[INFO] updating cached repository https://github.com/milesand/calculator-the-solver [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] aa074792688f3ccc44a51a3e5b7af26239e9751d [INFO] testing milesand/calculator-the-solver against 1.44.0 for beta-1.45-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmilesand%2Fcalculator-the-solver" "/workspace/builds/worker-4/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/milesand/calculator-the-solver on toolchain 1.44.0 [INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"` [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-4/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 `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"` [INFO] [stdout] 1a9d91b4578283fa120327f43959659b621a716c10e9c2f230be4cd711231d26 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `"docker" "start" "-a" "1a9d91b4578283fa120327f43959659b621a716c10e9c2f230be4cd711231d26"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling num-traits v0.1.42 [INFO] [stderr] Compiling rand v0.4.2 [INFO] [stderr] Compiling num-integer v0.1.35 [INFO] [stderr] Compiling num-complex v0.1.41 [INFO] [stderr] Compiling num-iter v0.1.34 [INFO] [stderr] Compiling rand v0.3.22 [INFO] [stderr] Compiling num-bigint v0.1.41 [INFO] [stderr] Compiling num-rational v0.1.41 [INFO] [stderr] Compiling num v0.1.41 [INFO] [stderr] Compiling calculator-the-solver v0.0.1 (/opt/rustwide/workdir) [INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stderr] --> src/lib.rs:1:1 [INFO] [stderr] | [INFO] [stderr] 1 | #![feature(option_filter)] [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stderr] --> src/lib.rs:2:1 [INFO] [stderr] | [INFO] [stderr] 2 | #![feature(try_from)] [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `OpKind` is imported redundantly [INFO] [stderr] --> src/op.rs:102:13 [INFO] [stderr] | [INFO] [stderr] 17 | / enum OpKind { [INFO] [stderr] 18 | | Add(i32), [INFO] [stderr] 19 | | Mul(i32), [INFO] [stderr] 20 | | Div(i32), [INFO] [stderr] ... | [INFO] [stderr] 27 | | Rpc { from_digits: u8, from_n: u32, to_digits: u8, to_n: u32 }, [INFO] [stderr] 28 | | } [INFO] [stderr] | |_- the item `OpKind` is already defined here [INFO] [stderr] ... [INFO] [stderr] 102 | use self::OpKind; [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: the item `Op` is imported redundantly [INFO] [stderr] --> src/op.rs:195:13 [INFO] [stderr] | [INFO] [stderr] 12 | / pub struct Op { [INFO] [stderr] 13 | | inner: OpKind, [INFO] [stderr] 14 | | } [INFO] [stderr] | |_- the item `Op` is already defined here [INFO] [stderr] ... [INFO] [stderr] 195 | use self::Op; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: the item `OpKind` is imported redundantly [INFO] [stderr] --> src/op.rs:247:13 [INFO] [stderr] | [INFO] [stderr] 17 | / enum OpKind { [INFO] [stderr] 18 | | Add(i32), [INFO] [stderr] 19 | | Mul(i32), [INFO] [stderr] 20 | | Div(i32), [INFO] [stderr] ... | [INFO] [stderr] 27 | | Rpc { from_digits: u8, from_n: u32, to_digits: u8, to_n: u32 }, [INFO] [stderr] 28 | | } [INFO] [stderr] | |_- the item `OpKind` is already defined here [INFO] [stderr] ... [INFO] [stderr] 247 | use self::OpKind; [INFO] [stderr] | ^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: use of deprecated item 'std::sync::ONCE_INIT': the `new` function is now preferred [INFO] [stderr] --> src/op.rs:197:9 [INFO] [stderr] | [INFO] [stderr] 197 | / lazy_static! { [INFO] [stderr] 198 | | static ref RPC_PATTERN: Regex = Regex::new(r"(\d+)=>(\d+)").unwrap(); [INFO] [stderr] 199 | | } [INFO] [stderr] | |_________^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(deprecated)]` on by default [INFO] [stderr] = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stderr] [INFO] [stderr] error: aborting due to 2 previous errors; 4 warnings emitted [INFO] [stderr] [INFO] [stderr] For more information about this error, try `rustc --explain E0554`. [INFO] [stderr] error: could not compile `calculator-the-solver`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "1a9d91b4578283fa120327f43959659b621a716c10e9c2f230be4cd711231d26"` [INFO] running `"docker" "rm" "-f" "1a9d91b4578283fa120327f43959659b621a716c10e9c2f230be4cd711231d26"` [INFO] [stdout] 1a9d91b4578283fa120327f43959659b621a716c10e9c2f230be4cd711231d26