[INFO] fetching crate encoding-next 0.3.0...
[INFO] testing encoding-next-0.3.0 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate encoding-next 0.3.0 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate encoding-next 0.3.0
[INFO] finished tweaking crates.io crate encoding-next 0.3.0
[INFO] tweaked toml for crates.io crate encoding-next 0.3.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate encoding-next 0.3.0 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate encoding-next 0.3.0 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded encoding-next-types v0.2.0
[INFO] [stderr]   Downloaded encoding-next-index-singlebyte v1.20180106.0
[INFO] [stderr]   Downloaded encoding-next-index-tradchinese v1.20180106.0
[INFO] [stderr]   Downloaded encoding-next-index-korean v1.20180106.0
[INFO] [stderr]   Downloaded encoding-next-index-japanese v1.20180106.0
[INFO] [stderr]   Downloaded encoding-next-index-simpchinese v1.20180106.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54
[INFO] running `Command { std: "docker" "start" "be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling encoding-next-types v0.2.0
[INFO] [stderr]    Compiling encoding-next-index-singlebyte v1.20180106.0
[INFO] [stderr]    Compiling encoding-next-index-japanese v1.20180106.0
[INFO] [stderr]    Compiling encoding-next-index-korean v1.20180106.0
[INFO] [stderr]    Compiling encoding-next-index-simpchinese v1.20180106.0
[INFO] [stderr]    Compiling encoding-next-index-tradchinese v1.20180106.0
[INFO] [stderr]    Compiling encoding-next v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]   --> src/util.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub struct StatefulDecoderHelper<'a, St, Data: 'a> {
[INFO] [stdout]    |            --------------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub data: &'a Data,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary transmute
[INFO] [stdout]   --> src/util.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |     unsafe { mem::transmute(ch) }
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `char::from_u32(…).unwrap()`
[INFO] [stdout]    = note: `#[warn(unnecessary_transmutes)]` on by default
[INFO] [stdout] help: replace this with
[INFO] [stdout]    |
[INFO] [stdout] 17 -     unsafe { mem::transmute(ch) }
[INFO] [stdout] 17 +     unsafe { char::from_u32_unchecked(ch) }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary transmute
[INFO] [stdout]    --> src/util.rs:116:41
[INFO] [stdout]     |
[INFO] [stdout] 116 |         self.output.write_char(unsafe { mem::transmute(c) });
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using `char::from_u32(…).unwrap()`
[INFO] [stdout] help: replace this with
[INFO] [stdout]     |
[INFO] [stdout] 116 -         self.output.write_char(unsafe { mem::transmute(c) });
[INFO] [stdout] 116 +         self.output.write_char(unsafe { char::from_u32_unchecked(c) });
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 1.90s
[INFO] running `Command { std: "docker" "inspect" "be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-w" "/opt/rustwide/workdir" "--user" "0:0" "be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling encoding-next v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `data` is never read
[INFO] [stdout]   --> src/util.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub struct StatefulDecoderHelper<'a, St, Data: 'a> {
[INFO] [stdout]    |            --------------------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 68 |     pub data: &'a Data,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary transmute
[INFO] [stdout]   --> src/util.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |     unsafe { mem::transmute(ch) }
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider using `char::from_u32(…).unwrap()`
[INFO] [stdout]    = note: `#[warn(unnecessary_transmutes)]` on by default
[INFO] [stdout] help: replace this with
[INFO] [stdout]    |
[INFO] [stdout] 17 -     unsafe { mem::transmute(ch) }
[INFO] [stdout] 17 +     unsafe { char::from_u32_unchecked(ch) }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary transmute
[INFO] [stdout]    --> src/util.rs:116:41
[INFO] [stdout]     |
[INFO] [stdout] 116 |         self.output.write_char(unsafe { mem::transmute(c) });
[INFO] [stdout]     |                                         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: consider using `char::from_u32(…).unwrap()`
[INFO] [stdout] help: replace this with
[INFO] [stdout]     |
[INFO] [stdout] 116 -         self.output.write_char(unsafe { mem::transmute(c) });
[INFO] [stdout] 116 +         self.output.write_char(unsafe { char::from_u32_unchecked(c) });
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:219:19
[INFO] [stdout]     |
[INFO] [stdout] 219 | #![cfg_attr(test, feature(test))] // lib stability features as per RFC #507
[INFO] [stdout]     |                   ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `encoding-next` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54", kill_on_drop: false }`
[INFO] [stdout] be27d3836c5cc001b18eff35e2154945cea6746d2d1515c4dec5605f2bf6ae54
