[INFO] cloning repository https://github.com/OliverKillane/brainfuck_compiler
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/OliverKillane/brainfuck_compiler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOliverKillane%2Fbrainfuck_compiler", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOliverKillane%2Fbrainfuck_compiler'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fde5ef4668fcdac5221f640a14128af37e1adf79
[INFO] testing OliverKillane/brainfuck_compiler against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOliverKillane%2Fbrainfuck_compiler" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/OliverKillane/brainfuck_compiler 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] removed /workspace/builds/worker-7/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/OliverKillane/brainfuck_compiler
[INFO] finished tweaking git repo https://github.com/OliverKillane/brainfuck_compiler
[INFO] tweaked toml for git repo https://github.com/OliverKillane/brainfuck_compiler written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/OliverKillane/brainfuck_compiler 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1d1df94490dfb1975d18baa1f35ab28a791977f1fa23e0093d2c074415a7f11d
[INFO] running `Command { std: "docker" "start" "-a" "1d1df94490dfb1975d18baa1f35ab28a791977f1fa23e0093d2c074415a7f11d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1d1df94490dfb1975d18baa1f35ab28a791977f1fa23e0093d2c074415a7f11d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d1df94490dfb1975d18baa1f35ab28a791977f1fa23e0093d2c074415a7f11d", kill_on_drop: false }`
[INFO] [stdout] 1d1df94490dfb1975d18baa1f35ab28a791977f1fa23e0093d2c074415a7f11d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 897c02ae4951fa9be022f370728792c7ba8666aab0dd91561e3ecdcd5e4a181e
[INFO] running `Command { std: "docker" "start" "-a" "897c02ae4951fa9be022f370728792c7ba8666aab0dd91561e3ecdcd5e4a181e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.121
[INFO] [stderr]    Compiling textwrap v0.15.0
[INFO] [stderr]    Compiling syn v1.0.89
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.1.4
[INFO] [stderr]    Compiling clap v3.1.6
[INFO] [stderr]    Compiling brainfuck_compiler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 64 | #![feature(fn_traits)]
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/main.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 | #![feature(fmt_internals)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `brainfuck_compiler` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "897c02ae4951fa9be022f370728792c7ba8666aab0dd91561e3ecdcd5e4a181e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "897c02ae4951fa9be022f370728792c7ba8666aab0dd91561e3ecdcd5e4a181e", kill_on_drop: false }`
[INFO] [stdout] 897c02ae4951fa9be022f370728792c7ba8666aab0dd91561e3ecdcd5e4a181e