[INFO] fetching crate canonical 0.6.5...
[INFO] testing canonical-0.6.5 against 1.55.0 for beta-1.56-1
[INFO] extracting crate canonical 0.6.5 into /workspace/builds/worker-59/source
[INFO] validating manifest of crates.io crate canonical 0.6.5 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate canonical 0.6.5
[INFO] finished tweaking crates.io crate canonical 0.6.5
[INFO] tweaked toml for crates.io crate canonical 0.6.5 written to /workspace/builds/worker-59/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded canonical_derive v0.6.0
[INFO] [stderr]   Downloaded canonical_fuzz v0.6.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d03c97b125b25a9cd2a60249867e14eee9d94f8b5a28eba7928e39d383b6a2b
[INFO] running `Command { std: "docker" "start" "-a" "5d03c97b125b25a9cd2a60249867e14eee9d94f8b5a28eba7928e39d383b6a2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d03c97b125b25a9cd2a60249867e14eee9d94f8b5a28eba7928e39d383b6a2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d03c97b125b25a9cd2a60249867e14eee9d94f8b5a28eba7928e39d383b6a2b", kill_on_drop: false }`
[INFO] [stdout] 5d03c97b125b25a9cd2a60249867e14eee9d94f8b5a28eba7928e39d383b6a2b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-59/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a5f8600532847fed2dfbf4b1af26a4acfc589b2388a6f37f4dab5c5656a205a
[INFO] running `Command { std: "docker" "start" "-a" "6a5f8600532847fed2dfbf4b1af26a4acfc589b2388a6f37f4dab5c5656a205a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling nodrop v0.1.14
[INFO] [stderr]    Compiling constant_time_eq v0.1.5
[INFO] [stderr]    Compiling arrayref v0.3.6
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling dusk-varint v0.1.0
[INFO] [stderr]    Compiling array-init v2.0.0
[INFO] [stderr]    Compiling arbitrary v1.0.2
[INFO] [stderr]    Compiling blake2b_simd v0.3.1
[INFO] [stderr]    Compiling canonical v0.6.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:16:1
[INFO] [stdout]    |
[INFO] [stdout] 16 | #![feature(never_type)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `repr::Repr`: Please use the Link in `microkelvin` instead
[INFO] [stdout]   --> src/lib.rs:29:16
[INFO] [stdout]    |
[INFO] [stdout] 29 | pub use repr::{Repr, Val, ValMut};
[INFO] [stdout]    |                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `repr::Repr`: Please use the Link in `microkelvin` instead
[INFO] [stdout]   --> src/repr.rs:49:19
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl<T> Clone for Repr<T> {
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `repr::Repr`: Please use the Link in `microkelvin` instead
[INFO] [stdout]   --> src/repr.rs:55:19
[INFO] [stdout]    |
[INFO] [stdout] 55 | impl<T> Canon for Repr<T>
[INFO] [stdout]    |                   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated struct `repr::Repr`: Please use the Link in `microkelvin` instead
[INFO] [stdout]    --> src/repr.rs:144:9
[INFO] [stdout]     |
[INFO] [stdout] 144 | impl<T> Repr<T> {
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated tuple struct `repr::Repr`: Please use the Link in `microkelvin` instead
[INFO] [stdout]   --> src/repr.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |         Repr(self.0.clone())
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated tuple struct `repr::Repr`: Please use the Link in `microkelvin` instead
[INFO] [stdout]   --> src/repr.rs:84:12
[INFO] [stdout]    |
[INFO] [stdout] 84 |         Ok(Repr(RefCell::new(ReprInner::Id(Id::decode(source)?))))
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated tuple struct `repr::Repr`: Please use the Link in `microkelvin` instead
[INFO] [stdout]    --> src/repr.rs:147:9
[INFO] [stdout]     |
[INFO] [stdout] 147 |         Repr(RefCell::new(ReprInner::Value(Rc::new(t))))
[INFO] [stdout]     |         ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `repr::Repr::0`: Please use the Link in `microkelvin` instead
[INFO] [stdout]   --> src/repr.rs:51:14
[INFO] [stdout]    |
[INFO] [stdout] 51 |         Repr(self.0.clone())
[INFO] [stdout]    |              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `repr::Repr::0`: Please use the Link in `microkelvin` instead
[INFO] [stdout]   --> src/repr.rs:61:26
[INFO] [stdout]    |
[INFO] [stdout] 61 |         let mut borrow = self.0.borrow_mut();
[INFO] [stdout]    |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `repr::Repr::0`: Please use the Link in `microkelvin` instead
[INFO] [stdout]   --> src/repr.rs:89:17
[INFO] [stdout]    |
[INFO] [stdout] 89 |         match &*self.0.borrow() {
[INFO] [stdout]    |                 ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `repr::Repr::0`: Please use the Link in `microkelvin` instead
[INFO] [stdout]    --> src/repr.rs:156:26
[INFO] [stdout]     |
[INFO] [stdout] 156 |         let mut borrow = self.0.borrow_mut();
[INFO] [stdout]     |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `repr::Repr::0`: Please use the Link in `microkelvin` instead
[INFO] [stdout]    --> src/repr.rs:168:16
[INFO] [stdout]     |
[INFO] [stdout] 168 |         Ok(Val(self.0.borrow()))
[INFO] [stdout]     |                ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated field `repr::Repr::0`: Please use the Link in `microkelvin` instead
[INFO] [stdout]    --> src/repr.rs:177:26
[INFO] [stdout]     |
[INFO] [stdout] 177 |         let mut borrow = self.0.borrow_mut();
[INFO] [stdout]     |                          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `canonical` due to 2 previous errors; 13 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6a5f8600532847fed2dfbf4b1af26a4acfc589b2388a6f37f4dab5c5656a205a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a5f8600532847fed2dfbf4b1af26a4acfc589b2388a6f37f4dab5c5656a205a", kill_on_drop: false }`
[INFO] [stdout] 6a5f8600532847fed2dfbf4b1af26a4acfc589b2388a6f37f4dab5c5656a205a