[INFO] fetching crate mathcli 0.1.2... [INFO] testing mathcli-0.1.2 against 1.60.0 for beta-1.61-1 [INFO] extracting crate mathcli 0.1.2 into /workspace/builds/worker-14/source [INFO] validating manifest of crates.io crate mathcli 0.1.2 on toolchain 1.60.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate mathcli 0.1.2 [INFO] finished tweaking crates.io crate mathcli 0.1.2 [INFO] tweaked toml for crates.io crate mathcli 0.1.2 written to /workspace/builds/worker-14/source/Cargo.toml [INFO] crate crates.io crate mathcli 0.1.2 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Downloading crates ... [INFO] [stderr] Downloaded indexmap v1.5.2 [INFO] [stderr] Downloaded clap_derive v3.0.0-beta.1 [INFO] [stderr] Downloaded clap v3.0.0-beta.1 [INFO] [stderr] Downloaded stderrlog v0.5.0 [INFO] [stderr] Downloaded os_str_bytes v2.3.2 [INFO] [stderr] Downloaded proc-macro2 v1.0.20 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 7febb1323cd38f470c50ec9f7f339044e605c84e923464f939da32656cc0046a [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" "7febb1323cd38f470c50ec9f7f339044e605c84e923464f939da32656cc0046a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "7febb1323cd38f470c50ec9f7f339044e605c84e923464f939da32656cc0046a", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7febb1323cd38f470c50ec9f7f339044e605c84e923464f939da32656cc0046a", kill_on_drop: false }` [INFO] [stdout] 7febb1323cd38f470c50ec9f7f339044e605c84e923464f939da32656cc0046a [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] b13692a1924a53a57b6d0745e5635c0a68d769df6c599a3d1e2ae5fd2c9ef0f5 [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" "b13692a1924a53a57b6d0745e5635c0a68d769df6c599a3d1e2ae5fd2c9ef0f5", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.20 [INFO] [stderr] Compiling syn v1.0.39 [INFO] [stderr] Compiling libc v0.2.76 [INFO] [stderr] Compiling unicode-segmentation v1.6.0 [INFO] [stderr] Compiling log v0.4.11 [INFO] [stderr] Compiling termcolor v1.1.0 [INFO] [stderr] Compiling os_str_bytes v2.3.2 [INFO] [stderr] Compiling num-traits v0.2.12 [INFO] [stderr] Compiling num-integer v0.1.43 [INFO] [stderr] Compiling hashbrown v0.8.2 [INFO] [stderr] Compiling indexmap v1.5.2 [INFO] [stderr] Compiling proc-macro-error-attr v0.4.12 [INFO] [stderr] Compiling proc-macro-error v0.4.12 [INFO] [stderr] Compiling thread_local v1.0.1 [INFO] [stderr] Compiling heck v0.3.1 [INFO] [stderr] Compiling atty v0.2.14 [INFO] [stderr] Compiling time v0.1.44 [INFO] [stderr] Compiling quote v1.0.7 [INFO] [stderr] Compiling chrono v0.4.15 [INFO] [stderr] Compiling stderrlog v0.5.0 [INFO] [stderr] Compiling syn-mid v0.5.0 [INFO] [stderr] Compiling clap_derive v3.0.0-beta.1 [INFO] [stderr] Compiling clap v3.0.0-beta.1 [INFO] [stderr] Compiling mathcli v0.1.2 (/opt/rustwide/workdir) [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/main.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(iter_map_while, iterator_fold_self, exclusive_range_pattern)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0599]: no method named `fold_first` found for opaque type `impl Iterator` in the current scope [INFO] [stdout] --> src/main.rs:84:31 [INFO] [stdout] | [INFO] [stdout] 84 | false => parsed_lines.fold_first(|acc, x| operator(acc, x)).unwrap() [INFO] [stdout] | ^^^^^^^^^^ method not found in `impl Iterator` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to 2 previous errors [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0554, E0599. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0554`. [INFO] [stdout] [INFO] [stderr] error: could not compile `mathcli` due to 3 previous errors [INFO] running `Command { std: "docker" "inspect" "b13692a1924a53a57b6d0745e5635c0a68d769df6c599a3d1e2ae5fd2c9ef0f5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b13692a1924a53a57b6d0745e5635c0a68d769df6c599a3d1e2ae5fd2c9ef0f5", kill_on_drop: false }` [INFO] [stdout] b13692a1924a53a57b6d0745e5635c0a68d769df6c599a3d1e2ae5fd2c9ef0f5