[INFO] cloning repository https://github.com/kyusque/saba
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kyusque/saba" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkyusque%2Fsaba", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkyusque%2Fsaba'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1c6b530fc7ff737876b933c3ac7542ee7266d9f2
[INFO] testing kyusque/saba against 1.90.0 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkyusque%2Fsaba" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/kyusque/saba
[INFO] finished tweaking git repo https://github.com/kyusque/saba
[INFO] tweaked toml for git repo https://github.com/kyusque/saba written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kyusque/saba on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kyusque/saba already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/hikalium/wasabi.git`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded az v1.2.1
[INFO] [stderr]   Downloaded embedded-graphics-core v0.4.0
[INFO] [stderr]   Downloaded micromath v2.1.0
[INFO] [stderr]   Downloaded syn v2.0.93
[INFO] [stderr]   Downloaded embedded-graphics v0.8.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5739d7287ca10764f0ee498d8c872f3cdf4eb1a7589d1d99b48b82ca6b97f692
[INFO] running `Command { std: "docker" "start" "-a" "5739d7287ca10764f0ee498d8c872f3cdf4eb1a7589d1d99b48b82ca6b97f692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5739d7287ca10764f0ee498d8c872f3cdf4eb1a7589d1d99b48b82ca6b97f692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5739d7287ca10764f0ee498d8c872f3cdf4eb1a7589d1d99b48b82ca6b97f692", kill_on_drop: false }`
[INFO] [stdout] 5739d7287ca10764f0ee498d8c872f3cdf4eb1a7589d1d99b48b82ca6b97f692
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "RUSTDOCFLAGS=--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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9739a38627c8b0ca27826a60e226daeb152b813e728e1a762312707198fd4b40
[INFO] running `Command { std: "docker" "start" "-a" "9739a38627c8b0ca27826a60e226daeb152b813e728e1a762312707198fd4b40", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.92
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling unicode-ident v1.0.14
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling micromath v2.1.0
[INFO] [stderr]    Compiling sabi v0.1.0 (https://github.com/hikalium/wasabi.git?branch=for_saba#abf27c6f)
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling quote v1.0.38
[INFO] [stderr]    Compiling syn v2.0.93
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling embedded-graphics-core v0.4.0
[INFO] [stderr]    Compiling embedded-graphics v0.8.1
[INFO] [stderr]    Compiling font v0.1.0 (https://github.com/hikalium/wasabi.git?branch=for_saba#abf27c6f)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/wasabi-04a0faff37db1492/abf27c6/font/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `font` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9739a38627c8b0ca27826a60e226daeb152b813e728e1a762312707198fd4b40", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9739a38627c8b0ca27826a60e226daeb152b813e728e1a762312707198fd4b40", kill_on_drop: false }`
[INFO] [stdout] 9739a38627c8b0ca27826a60e226daeb152b813e728e1a762312707198fd4b40