[INFO] cloning repository https://github.com/grzech/Arduino_plant_moisture
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/grzech/Arduino_plant_moisture" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrzech%2FArduino_plant_moisture", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrzech%2FArduino_plant_moisture'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 15cfaa674441cffa36bd7b136d73d394635722ab
[INFO] testing grzech/Arduino_plant_moisture against beta-2026-04-21 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgrzech%2FArduino_plant_moisture" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/grzech/Arduino_plant_moisture
[INFO] finished tweaking git repo https://github.com/grzech/Arduino_plant_moisture
[INFO] tweaked toml for git repo https://github.com/grzech/Arduino_plant_moisture written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/grzech/Arduino_plant_moisture on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/grzech/Arduino_plant_moisture 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: build
[INFO] [stderr] help: build is a valid .cargo/config.toml key
[INFO] [stderr] warning: unused manifest key: unstable
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 047820f4c1a3e9b7fe9b7e5245c655cf34ec2dd1a54dd5ec2efe24f85af6674d
[INFO] running `Command { std: "docker" "start" "-a" "047820f4c1a3e9b7fe9b7e5245c655cf34ec2dd1a54dd5ec2efe24f85af6674d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "047820f4c1a3e9b7fe9b7e5245c655cf34ec2dd1a54dd5ec2efe24f85af6674d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "047820f4c1a3e9b7fe9b7e5245c655cf34ec2dd1a54dd5ec2efe24f85af6674d", kill_on_drop: false }`
[INFO] [stdout] 047820f4c1a3e9b7fe9b7e5245c655cf34ec2dd1a54dd5ec2efe24f85af6674d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 254b3b4b60add34eb791f857f612fc90be8a73416108697d5da88bec438b0a7c
[INFO] running `Command { std: "docker" "start" "-a" "254b3b4b60add34eb791f857f612fc90be8a73416108697d5da88bec438b0a7c", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: build
[INFO] [stderr] help: build is a valid .cargo/config.toml key
[INFO] [stderr] warning: unused manifest key: unstable
[INFO] [stderr]    Compiling proc-macro2 v1.0.79
[INFO] [stderr]    Compiling unicode-ident v1.0.6
[INFO] [stderr]    Compiling quote v1.0.23
[INFO] [stderr]    Compiling syn v1.0.107
[INFO] [stderr]    Compiling rustversion v1.0.11
[INFO] [stderr]    Compiling proc-macro-hack v0.5.20+deprecated
[INFO] [stderr]    Compiling ufmt-write v0.1.0
[INFO] [stderr]    Compiling paste v1.0.11
[INFO] [stderr]    Compiling nb v1.1.0
[INFO] [stderr]    Compiling nb v0.1.3
[INFO] [stderr]    Compiling vcell v0.1.3
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling bare-metal v1.0.0
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling embedded-hal v0.2.7
[INFO] [stderr]    Compiling embedded-storage v0.2.0
[INFO] [stderr]    Compiling panic-halt v0.2.0
[INFO] [stderr]    Compiling avr-hal-generic v0.1.0 (https://github.com/rahix/avr-hal?rev=4c9c44c314eb061ee20556ef10d45dea36e75ee4#4c9c44c3)
[INFO] [stderr]    Compiling ufmt-macros v0.2.0
[INFO] [stderr]    Compiling avr-device-macros v0.5.4
[INFO] [stderr]    Compiling ufmt-macros v0.3.0
[INFO] [stderr]    Compiling avr-device v0.5.4
[INFO] [stderr]    Compiling ufmt v0.2.0
[INFO] [stderr]    Compiling ufmt v0.1.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/avr-hal-88cb7c7248a695f0/4c9c44c/avr-hal-generic/src/lib.rs:2:32
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![cfg_attr(avr_hal_asm_macro, feature(asm_experimental_arch))]
[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 `avr-hal-generic` (lib) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "254b3b4b60add34eb791f857f612fc90be8a73416108697d5da88bec438b0a7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "254b3b4b60add34eb791f857f612fc90be8a73416108697d5da88bec438b0a7c", kill_on_drop: false }`
[INFO] [stdout] 254b3b4b60add34eb791f857f612fc90be8a73416108697d5da88bec438b0a7c