
[INFO] [stdout] 260 |     use super::*;
[INFO] [stdout]     |         -------- the item `CallRequest` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 264 |         CallRequest, CallRequestFields, CallResponseFields, TraceFlags, Tracing,
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CallRequestFields` is imported redundantly
[INFO] [stdout]    --> src/defragmentation.rs:264:22
[INFO] [stdout]     |
[INFO] [stdout] 260 |     use super::*;
[INFO] [stdout]     |         -------- the item `CallRequestFields` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 264 |         CallRequest, CallRequestFields, CallResponseFields, TraceFlags, Tracing,
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CallResponseFields` is imported redundantly
[INFO] [stdout]    --> src/defragmentation.rs:264:41
[INFO] [stdout]     |
[INFO] [stdout] 260 |     use super::*;
[INFO] [stdout]     |         -------- the item `CallResponseFields` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 264 |         CallRequest, CallRequestFields, CallResponseFields, TraceFlags, Tracing,
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `CallContinue` is imported redundantly
[INFO] [stdout]    --> src/fragmentation.rs:277:9
[INFO] [stdout]     |
[INFO] [stdout] 276 |     use super::*;
[INFO] [stdout]     |         -------- the item `CallContinue` is already imported here
[INFO] [stdout] 277 |     use crate::frames::payloads::CallContinue;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TFrame` is imported redundantly
[INFO] [stdout]    --> src/fragmentation.rs:279:9
[INFO] [stdout]     |
[INFO] [stdout] 276 |     use super::*;
[INFO] [stdout]     |         -------- the item `TFrame` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 279 |     use crate::frames::TFrame;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `futures` is imported redundantly
[INFO] [stdout]   --> src/server.rs:13:15
[INFO] [stdout]    |
[INFO] [stdout] 13 | use futures::{self, SinkExt, StreamExt, TryStreamExt};
[INFO] [stdout]    |               ^^^^ the item `futures` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tracing` is never used
[INFO] [stdout]    --> src/frames/payloads.rs:209:8
[INFO] [stdout]     |
[INFO] [stdout] 207 | pub trait CallFields {
[INFO] [stdout]     |           ---------- method in this trait
[INFO] [stdout] 208 |     fn headers(&self) -> &HashMap<String, String>;
[INFO] [stdout] 209 |     fn tracing(&self) -> &Tracing;
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `tracing` is never used
[INFO] [stdout]    --> src/frames/payloads.rs:209:8
[INFO] [stdout]     |
[INFO] [stdout] 207 | pub trait CallFields {
[INFO] [stdout]     |           ---------- method in this trait
[INFO] [stdout] 208 |     fn headers(&self) -> &HashMap<String, String>;
[INFO] [stdout] 209 |     fn tracing(&self) -> &Tracing;
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `HandlerResult`, `RequestHandler`
[INFO] [stdout]  --> tests/json.rs:2:28
[INFO] [stdout]   |
[INFO] [stdout] 2 | use tchannel_rs::handler::{HandlerResult, RequestHandler};
[INFO] [stdout]   |                            ^^^^^^^^^^^^^  ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tchannel_rs::messages::MessageChannel`
[INFO] [stdout]  --> tests/json.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use tchannel_rs::messages::MessageChannel;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tchannel_rs::Config`
[INFO] [stdout]  --> tests/json.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use tchannel_rs::Config;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `TChannel`, `TResult`
[INFO] [stdout]  --> tests/json.rs:7:19
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tchannel_rs::{TChannel, TResult};
[INFO] [stdout]   |                   ^^^^^^^^  ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EchoHandler` is never constructed
[INFO] [stdout]   --> tests/json.rs:74:8
[INFO] [stdout]    |
[INFO] [stdout] 74 | struct EchoHandler {}
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `LOCAL_SERVER` is never used
[INFO] [stdout]   --> tests/json.rs:87:7
[INFO] [stdout]    |
[INFO] [stdout] 87 | const LOCAL_SERVER: &str = "127.0.0.1:8888";
[INFO] [stdout]    |       ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 43.72s
[INFO] running `Command { std: "docker" "inspect" "b795d8147f4569f8bce8be71e13b75a5e678f7bf59cc5d502fefb44c66c791aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b795d8147f4569f8bce8be71e13b75a5e678f7bf59cc5d502fefb44c66c791aa", kill_on_drop: false }`
[INFO] [stdout] b795d8147f4569f8bce8be71e13b75a5e678f7bf59cc5d502fefb44c66c791aa