[INFO] fetching crate toy_xcb 0.2.0-beta.0...
[INFO] checking toy_xcb-0.2.0-beta.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate toy_xcb 0.2.0-beta.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate toy_xcb 0.2.0-beta.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 toy_xcb 0.2.0-beta.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate toy_xcb 0.2.0-beta.0
[INFO] tweaked toml for crates.io crate toy_xcb 0.2.0-beta.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate toy_xcb 0.2.0-beta.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 xkbcommon v0.5.0-beta.0
[INFO] [stderr]   Downloaded x11 v2.19.1
[INFO] [stderr]   Downloaded xcb v1.0.0-beta.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 74c1f130639c78c3b411ae1b2c21b0fc265a61c6d92e2eb24a969bf40d43d637
[INFO] running `Command { std: "docker" "start" "-a" "74c1f130639c78c3b411ae1b2c21b0fc265a61c6d92e2eb24a969bf40d43d637", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74c1f130639c78c3b411ae1b2c21b0fc265a61c6d92e2eb24a969bf40d43d637", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74c1f130639c78c3b411ae1b2c21b0fc265a61c6d92e2eb24a969bf40d43d637", kill_on_drop: false }`
[INFO] [stdout] 74c1f130639c78c3b411ae1b2c21b0fc265a61c6d92e2eb24a969bf40d43d637
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 98bee029db123ffd3d867583cae6d086f3627ab5190a509060f2637424996815
[INFO] running `Command { std: "docker" "start" "-a" "98bee029db123ffd3d867583cae6d086f3627ab5190a509060f2637424996815", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling x11 v2.19.1
[INFO] [stderr]    Compiling quick-xml v0.22.0
[INFO] [stderr]    Compiling xcb v1.0.0-beta.0
[INFO] [stderr]     Checking xkbcommon v0.5.0-beta.0
[INFO] [stderr]     Checking toy_xcb v0.2.0-beta.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `xcb` is imported redundantly
[INFO] [stdout]  --> src/keyboard.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use xcb;
[INFO] [stdout]   |     ^^^ the item `xcb` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `xcb` is imported redundantly
[INFO] [stdout]   --> src/window.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | use xcb::{self, Xid};
[INFO] [stdout]    |           ^^^^ the item `xcb` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `xcb` is imported redundantly
[INFO] [stdout]  --> src/keyboard.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use xcb;
[INFO] [stdout]   |     ^^^ the item `xcb` is already defined by prelude
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `xcb` is imported redundantly
[INFO] [stdout]   --> src/window.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 | use xcb::{self, Xid};
[INFO] [stdout]    |           ^^^^ the item `xcb` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.14s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: quick-xml v0.22.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "98bee029db123ffd3d867583cae6d086f3627ab5190a509060f2637424996815", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98bee029db123ffd3d867583cae6d086f3627ab5190a509060f2637424996815", kill_on_drop: false }`
[INFO] [stdout] 98bee029db123ffd3d867583cae6d086f3627ab5190a509060f2637424996815
[INFO] checking toy_xcb-0.2.0-beta.0 against try#3a4bc97f6385a3aa300a4fd689b44350e54fd676 for no-never-type-fallback
[INFO] extracting crate toy_xcb 0.2.0-beta.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate toy_xcb 0.2.0-beta.0 on toolchain 3a4bc97f6385a3aa300a4fd689b44350e54fd676
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate toy_xcb 0.2.0-beta.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate toy_xcb 0.2.0-beta.0
[INFO] tweaked toml for crates.io crate toy_xcb 0.2.0-beta.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate toy_xcb 0.2.0-beta.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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6b85560c61b3542c7c3a86b55c122e1ab69f1a1cb37b79ed1e03761ba81fb986
[INFO] running `Command { std: "docker" "start" "-a" "6b85560c61b3542c7c3a86b55c122e1ab69f1a1cb37b79ed1e03761ba81fb986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6b85560c61b3542c7c3a86b55c122e1ab69f1a1cb37b79ed1e03761ba81fb986", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b85560c61b3542c7c3a86b55c122e1ab69f1a1cb37b79ed1e03761ba81fb986", kill_on_drop: false }`
[INFO] [stdout] 6b85560c61b3542c7c3a86b55c122e1ab69f1a1cb37b79ed1e03761ba81fb986
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+3a4bc97f6385a3aa300a4fd689b44350e54fd676" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e3ece80b01c47678f2c76284a1176b654977a7ff03180f41c578a6dfe0784660
[INFO] running `Command { std: "docker" "start" "-a" "e3ece80b01c47678f2c76284a1176b654977a7ff03180f41c578a6dfe0784660", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.107
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling x11 v2.19.1
[INFO] [stderr]    Compiling quick-xml v0.22.0
[INFO] [stdout] error[E0284]: type annotations needed: cannot satisfy `_ -> _`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/quick-xml-0.22.0/src/events/attributes.rs:352:17
[INFO] [stdout]     |
[INFO] [stdout] 352 | /                 if self.html {
[INFO] [stdout] 353 | |                     attr!($key, 0..0)
[INFO] [stdout] 354 | |                 } else {
[INFO] [stdout] 355 | |                     return None;
[INFO] [stdout] 356 | |                 };
[INFO] [stdout]     | |_________________^ cannot satisfy `_ -> _`
[INFO] [stdout] ...
[INFO] [stdout] 379 |               None => attr!(self.position..len),
[INFO] [stdout]     |                       ------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the macro `attr` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0284`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `quick-xml` (lib) due to 2 previous errors; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "e3ece80b01c47678f2c76284a1176b654977a7ff03180f41c578a6dfe0784660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3ece80b01c47678f2c76284a1176b654977a7ff03180f41c578a6dfe0784660", kill_on_drop: false }`
[INFO] [stdout] e3ece80b01c47678f2c76284a1176b654977a7ff03180f41c578a6dfe0784660