[INFO] cloning repository https://github.com/nbrendler/keybase-chat-tui
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nbrendler/keybase-chat-tui" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnbrendler%2Fkeybase-chat-tui", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnbrendler%2Fkeybase-chat-tui'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 94486f0e7f79c3cbd30ca4e47d155be5f21b103d
[INFO] testing nbrendler/keybase-chat-tui against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnbrendler%2Fkeybase-chat-tui" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nbrendler/keybase-chat-tui on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nbrendler/keybase-chat-tui
[INFO] finished tweaking git repo https://github.com/nbrendler/keybase-chat-tui
[INFO] tweaked toml for git repo https://github.com/nbrendler/keybase-chat-tui written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/nbrendler/keybase-chat-tui already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-4/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7054ba40e694c830272d934f6787c4a3d1e299f533f7c93e57abc670fb43a6e
[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" "f7054ba40e694c830272d934f6787c4a3d1e299f533f7c93e57abc670fb43a6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7054ba40e694c830272d934f6787c4a3d1e299f533f7c93e57abc670fb43a6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7054ba40e694c830272d934f6787c4a3d1e299f533f7c93e57abc670fb43a6e", kill_on_drop: false }`
[INFO] [stdout] f7054ba40e694c830272d934f6787c4a3d1e299f533f7c93e57abc670fb43a6e
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 94bcc766e2deb34203492e7caf3821b7262ad986b493b063c5dd82e3f2b99cf0
[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" "94bcc766e2deb34203492e7caf3821b7262ad986b493b063c5dd82e3f2b99cf0", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling array-macro v1.0.5
[INFO] [stderr]    Compiling xi-unicode v0.2.1
[INFO] [stderr]    Compiling hashbrown v0.5.0
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling ncurses v5.99.0
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]    Compiling dirs-sys v0.3.5
[INFO] [stderr]    Compiling term_size v0.3.2
[INFO] [stderr]    Compiling signal-hook v0.1.16
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling dirs v2.0.2
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling num v0.2.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling darling_core v0.10.2
[INFO] [stderr]    Compiling enum-map-derive v0.4.3
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling async-trait v0.1.41
[INFO] [stderr]    Compiling tokio v0.2.22
[INFO] [stderr]    Compiling darling_macro v0.10.2
[INFO] [stderr]    Compiling enum-map v0.6.3
[INFO] [stderr]    Compiling darling v0.10.2
[INFO] [stderr]    Compiling enumset_derive v0.4.4
[INFO] [stderr]    Compiling enumset v0.4.5
[INFO] [stderr]    Compiling toml v0.5.7
[INFO] [stderr]    Compiling cursive v0.13.0
[INFO] [stderr]    Compiling keybase-chat-tui v1.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(exact_size_is_empty)]
[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 `keybase-chat-tui`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "94bcc766e2deb34203492e7caf3821b7262ad986b493b063c5dd82e3f2b99cf0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94bcc766e2deb34203492e7caf3821b7262ad986b493b063c5dd82e3f2b99cf0", kill_on_drop: false }`
[INFO] [stdout] 94bcc766e2deb34203492e7caf3821b7262ad986b493b063c5dd82e3f2b99cf0
