[INFO] cloning repository https://github.com/kaiserthe13th/tr-lang-py
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kaiserthe13th/tr-lang-py" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaiserthe13th%2Ftr-lang-py", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaiserthe13th%2Ftr-lang-py'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9b7229b06caf722ac6a5c2be0e65dc0bb209e211
[INFO] testing kaiserthe13th/tr-lang-py against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaiserthe13th%2Ftr-lang-py" "/workspace/builds/worker-10/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-10/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kaiserthe13th/tr-lang-py 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-10/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/kaiserthe13th/tr-lang-py
[INFO] finished tweaking git repo https://github.com/kaiserthe13th/tr-lang-py
[INFO] tweaked toml for git repo https://github.com/kaiserthe13th/tr-lang-py written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/kaiserthe13th/tr-lang`
[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 io-lifetimes v0.6.1
[INFO] [stderr]   Downloaded pyo3-macros v0.15.2
[INFO] [stderr]   Downloaded fd-lock v3.0.5
[INFO] [stderr]   Downloaded pyo3-build-config v0.15.2
[INFO] [stderr]   Downloaded pyo3-macros-backend v0.15.2
[INFO] [stderr]   Downloaded pyo3 v0.15.2
[INFO] [stderr]   Downloaded linux-raw-sys v0.0.42
[INFO] [stderr]   Downloaded rustix v0.34.3
[INFO] [stderr]   Downloaded locale_config v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] 84a19edd9eaeec893b1a7010dbbe9fe0940a1a580ef1f5b979f419b4ed8c0e6c
[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" "84a19edd9eaeec893b1a7010dbbe9fe0940a1a580ef1f5b979f419b4ed8c0e6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84a19edd9eaeec893b1a7010dbbe9fe0940a1a580ef1f5b979f419b4ed8c0e6c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84a19edd9eaeec893b1a7010dbbe9fe0940a1a580ef1f5b979f419b4ed8c0e6c", kill_on_drop: false }`
[INFO] [stdout] 84a19edd9eaeec893b1a7010dbbe9fe0940a1a580ef1f5b979f419b4ed8c0e6c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] d0ec46b28000b301bf14f721f77dd43880029dd4377108b6fd65c07ea58bf9d6
[INFO] running `Command { std: "docker" "start" "-a" "d0ec46b28000b301bf14f721f77dd43880029dd4377108b6fd65c07ea58bf9d6", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.91
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]    Compiling pyo3-build-config v0.15.2
[INFO] [stderr]    Compiling io-lifetimes v0.6.1
[INFO] [stderr]    Compiling rustix v0.34.3
[INFO] [stderr]    Compiling linux-raw-sys v0.0.42
[INFO] [stderr]    Compiling log v0.4.16
[INFO] [stderr]    Compiling unindent v0.1.8
[INFO] [stderr]    Compiling endian-type v0.1.2
[INFO] [stderr]    Compiling utf8parse v0.2.0
[INFO] [stderr]    Compiling nibble_vec v0.1.0
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]    Compiling locale_config v0.3.0
[INFO] [stderr]    Compiling radix_trie v0.2.1
[INFO] [stderr]    Compiling paste v0.1.18
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling pyo3 v0.15.2
[INFO] [stderr]    Compiling dirs-sys-next v0.1.2
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling nix v0.23.1
[INFO] [stderr]    Compiling fd-lock v3.0.5
[INFO] [stderr]    Compiling dirs-next v2.0.0
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling tr-lang v0.4.0-rc3 (https://github.com/kaiserthe13th/tr-lang?rev=2f23ca7#2f23ca7e)
[INFO] [stderr]    Compiling pyo3-macros-backend v0.15.2
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling indoc-impl v0.3.6
[INFO] [stderr]    Compiling rustyline v9.1.2
[INFO] [stderr]    Compiling indoc v0.3.6
[INFO] [stderr]    Compiling pyo3-macros v0.15.2
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/tr-lang-cf8745d67cda64ff/2f23ca7/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(io_error_more)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tr-lang` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "d0ec46b28000b301bf14f721f77dd43880029dd4377108b6fd65c07ea58bf9d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d0ec46b28000b301bf14f721f77dd43880029dd4377108b6fd65c07ea58bf9d6", kill_on_drop: false }`
[INFO] [stdout] d0ec46b28000b301bf14f721f77dd43880029dd4377108b6fd65c07ea58bf9d6