[INFO] cloning repository https://github.com/milesand/calculator-the-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/milesand/calculator-the-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmilesand%2Fcalculator-the-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmilesand%2Fcalculator-the-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aa074792688f3ccc44a51a3e5b7af26239e9751d
[INFO] checking milesand/calculator-the-solver against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmilesand%2Fcalculator-the-solver" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/milesand/calculator-the-solver 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 git repo https://github.com/milesand/calculator-the-solver
[INFO] finished tweaking git repo https://github.com/milesand/calculator-the-solver
[INFO] tweaked toml for git repo https://github.com/milesand/calculator-the-solver written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/milesand/calculator-the-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 46c4d96653379508e98d70f4e5c4436936534672d66c9630eb8d862b4cacc201
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "46c4d96653379508e98d70f4e5c4436936534672d66c9630eb8d862b4cacc201", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46c4d96653379508e98d70f4e5c4436936534672d66c9630eb8d862b4cacc201", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46c4d96653379508e98d70f4e5c4436936534672d66c9630eb8d862b4cacc201", kill_on_drop: false }`
[INFO] [stdout] 46c4d96653379508e98d70f4e5c4436936534672d66c9630eb8d862b4cacc201
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 32576c8335c6c0ab12b654816d0bbc183aa5680815e0f976e1a9b8ca6f63a607
[INFO] running `Command { std: "docker" "start" "-a" "32576c8335c6c0ab12b654816d0bbc183aa5680815e0f976e1a9b8ca6f63a607", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.35
[INFO] [stderr]     Checking num-traits v0.1.42
[INFO] [stderr]     Checking regex-syntax v0.4.2
[INFO] [stderr]     Checking rand v0.4.2
[INFO] [stderr]     Checking memchr v2.0.1
[INFO] [stderr]     Checking num-integer v0.1.35
[INFO] [stderr]     Checking num-complex v0.1.41
[INFO] [stderr]     Checking aho-corasick v0.6.4
[INFO] [stderr]     Checking num-iter v0.1.34
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking regex v0.2.5
[INFO] [stderr]     Checking num-bigint v0.1.41
[INFO] [stderr]     Checking num-rational v0.1.41
[INFO] [stderr]     Checking num v0.1.41
[INFO] [stderr]     Checking calculator-the-solver v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(option_filter)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(option_filter)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `OpKind` is imported redundantly
[INFO] [stdout]    --> src/op.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 17  | / enum OpKind {
[INFO] [stdout] 18  | |     Add(i32),
[INFO] [stdout] 19  | |     Mul(i32),
[INFO] [stdout] 20  | |     Div(i32),
[INFO] [stdout] ...   |
[INFO] [stdout] 27  | |     Rpc { from_digits: u8, from_n: u32, to_digits: u8, to_n: u32 },
[INFO] [stdout] 28  | | }
[INFO] [stdout]     | |_- the item `OpKind` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 102 |           use self::OpKind;
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Op` is imported redundantly
[INFO] [stdout]    --> src/op.rs:195:13
[INFO] [stdout]     |
[INFO] [stdout] 12  | / pub struct Op {
[INFO] [stdout] 13  | |     inner: OpKind,
[INFO] [stdout] 14  | | }
[INFO] [stdout]     | |_- the item `Op` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 195 |           use self::Op;
[INFO] [stdout]     |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `OpKind` is imported redundantly
[INFO] [stdout]    --> src/op.rs:247:13
[INFO] [stdout]     |
[INFO] [stdout] 17  | / enum OpKind {
[INFO] [stdout] 18  | |     Add(i32),
[INFO] [stdout] 19  | |     Mul(i32),
[INFO] [stdout] 20  | |     Div(i32),
[INFO] [stdout] ...   |
[INFO] [stdout] 27  | |     Rpc { from_digits: u8, from_n: u32, to_digits: u8, to_n: u32 },
[INFO] [stdout] 28  | | }
[INFO] [stdout]     | |_- the item `OpKind` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 247 |           use self::OpKind;
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `OpKind` is imported redundantly
[INFO] [stdout]    --> src/op.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 17  | / enum OpKind {
[INFO] [stdout] 18  | |     Add(i32),
[INFO] [stdout] 19  | |     Mul(i32),
[INFO] [stdout] 20  | |     Div(i32),
[INFO] [stdout] ...   |
[INFO] [stdout] 27  | |     Rpc { from_digits: u8, from_n: u32, to_digits: u8, to_n: u32 },
[INFO] [stdout] 28  | | }
[INFO] [stdout]     | |_- the item `OpKind` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 102 |           use self::OpKind;
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Op` is imported redundantly
[INFO] [stdout]    --> src/op.rs:195:13
[INFO] [stdout]     |
[INFO] [stdout] 12  | / pub struct Op {
[INFO] [stdout] 13  | |     inner: OpKind,
[INFO] [stdout] 14  | | }
[INFO] [stdout]     | |_- the item `Op` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 195 |           use self::Op;
[INFO] [stdout]     |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `OpKind` is imported redundantly
[INFO] [stdout]    --> src/op.rs:247:13
[INFO] [stdout]     |
[INFO] [stdout] 17  | / enum OpKind {
[INFO] [stdout] 18  | |     Add(i32),
[INFO] [stdout] 19  | |     Mul(i32),
[INFO] [stdout] 20  | |     Div(i32),
[INFO] [stdout] ...   |
[INFO] [stdout] 27  | |     Rpc { from_digits: u8, from_n: u32, to_digits: u8, to_n: u32 },
[INFO] [stdout] 28  | | }
[INFO] [stdout]     | |_- the item `OpKind` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 247 |           use self::OpKind;
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/op.rs:197:9
[INFO] [stdout]     |
[INFO] [stdout] 197 | /         lazy_static! {
[INFO] [stdout] 198 | |             static ref RPC_PATTERN: Regex = Regex::new(r"(\d+)=>(\d+)").unwrap();
[INFO] [stdout] 199 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/op.rs:197:9
[INFO] [stdout]     |
[INFO] [stdout] 197 | /         lazy_static! {
[INFO] [stdout] 198 | |             static ref RPC_PATTERN: Regex = Regex::new(r"(\d+)=>(\d+)").unwrap();
[INFO] [stdout] 199 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 4 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 `calculator-the-solver` due to 3 previous errors; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 2 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "32576c8335c6c0ab12b654816d0bbc183aa5680815e0f976e1a9b8ca6f63a607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32576c8335c6c0ab12b654816d0bbc183aa5680815e0f976e1a9b8ca6f63a607", kill_on_drop: false }`
[INFO] [stdout] 32576c8335c6c0ab12b654816d0bbc183aa5680815e0f976e1a9b8ca6f63a607
