[INFO] fetching crate discord-rpc-client 0.4.0...
[INFO] checking discord-rpc-client-0.4.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate discord-rpc-client 0.4.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate discord-rpc-client 0.4.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate discord-rpc-client 0.4.0
[INFO] finished tweaking crates.io crate discord-rpc-client 0.4.0
[INFO] tweaked toml for crates.io crate discord-rpc-client 0.4.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate discord-rpc-client 0.4.0 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded version-sync v0.9.5
[INFO] [stderr]   Downloaded named_pipe v0.4.1
[INFO] [stderr]   Downloaded num-derive v0.4.1
[INFO] [stderr]   Downloaded hashbrown v0.14.1
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb6c82408b624db5866b4e82086e88ec832fa872ec14ca243b2a61ccfcaf1a49
[INFO] running `Command { std: "docker" "start" "-a" "cb6c82408b624db5866b4e82086e88ec832fa872ec14ca243b2a61ccfcaf1a49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb6c82408b624db5866b4e82086e88ec832fa872ec14ca243b2a61ccfcaf1a49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb6c82408b624db5866b4e82086e88ec832fa872ec14ca243b2a61ccfcaf1a49", kill_on_drop: false }`
[INFO] [stdout] cb6c82408b624db5866b4e82086e88ec832fa872ec14ca243b2a61ccfcaf1a49
[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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa4e5b5d327c37447f7ba21035227d5eeb2d9459ac9a16b23117a57446a291ca
[INFO] running `Command { std: "docker" "start" "-a" "aa4e5b5d327c37447f7ba21035227d5eeb2d9459ac9a16b23117a57446a291ca", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.189
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling proc-macro2 v1.0.69
[INFO] [stderr]     Checking hashbrown v0.14.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.16
[INFO] [stderr]     Checking unicode-ident v1.0.12
[INFO] [stderr]    Compiling semver v1.0.20
[INFO] [stderr]    Compiling num-traits v0.2.17
[INFO] [stderr]    Compiling pulldown-cmark v0.9.3
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking winnow v0.5.17
[INFO] [stderr]    Compiling time-macros v0.2.15
[INFO] [stderr]    Compiling syn v2.0.38
[INFO] [stderr]     Checking deranged v0.3.9
[INFO] [stderr]     Checking num_threads v0.1.6
[INFO] [stderr]     Checking indexmap v2.0.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.8
[INFO] [stderr]     Checking quote v1.0.33
[INFO] [stderr]     Checking getrandom v0.2.10
[INFO] [stderr]     Checking uuid v1.4.1
[INFO] [stderr]     Checking time v0.3.30
[INFO] [stderr]    Compiling serde_derive v1.0.189
[INFO] [stderr]    Compiling num-derive v0.4.1
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking simplelog v0.12.1
[INFO] [stderr]     Checking toml_datetime v0.6.3
[INFO] [stderr]     Checking serde_spanned v0.6.3
[INFO] [stderr]     Checking serde_json v1.0.107
[INFO] [stderr]     Checking toml_edit v0.19.15
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking toml v0.7.8
[INFO] [stderr]     Checking version-sync v0.9.5
[INFO] [stderr]     Checking discord-rpc-client v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Sized` is imported redundantly
[INFO] [stdout]  --> src/connection/base.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     marker::Sized,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Sized` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Sized` is imported redundantly
[INFO] [stdout]  --> src/connection/base.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     marker::Sized,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/ceab6128fa48a616bfd3e3adf4bc80133b8ee223/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Sized` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/models/rich_presence.rs:93:9
[INFO] [stdout]    |
[INFO] [stdout] 93 |     use serde_json;
[INFO] [stdout]    |         ^^^^^^^^^^ the item `serde_json` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `ping` is never used
[INFO] [stdout]   --> src/connection/base.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub trait Connection: Sized {
[INFO] [stdout]    |           ---------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn ping(&mut self) -> Result<OpCode> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `ping` is never used
[INFO] [stdout]   --> src/connection/base.rs:68:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub trait Connection: Sized {
[INFO] [stdout]    |           ---------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 68 |     fn ping(&mut self) -> Result<OpCode> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.92s
[INFO] running `Command { std: "docker" "inspect" "aa4e5b5d327c37447f7ba21035227d5eeb2d9459ac9a16b23117a57446a291ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa4e5b5d327c37447f7ba21035227d5eeb2d9459ac9a16b23117a57446a291ca", kill_on_drop: false }`
[INFO] [stdout] aa4e5b5d327c37447f7ba21035227d5eeb2d9459ac9a16b23117a57446a291ca