[INFO] fetching crate proper 0.1.5...
[INFO] testing proper-0.1.5 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate proper 0.1.5 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate proper 0.1.5
[INFO] finished tweaking crates.io crate proper 0.1.5
[INFO] tweaked toml for crates.io crate proper 0.1.5 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate proper 0.1.5 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 4 packages to highest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v3.0.9)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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] fd238781ce4aef4b031af452b6b49d514c25cdad19cec2dd805559d188ecadcd
[INFO] running `Command { std: "docker" "start" "fd238781ce4aef4b031af452b6b49d514c25cdad19cec2dd805559d188ecadcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd238781ce4aef4b031af452b6b49d514c25cdad19cec2dd805559d188ecadcd", 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" "fd238781ce4aef4b031af452b6b49d514c25cdad19cec2dd805559d188ecadcd" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fd238781ce4aef4b031af452b6b49d514c25cdad19cec2dd805559d188ecadcd", 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" "fd238781ce4aef4b031af452b6b49d514c25cdad19cec2dd805559d188ecadcd" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proper v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:66:1
[INFO] [stdout]    |
[INFO] [stdout] 66 | #![feature(bind_by_move_pattern_guards, proc_macro_diagnostic, proc_macro_span)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `bind_by_move_pattern_guards` has been stable since `1.39.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `bind_by_move_pattern_guards` has been stable since 1.39.0 and no longer requires an attribute to enable
[INFO] [stdout]   --> src/lib.rs:66:12
[INFO] [stdout]    |
[INFO] [stdout] 66 | #![feature(bind_by_move_pattern_guards, proc_macro_diagnostic, proc_macro_span)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl u8>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> src/conversions.rs:89:40
[INFO] [stdout]    |
[INFO] [stdout] 89 |             if variants.len() <= <u8>::max_value() as usize {
[INFO] [stdout]    |                                        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl u16>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> src/conversions.rs:91:48
[INFO] [stdout]    |
[INFO] [stdout] 91 |             } else if variants.len() <= <u16>::max_value() as usize {
[INFO] [stdout]    |                                                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl u32>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> src/conversions.rs:93:48
[INFO] [stdout]    |
[INFO] [stdout] 93 |             } else if variants.len() <= <u32>::max_value() as usize {
[INFO] [stdout]    |                                                ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `core::num::<impl u64>::max_value`: replaced by the `MAX` associated constant on this type
[INFO] [stdout]   --> src/conversions.rs:95:48
[INFO] [stdout]    |
[INFO] [stdout] 95 |             } else if variants.len() <= <u64>::max_value() as usize {
[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 `proper` (lib) due to 1 previous error; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "fd238781ce4aef4b031af452b6b49d514c25cdad19cec2dd805559d188ecadcd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd238781ce4aef4b031af452b6b49d514c25cdad19cec2dd805559d188ecadcd", kill_on_drop: false }`
[INFO] [stdout] fd238781ce4aef4b031af452b6b49d514c25cdad19cec2dd805559d188ecadcd
